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Petrological and Os Isotopic Characteristics of Zedong Peridotites in the Eastern Yarlung–Zangbo Suture in Tibet
Shengmin LAI,
Jingsui YANG,
Yildirim DILEK,
Fahui XIONG,
Rui JIANG,
Yanhong CHEN,
Shengmin LAI
School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083 China
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorCorresponding Author
Jingsui YANG
School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083 China
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Corresponding author. E-mail: [email protected]Search for more papers by this authorYildirim DILEK
Department of Geology, Shideler Hall, Miami University, Oxford, OH 45056 USA
Search for more papers by this authorFahui XIONG
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorRui JIANG
PetroChina Southwest Oil & Gasfield Company Engineering Technology Research Department, Chengdu 618300 China
Search for more papers by this authorYanhong CHEN
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorShengmin LAI,
Jingsui YANG,
Yildirim DILEK,
Fahui XIONG,
Rui JIANG,
Yanhong CHEN,
Shengmin LAI
School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083 China
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorCorresponding Author
Jingsui YANG
School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083 China
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Corresponding author. E-mail: [email protected]Search for more papers by this authorYildirim DILEK
Department of Geology, Shideler Hall, Miami University, Oxford, OH 45056 USA
Search for more papers by this authorFahui XIONG
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorRui JIANG
PetroChina Southwest Oil & Gasfield Company Engineering Technology Research Department, Chengdu 618300 China
Search for more papers by this authorYanhong CHEN
CARMA, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 China
Search for more papers by this authorAbout the first author:
LAI Shengmin, Male; born in 1991; A Ph. D Candidate from China University of Geosciences, Beijing; Major in mineralogy, petrology and economic geology. E–mail: [email protected].
Abstract
The Zedong ophiolites in the eastern Yarlung–Zangbo suture zone of Tibet represent a mantle slice of more than 45 km2. This massif consists mainly of mantle peridotites, with lesser gabbros, diabases and volcanic rocks. The mantle peridotites are mostly harzburgite, lherzolite; a few dike-like bodies of dunite are also present. Mineral structures show that the peridotites experienced plastic deformation and partial melting. Olivine (Fo89.7–91.2), orthopyroxene (En88–92), clinopyroxene (En45–49Wo47–51Fs2–4) and spinel [Mg#=100×Mg/(Mg+Fe)]=49.1–70.7; Cr#=(100×Cr/(Cr+Al)=18.8–76.5] are the major minerals. The degree of partial melting of mantle peridotites is 10%–40%, indicating that the Zedong mantle peridotites may experience a multi–stage process. The peridotites are characterized by depleted major element compositions and low REE content (0.08–0.62 ppm). Their “spoon–shaped” primitive–mantle normalized REE patterns with (La/Sm)N being 0.50–6.00 indicate that the Zedong ultramafic rocks belong to depleted residual mantle rocks. The PGE content of Zedong peridotites (18.19–50.74 ppb) is similar with primary mantle with Pd/Ir being 0.54–0.60 and Pt/Pd being 1.09–1.66. The Zedong peridotites have variable, unradiogenic Os isotopic compositions with 187Os/188Os=0.1228 to 0.1282. A corollary to this interpretation is that the convecting upper mantle is heterogeneous in Os isotopes. All data of the Zedong peridotites suggest that they formed originally at a mid-ocean ridge (MOR) and were later modified in supra–subduction zone (SSZ) environment.
References
- Aitchison, J.C., Badengzhu, Davis, A.M., Liu, J., Luo, H., Malpas, J.G., McDermid, I., Wu, H., Ziabrev, S., and Zhou, M., 2000. Remnants of a Cretaceous intra–oceanic subduction system within the Yarlung Zangbo suture (southern Tibet). Earth and Planetary Science Letters, 183: 231–244.
- Allègre, C.J., Coutillot, V., and Tapponier, P., 1984. Structure and evolution of the Himalaya–Tibet orogenic belt. Nature, 307: 17–22.
- Arai, S., 1984. Characterization of spinel peridotites by olivine–spinel compositional relationships: review and interpretation. Chemical Geology, 113: 191–204.
- Bédard, É., Hébert, R., Guilmette, C., Lesage, G., Wang, C.S., and Dostal, J., 2009. Petrology and geochemistry of the Saga and Sangsang ophiolitic massifs, Yarlung Zangbo suture zone, southern Tibet: Evidence for an arc–back–arc origin. Lithos, 113: 48–67.
- Bezard, R., Hébert, R., Wang, C.S., Dostal, J., Dai, J.G., and Zhong, H.T., 2011. Petrology and geochemistry of the Xiugugabu ophiolitic massif, western Yarlung Zangbo suture zone. Lithos, 125: 347–367.
- Bodinier, J.L., Menzies, M.A., and Thirlwall, M.F., 1991. Continental to oceanic mantle transition: REE and Sr–Nd isotopic geochemistry of the Lanzo lherzolite massif. Journal of Petrology special volume ‘Orogenic Lherzolites and Mantle Processes’: 191–210.
- Boynton, W.V., 1984. Geochemistry of the earth elements: meteorite studies. In: P. Henderson (ed.), Rare Earth Element Geochemistry. Elsevier, 63–114.
10.1016/B978-0-444-42148-7.50008-3 Google Scholar
- Brandon, A.D., Creaser, R.A., Shirey, S.B., and Carlson, R.W., 1996. Osmium recycling in subduction zones. Science, 272: 861–864.
- Brandon, A.D., Becker, H., Carlson, R.W., and Shirey, S.B., 1999. Isotopic constraints on time scales and mechanisms of slab material transport in the mantle wedge: evidence from the Simcoe mantle xenoliths, Washington, USA. Chemical Geology, 160: 387–407.
- Brandon, A.D., Snow, J.E., Walker, R.J., Morgan, J.W., and Mock, T.D., 2000. 190Pt–186Os and 187Re–187Os systematics of abyssal peridotites. Earth and Planetary Science Letters, 177: 319–335.
- Bridges, J.C., Prichard, H.M., and Meireles, C.A., 1995. Podiform chromitite–bearing ultrabasic rocks from the Braganca massif, northern Portugal: fragments of island arc mantle? Geological Magazine, 132: 39–49.
- Büchl, A., Brügmann, G., Batanova, V.G., Münker, C., and Hofmann, A.W., 2002. Melt percolation monitored by Os isotopes and HSE abundances: a case study from the mantle section of the Troodos Ophiolite. Earth and Planetary Science Letters, 204: 385–402.
- Burnham, O.M., Rogers, N.W., Pearson, D.G., van Calsteren, P.W., and Hawkesworth, C.J., 1998. The petrogenesis of the eastern Pyrenean peridotites: an integrated study of their whole–rock geochemistry and Re–Os isotope composition. Geochimica et Cosmochimica Acta, 62: 2293–2310.
- Burton, K.W., Schiano, P., Birck, J.L., and Allègre, C.J., 1999. Osmium isotope disequilibrium between minerals in a spinel–lherzolite. Earth and Planetary Science Letters, 172: 311–322.
- Chan, G.H.N., Crowley, Q., Searle, M., Aitchison, J.C., and Horstwood, M., 2007. U–Pb zircon ages of the Yarlung Zangbo suture zone ophiolites, south Tibet; 22th Himalaya–Karakoram–Tibet Workshop, Hong Kong, China: Workshop Abstract, vol. 12.
- Chesley, J., Ruiz, J., Righter, K., Ferrari, L., and Gomez–Tuena, A., 2002. Source contamination versus assimilation: an example from the Trans–Mexican Volcanic Arc. Earth and Planetary Science Letters, 195: 211–221.
- Chesley, J., Righter, K., and Ruiz, J., 2004. Large–scale mantle metasomatism: A Re–Os perspective. Earth and Planetary Science Letters, 219: 49–60.
- Chou, C.L., Shaw, D.M., and Crocket, J.H., 1983. Siderophile trace elements in Earth's oceanic crust and upper mantle. Geophysical Research Letters, 88 (S2): 507–518.
10.1029/JB088iS02p0A507 Google Scholar
- Cohen, A.S., and Waters, F.G., 1996. Separation of osmium from geological materials by solvent extraction for analysis by thermal ionisation mass spectrometry. Analytica Chimica Acta, 332: 269–275.
- Coleman, R.G., 1977. Ophiolites: Ancient Oceanic Lithosphere? Springer–Verlag, Berlin, New York, 1–25.
- Creaser, R.A., Papanastassiou, D.A., and Wasserburg, G.J., 1991. Negative thermal ion mass spectrometry of osmium, rhenium and iridium. Geochimica et Cosmochimica Acta, 55: 397–401.
- Dai, J.G., Wang, C.S., Hebert, R., Santosh, M., Li, Y.L., and Xu, J.Y., 2011. Petrology and geochemistry of peridotites in the Zhongba ophiolite, Yarlung Zangbo Suture Zone: implications for the Early Cretaceous intra–oceanic subduction zone within the Neo–Tethys. Lithos, 288: 133–148.
- Dale, C.W., Gannoun, A., Burton, K.W., Argles, T.W., and Parkinson, I.J., 2007. Rhenium–osmium isotope and elemental behaviour during subduction of oceanic crust and the implications for mantle recycling. Earth and Planetary Science Letters, 253: 211–225.
- Dick, H.J.B., 1977. Partial melting in the Josephine peridotite, the effect on mineral composition and its consequence for geobarometry and geothermometry. American Journal of Science, 277: 801–832.
- Dick, H.J.B., and Bullen, T., 1984. Chromian spinel as a petrogenetic indicator in abyssal and alpine–type peridotites and spatially associated lavas. Contributions to Mineralogy and Petrology, 86: 54–76.
- Dilek, Y., and Furnes, H., 2009. Structure and geochemistry of Tethyan ophiolites and their petrogenesis in subduction rollback systems. Lithos, 113: 1–20.
- Dilek, Y., and Morishita, T., 2009. Meltmigration and upper mantle evolution during incipient arc construction: Jurassic Eastern Mirdita ophiolite, Albania. Island Arc, 18: 551–554.
- Dubois–Côté, V., Hébert, R., Dupuis, C., Wang, C.S., Li, Y.L., and Dostal, J., 2005. Petrological and geochemical evidence for the origin of the Yarlung Zangbo ophiolites, southern Tibet. Chemical Geology, 214: 265–286.
- Dupuis, C., Hébert, R., Dubois–Côté, V., Guilmette, C., Wang, C.S., Li, Y.L., and Li, Z.J., 2005a. The Yarlung Zangbo Suture Zone ophiolitic mélange (Southern Tibet): new insights from geochemistry of ultramafic rocks. Journal of Asian Earth Sciences, 25: 937–960.
- Dupuis, C., Hébert, R., Dubois–Côté, V., Wang, C.S., Li, Y.L., and Li, Z.J., 2005b. Petrology and geochemistry of mafic rocks from melange and flysch units adjacent to the Yarlung Zangbo suture zone, southern Tibet. Chemical Geology, 214: 287–308.
- Dupuis, C., Hébert, R., Guilmette, C., Wang, C.S., and Li, Z.J., 2006. Geochemistry of sedimentary rocks from mélange and flysch units south of the Yarlung Zangbo suture zone, southern Tibet. Journal of Asian Earth Sciences, 26: 489–508.
- Edwards, S.J., 1990. Harburgites and refractory melts in the Lewis hills massif, Bay of Island ophiolite complex: the base–metals and precious–metals story. Canadian Mineralogist, 28: 537–552.
- Feng Guangying, YANG Jingsui, Yildirim DILEK, Liu Fei and Xiong Fahui, 2017. Petrological and Re–Os isotopic constraints on the origin and tectonic setting of the cuobuzha peridotite, yarlung zangbo suture zone, SW Tibet, China. Acta Geologica Sinica (English Edition), 91(s1): 10–11.
10.1111/1755-6724.13152 Google Scholar
- Frei, R., Gervilla, F., Meibom, A., Proenza, J.A., and Garrido, C.J., 2006. Os isotope heterogeneity of the upper mantle: evidence from the Mayari–Baracoa ophiolite belt in eastern Cuba. Earth and Planetary Science Letters, 241: 466–476.
- Gao, S., Rudnick, R.L., Carlson, R.W., McDonough, W.F., and Liu, Y.S., 2002. Re–Os evidence for replacement of ancient mantle lithosphere beneath the North China Craton. Earth and Planetary Science Letters, 198: 307–322.
- Godard, M., Jousselin, D., and Bodinier, J.L., 2000. Relationships between geochemistry and structure beneath a palaeo–spreading Centre: a study of the mantle section in the Oman Ophiolite. Earth and Planetary Science Letters, 180: 133–148.
- Greenbaum, D., 1977. The chromitiferous rocks of the Troodos ophiolite complex. Economic Geology, 72: 1175–1194.
- Guilmette, C., Hébert, R., Dupuis, C., Dubois–Côté, V., Wang, C.S., and Li, Z.J., 2005. Petrology, geochemistry and geochronology of highly foliated amphibolites from the ophiolitic mélange underlying the Yarlung Zangbo Suture Zone Ophiolites, Southern Tibet; geodynamical implications for the dismembered dynamothermal sole. 20th Himalaya–Karakoram–Tibet Workshop, Aussois, France. Geologie Alpine Mémoire H.S., 44: 71.
- Guilmette, C., Hébert, R., Wang, C., Indares, A.D., Ullrich, T.D., Dostal, J., and Bédard, É., 2007. Strongly foliated garnetiferous amphibolites clasts in ophiolitic melanges, Yarlung Zangbo Suture Zone, Tibet; Early Cretaceous disruption of a back–arc basin. American Geophysical Union Fall Meeting, U21B–0419.
- Guilmette, C., Hébert, R., Wang, C.S., and Villeneuve, M., 2009. Geochemistry and geochronology of the metamorphic sole underlying the Xigaze ophiolite, Yarlung Zangbo suture zone, South Tibet. Lithos, 112: 149–162.
- Guo Guolin, Yang Jingsui, Liu Xiaodong, Xu Xiangzhen, Zhang Zhongmin, Tian Yazhou, Xiong Fahui and Wu Yong, 2015. Implications of unusual minerals in Zedong mantle peridotite, Tibet. Geology in China, 42(5): 1483–1492 (in Chinese with English abstract).
- Hamlyn, P.R., Keays, R.R., Cameron, W.E., Crawford, A.J., and Waldron, H.M., 1985. Precious metals in magnesian low–Ti lavas: implications for metallogenesis and sulfur saturation in primary magmas. Geochimica et Cosmochimica Acta, 49: 1797–1811.
- Harvey, J., Gannoun, A., Burton, K.W., Rogers, N.W., Alard, O., and Parkinson, I.J., 2006. Ancient melt extraction from the oceanic upper mantle revealed by Re–Os isotopes in abyssal peridotites from the Mid–Atlantic ridge. Earth and Planetary Science Letters, 244: 606–621.
- Hassler, D.R., and Shimizu, N., 1998. Osmium isotopic evidence for ancient subcontinental lithospheric mantle beneath the Kerguelen islands, southern Indian Ocean. Science, 280: 418–421.
- Hauri, E.H., 1996. Major–element variability in the Hawaiian mantle plume. Nature, 382: 415–419.
- Hawkins, J., 2003. Geology of supra–subduction zones: implications for the origin of ophiolites. Ophiolite concept and the evolution of geological thought: Boulder, Colorado. Geol. Soc. Am. Spec, Pap. 373: 227–268.
- Hébert, R., Beaudoin, G., Varfalvy, V., Huot, F., Wang, C.S., and Liu, Z.F., 2000. Yarlung Zangbo ophiolites, southern Tibet revisited. 15th Himalaya–Karakoram–Tibet Workshop, Chengdu, China. Earth Science Front, 7: 124–126.
- Hébert, R., Huot, F., Varfalvy, V., Benoît, M., Dubois–Côté, V., Dupuis, C., 2001. Geodynamics of Yarlung Zangbo Suture Zone (YZSZ): implications for origin of related Tibetan ophiolites. Eos Trans. AGU 82 (47) Fall Meeting Supplement, V12C–0985.
- Hébert, R., Huot, F., Wang, C.S., and Liu, Z., 2003. Yarlung Zangbo ophiolites, southern Tibet revisited: geodynamic implications from the mineral record. In: Y. Dilek, and P.T. Robinson (eds.), Ophiolites in Earth History: Special Publication, 218. The Geological Society of London, London, 165–190.
- Hébert, R., Bezard, R., Guilmette, C., Dostal, J., Wang, C.S., and Liu, Z.F., 2012. The Indus–Yarlung Zangbo ophiolites from Nanga Parbat to Namche Barwa syntaxes, southern Tibet: first synthesis of petrology, geochemistry, and geochronology with incidences on geodynamic reconstructions of Neo–Tethys. Gondwana Research, 22: 377–397.
- Hirose, K., and Kawamoto, T., 1995. Hydrous partial melting of lherzolite at 1 GPa: the effect of H2O on the genesis of basaltic magmas. Earth and Planetary Science Letters, 133: 463–473.
- Huot, F., Hébert, R., Varfalvy, V., Beaudoin, G., Wang, C., Liu, Z., Cotten, J., and Dostal, J., 2002. The Beimarang Melange (southern Tibet) brings additional constraints in assessing the origin, metamorphic evolution and obduction processes of the Yarlung Zangbo ophiolite. Journal of Asian Earth Sciences, 21: 307–322.
- Jagoutz, E., Palme, H., Baddenhausen, H., Blum, K., Cendales, M., Dreibus, G., Spettel, B., Lorenz, V., and Wänke, H., 1979. The abundances of major, minor and trace elements in the earth's mantle as derived from primitive ultramafic nodules. In: Proc Lunar and Planet Sci Conf 10th. Geochimica et Cosmochimica Acta (supplement 11): 2031–2050.
- Kato, Y., Fujinaga, K., and Suzuki, K., 2005. Major and trace element geochemistry and Os isotopic composition of metalliferous umbers from the Late Cretaceous Japanese accretionary complex. Geochemistry Geophysics Geosystems, 6(7): 846–8
10.1029/2005GC000920 Google Scholar
- Kelemen, P.B., Dick, H.J.B., and Quick, J.E., 1992. Formation of harzburgite by pervasive melt/ rock reaction in the upper mantle. Nature, 358: 635–641.
- Kogiso, T., Hirschmann, M.M., and Reiners, P.W., 2004. Length scales of mantle heterogeneities and their relationship to ocean island basalt geochemistry. Geochimica et Cosmochimica Acta, 68: 345–360.
- Komor, S.C., Grove, T.L., and Hebert, R., 1990. Abyssal peridotites from ODP Hole 670A (21°10' N, 45°02' W): Residues of mantle melting exposed by non–constructive axial divergence. In: Detrick, R., Honnorez, J., and Bryan, W.B. (eds.), Proceedings of the Ocean Drilling Program Scientific Results, vol. 106/109, Ocean Drilling Program, College Station, TX : 85–101.
- Lai Shengmin, Yang Jingsui, Xiong Fahui, Tian Yazhou, Xu Xiangzhen, Zhang Lan and Gao Jian, 2015. The characteristics and significance of Zedong peridotite in eastern Yarlung–Zangbo suture in Tibet. Acta Petrologica Sinica, 31 (12): 3629–3649 (in Chinese with English abstract).
- Li, J., Liang, X.R., Xu, J.F., Suzuki, K., and Dong, Y.H., 2010a. Simplified technique for the measurements of Re–Os isotope by multicollector inductively coupled plasma mass spectrometry (MC–ICP–MS). Geochemical Journal, 44: 73–80.
- Li, J., Xu, J.F., Suzuki, K., He, B., Xu, Y.G., and Ren, Z.Y., 2010b. Os, Nd and Sr isotope and trace element geochemistry of the Muli picrites: insights into the mantle source of the Emeishan Large Igneous Province. Lithos, 119: 108–122.
- Li, J., Zhao, P.P., Liu, J.G., Wang, X.C., Yang, Y., Wang, G.Q., and Xu, J.F., 2015. Reassessment of hydrofluoric acid desilicification in the Carius tube digestion technique for Re–Os isotopic analysis in geological samples. Geostandards & Geoanalytical Research, 39: 17–30.
- Liu, C.Z., Snow, J.E., Hellebrand, E., Brügmann, G., Handt, A., Büchl, A. and Hofmann, A.W., 2008. Ancient, highly heterogeneous mantle beneath Gakkel ridge, Arctic Ocean. Nature, 452: 311–316.
- Liu, C.Z., Wu, F.Y., Wilde, S.A., Yu, L.J., and Li, J.L., 2010. Anorthitic plagioclase and pargasitic amphibole in mantle peridotites from the Yungbwa ophiolite (southwestern Tibetan Plateau) formed by hydrous melt metasomatism. Lithos, 114: 413–422.
- Liu, C.Z., Wu, F.Y., Chu, Z.Y., Ji, W.Q., Yu, L.J., and Li, J.L., 2012. Preservation of ancient Os isotope signatures in the Yungbwa ophiolite (southwestern Tibet) after subduction modification. Asian Earth Science, 53: 38–50.
- Malpas, J., 1978. Magma generation in upper mantle, field evidence from ophiolite suites, and application to generation of oceanic lithosphere. Philosophical Transactions of the Royal Society of London, Series A 288: 527–545.
- Malpas, J., Zhou, M.F., Robinson, P.T., and Reynolds, P.H., 2003. Geochemical and geochronological constraints on the origin and emplacement of the Yarlung Zangbo ophiolite, southern Tibet. In: Dilek, Y., and Robinson, P.T. (eds.), Ophiolites in Earth History. Geological Society Special Publications, 218, London: 191–206.
- McDonough WF and Sun SS. The composition of the Earth. Chemical Geology, 1995, 120(3–4): 223–253.
- Meibom, A., and Frei, R., 2002. Evidence for an ancient osmium isotopic reservoir in Earth. Science, 296: 516–518.
- Meisel, T., and Moser, J., 2004a. Referencematerials for geochemical PGE analysis: newanalytical data for Ru, Rh, Pd, Os, Ir, Pt and Re by isotope dilution ICP–MS in 11 geological reference materials. Chemical Geology, 208: 319–338.
- Meisel, T., and Moser, J., 2004b. Platinum–group element and rhenium concentrations in low abundance reference materials. Geostandards & Geoanalytical Research, 28: 233–250.
- Meisel, T., Moser, J., and Wegscheider, W., 2001. Recognizing heterogeneous distribution of platinum group elements (PGE) in geological materials by means of the Re–Os isotope system. Fresenius’ journal of analytical chemistry, 370: 566–572.
- Meisel, T., Walker, R.J., Irving, A.J., and Lorand, J.P., 2001. Osmium isotopiccompositions of mantle xenoliths: a global perspective. Geochimica et Cosmochimica Acta, 65: 1311–1323.
- Mercier, J.C.C., and Nicolas, A., 1975. Textures and fabrics of upper–mantle peridotites as illustrated by xenoliths from basalts. Journal of Petrology, 16: 454–487.
- Miller, C., Thöni, M., Frank, W., Schuster, R., Melcher, F., Meisel, T., and Zanetti, A., 2003. Geochemistry and tectonomagmatic affinity of the Yungbwa ophiolite, SW Tibet. Lithos, 66: 155–172.
- Mitchell, R.H., and Keays, R.R., 1981. Abundance and distribution of gold, palladium and iridium in some spinel and garnet lherzolites: implications for the nature and origin of precious metal–rich intergranular components in the upper mantle. Geochimica et Cosmochimica Acta, 45: 2425–2442.
- Moores, E.M., and Jackson, E., 1974. Ophiolites and oceanic crust. Nature, 250: 136–139.
- Moores, E., and Vine, F., 1971. The Troodos Massif, Cyprus and other ophiolites as oceanic crust: evaluation and implications. Philosophical Transactions of the Royal Society B–Biological Sciences, 268: 443–467.
- Nicolas, A., Girardeau, J., Marcoux, J., Dupré, B., Wang, X., Zheng, H., Cao, Y., and Xiao, X., 1981. The Xigaze ophiolite: A peculiar oceanic lithosphere. Nature, 294: 414–417.
- Nier, A.O., 1937. The isotopic constitution of osmium. Physical Review, 52(8): 885.
- Nier, A.O., 1950. A redetermination of the relative abundances of the isotopes of carbon, nitrogen, oxygen, argon, and potassium. Physical Review, 77: 789–793.
- Parkinson, I.J., and Pearce, J.A., 1998. Peridotites from the Izu–Bonin–Mariana forearc (ODP Leg 125), evidence for mantle melting, melt–mantle interaction in a suprasubduction zone setting. Journal of Petrology, 39: 1577–1618.
- Parkinson, I.J., Hawkesworth, C.J., and Cohen, A.S., 1998. Ancient mantle in a modern arc: Osmium isotopes in Izu–Bonin–Mariana forearc peridotites. Science, 281: 2011–2013.
- Paulick, H., Bach, W., Godard, M., De Hoog, J.C.M., Suhr, G., and Harvey, J., 2006. Geochemistry of abyssal peridotites (Mid–Atlantic Ridge, 15°20'N, ODP Leg 209): implications for fluid/rock interaction in slow spreading environments. Chemical Geology, 234: 19–210.
- Pearce, J.A., Barker, P.F., Edwards, S.J., Parkinson, I.J., and Leat, P.T., 2000. Geochemistry and tectonic significance of peridotites from the South Sandwich arc–basin system, South Atlantic. Contributions to Mineralogy & Petrology, 139: 36–53.
- Pearson, D.G., and Woodland, S.J., 2000. Solvent extraction/anion exchange separation and determination of PGEs (Os, Ir, Pt, Pd, Ru) and Re–Os isotopes in geological samples by isotope dilution ICP–MS. Chemical Geology, 165: 87–107.
- Reisberg, L., and Lorand, J.P., 1995. Longevity of sub–continental mantle lithosphere from osmium isotope systematics in orogenic peridotite massifs. Nature, 376: 159–162.
- Reisberg, L., and Meisel, T., 2002. The Re–Os isotopic system: A review of analytical techniques. Geostandards & Geoanalytical Research, 26: 249–267.
- Reisberg, L., Zindler, A., Marcantonio, F., White, W., Wyman, D., and Weaver, B., 1993. Os isotope systematics in ocean island basalts. Earth and Planetary Science Letters, 120: 149–167.
- Ringwood, A., Kesson, S., and Hibberson, W., 1981. Rhenium depletion in mare basalts and redox state of the lunar interior. Lunar and Planetary Institute Science Conference Abstracts, 891–893.
- Robinson, P.T., Trumbull, R.B., Schmitt, A., Yang, J.S., Li, J.W., Zhou, M.F., Erzinger, J., Dare, S., and Xiong, F.H., 2015. The origin and significance of crustal minerals in ophiolitic chromitites and peridotites. Gondwana Research, 27: 486–506.
- Saha, A., Basu, A.R., Jacobsen, S.B., Poreda, R.J., Yin, Q.Z., and Yogodzinski, G.M., 2005. Slab devolatilization and Os and Pb mobility in the mantle wedge of the Kamchatka arc. Earth and Planetary Science Letters, 236: 182–194.
- Salters, V.J.M., and Stracke, A., 2004. Composition of the depleted mantle. Geochemistry Geophysics Geosystems, 5: 469–484.
- Schulte, R.F., Schilling, M., Anma, R., Farquhar, J., Horan, M.F., and Komiya, T., 2009. Chemical and chronological complexity in the convecting upper mantle: evidence from the Taitao ophiolite, southern Chile. Geochimica et Cosmochimica Acta, 73: 5793–5819.
- Shi, R.D., Griffin, W.L., O'Reilly, S.Y., Huang, Q.S., Zhang, X.R., Liu, D.L., Zhi, X.C., Xia, Q.X., and Ding, L., 2012. Melt/mantle mixing produces podiform chromite deposits in ophiolites: Implications of Re–Os systematics in the Dongqiao Neo–tethyan ophiolite, northern Tibet. Gondwana Research, 21: 194–206.
- Shirey, S.B., and Walker, R.J., 1995. Carius tube digestion for low–blank rhenium–osmium analysis. Analytica Chimica Acta, 67: 2136–2141.
- Shirey, S.B., and Walker, R.J., 1998. The Re–Os isotope system in cosmochemistry and high–temperature geochemistry. Earth and Planetary Science Letters, 26: 423–500.
- Snow, J.E., and Dick, H.J.B., 1995. Pervasive magnesium loss by marine weathering of peridotite. Geochimica et Cosmochimica Acta, 59: 4219–4235.
- Snow, J.E., and Reisberg, L., 1995. Os isotopic systematics of the MORB mantle: results from altered abyssal peridotites. Earth and Planetary Science Letters, 133: 411–421.
- Standish, J.J., Hart, S.R., Blusztajn, J., Dick, H.J.B., and Lee, K.L., 2002. Abyssal peridotite osmium isotopic compositions from Cr–spinel. Geochemistry Geophysics Geosystems, 3: 1–24.
- Suhr, G., Hellebrand, E., Snow, J.E., Seck, H.A., and Hofmann, A.W., 2003. Significance of large, refractory dunite bodies in the upper mantle of the Bay of Islands Ophiolite. Geochemistry Geophysics Geosystems, 4: 8605.
- Sun, Y., Guan, K., and Du, A., 1998a. Determination of platinum group elements by ICP–MS with nickel sulfide fire assay collection and telluriumcoprecipitation. ICP Information Newsletter, 24: 114–115.
- Sun, Y., Guan, X., and Du, A., 1998b. Determination of platinum group elements by inductively coupled plasma–mass spectrometry combined with nickel sulfide fire assay and tellurium coprecipitation. Spectrochimica Acta Part B Atomic Spectroscopy, 53: 1463–1467.
- Sun, Y., and Sun, M., 2005. Nickel sulfide fire assay improved for pre–concentration of platinum–group elements in geological samples: a practical means of ultra–trace analysis combined with inductively coupled plasma–mass spectrometry. Analyst, 130: 664–669.
- Suzuki, K., and Honda, M., 2003. Analytical procedure for osmium and rhenium isotopes. Frontire Research on Earth Evolution, 1: 379–381.
- Suzuki, K., Miyata, Y., and Kanazawa, N., 2004. Precise Re isotope ratio measurements by negative thermal ionization mass spectrometry (NTI–MS) using total evaporation technique. International Journal of Mass Spectrometry, 235: 97–101.
- Tapponnier, P., Mercier, J.L., Proust, F., Andrieux, J., Armijo, R., Bassoullet, J.P., Brunel, M., Burg, J.P., Colchen, M., Dupré, B., Girardeau, J., Marcoux, J., Mascle, G., Matte, P., Nicolas, A., Li, T., Xiao, X., Chang, C., Lin, P., Li, G., Wang, N., Chen, G., Han, T., Wang, X., Den, W., Zhen, H., Sheng, H., Cao, Y., Zhou, J., and Qiu, H., 1981. Tibetan side of the India–Eurasia collision. Nature, 294: 405–410.
- Van Acken, D., Becker, H., Hammerschmidt, K., Walker, R.J., and Wombacher, F., 2010. Highly siderophile elements and Sr–Nd isotopes in refertilized mantle peridotites—a case study from the Totalp ultramafic body, Swiss Alps. Chemical Geology, 276: 257–268.
- Vernon, R.H., 2004. A Practical Guide to Rock Microstructure. Cambridge University Press, 469–474.
- Völkening, J., Walczyk, T.G., and Heumann, K., 1991. Osmium isotope ratio determinations by negative thermal ionization mass spectrometry. Int. Mass Spectrom. Ion Processes, 105: 147–159.
- Walker, R.J., and Morgan, J.W., 1989. Rhenium–osmium isotope systematics of carbonaceous chondrites. Science, 243: 519–522.
- Walker, R.J., Carlson, R.W., Shirey, S.B., and Boyd, F.R., 1989. Os, Sr, Nd, and Pb isotope systematics of southern African peridotite xenoliths: implications for the chemical evolution of subcontinental mantle. Geochimica et Cosmochimica Acta, 53: 1583–1595.
- Walker, R.J., Brandon, A.D., Bird, J.M., Piccoli, P.M., McDonough, W.F., and Ash, R.D., 2005. 187Os–186Os systematics of Os–Ir–Ru alloy grains from southwestern Oregon. Earth and Planetary Science Letters, 230: 211–226.
- Wang, X.B., and Bao, P.S., 1987. Xizang (Tibet) Ophiolite. Beijing: Geological Publishing House, 235–246.
- Wei, Z.Q., Xia, B., Zhang, Y.Q., Wang, R., 2006. SHRIMP zircon dating of diabase in the Xiugugabu ophiolite in Tibet and its geological implications. Geotectonica Et Metallogenia, 30: 93–97 (in Chinese with English abstract).
- Widom, E., Kepezhinskas, P., and Defant, M., 2003. The nature of metasomatism in the sub–arc mantle wedge: evidence from Re–Os isotopes in Kamchatka peridotite xenoliths. Chemical Geology, 196: 283–306.
- Wu, F.Y., Walker, R.J., Ren, X.W., Sun, D.Y., and Zhou, X.H., 2003. Osmium isotopic constraints on the age of lithospheric mantle beneath northeastern China. Chemical Geology, 196: 107–129.
- Wu, F.Y., Walker, R.J., Yang, Y.H., Yuan, H.L., and Yang, J.H., 2006. The chemical–temporal evolution of lithospheric mantle underlying the North China Craton. Geochimica et Cosmochimica Acta, 70: 5013–5034.
- Xiong Fahui, Yang Jingsui, Liang Fenghua, Ba Dengzhu, Zhang Jian, Xu Xiangzhen, Li Yuan and Liu Zhao, 2011. Zircon U–Pb ages of the Dongbo ophiolite in the western Yarlung Zangbo suture zone and their geological significance. Acta Petrologica Sinica, 27: 3223–3238 (in Chinese with English abstract).
- Xiong Fahui, Yang Jingsui, Liu Zhao, Guo Guolin, Chen Songyong, Xu Xiangzhen, Li Yuan and Liu Fei, 2013. High–Cr and high–Al chromitite found in western Yarlung–Zangbo suture zone in Tibet. Acta Petrologica Sinica, 29: 1878–1908 (in Chinese with English abstract).
- Xiong Fahui, Yang Jingsui, Robinson, P.T., Gao Jian, Zhang Lan, Chen Yanhong and Lai Shengmin, 2017. Geochronology and geochemistry of the magmatic rocks from Zedong ophiolite, eastern Yarlung–Zangbo suture zone, Tibet. Acta Geologica Sinica (English Edition), 91(S1): 10–11.
- Xiong, Q., Griffin, W.L., Zheng, J.P., O'Reilly, S.Y., Pearson, N.J., Xu, B., and Belousova, E.A., 2016. Southward trench migration at ∼130–120 Ma caused accretion of the Neo–Tethyan forearc lithosphere in Tibetan ophiolites. Earth and Planetary Science Letters, 438: 57–65.
- Xu Xiangzhen, Yang Jingsui, Ba Dengzhu, Chen Songyong, Fang Qingsong and Bai Wenji, 2008. Diamond discovered from the Kangjinla chromitite in the Yarlung Zangbo ophiolite belt, Tibet. Acta Petrologica Sinica, 24: 1453–1462 (in Chinese with English abstract).
- Xu, X.Z., Yang, J.S., Ba, D.Z., Guo, G.L., Robinson, P.T., and Li, J.Y., 2011. Petrogenesis of the Kangjinla peridotite in the Luobusa ophiolite, Southern Tibet. Journal of Asian Earth Sciences, 42: 553–568.
- Xu Xiangzhen, Yang Jingsui, Xiong Fahui and Ba Dengzhu, 2016. Zircon SHRIMP U–Pb Age of the Mantle Peridotite in the Kangjinla Chromite Deposit, Tibet and Its Geological Significance. Acta Geologica Sinica. 90(11): 3215–3226 (in Chinese with English abstract).
- Xu, Y.G., Blusztajn, J., Ma, J.L., Suzuki, K., Liu, J.F., and Hart, S.R., 2008. Late Archean to Early Proterozoic lithospheric mantle beneath the western North China Craton: Sr–Nd–Os isotopes of peridotite xenoliths from Yangyuan and Fansi. Lithos, 102: 25–42.
- Yang, J.S., Robinson, P.T., and Dilek, Y., 2014. Diamonds in ophiolites: A little – known diamond occurrence. Elements, 10: 123–126.
- Zhang, C., Liu, C.Z., Wu, F.Y., Zhang, L.L., and Ji, W.Q., 2015. Geochemistry and geochronology of mafic rocks from the Luobusa ophiolite, South Tibet. Lithos, 245: 93–108.
- Zhang, H.F., Goldstein, S., Zhou, X.H., Sun, M., Zheng, J.P., and Cai, Y., 2008. Evolution of subcontinental lithospheric mantle beneath eastern China: Re–Os isotopic evidence from mantle xenoliths in Paleozoic kimberlites and Mesozoic basalts. Contrib. Miner. Journal of Petrology, 155: 271–293.
- Zhang, H.F., Goldstein, S.L., Zhou, X.H., Sun, M., and Cai, Y., 2009. Comprehensive refertilization of lithospheric mantle beneath the North China Craton: further Os–Sr–Nd isotopic constraints. Journal of the Geological Society, 166: 249–259.
- Zhou, M.F., Robinson, P.T., Malpas, J., and Li, Z., 1996. Podiform chromitites in the Luobusa ophiolite (Southern Tibet): implications for melt–rock interaction and chromite segregation in the upper mantle. Journal of Petrology, 37: 3–21.
- Zhou, M.F., Robinson, P.T., Malpas, J., Edwards, S.J., and Qi, L., 2005. REE and PGE geochemical constraints on the formation of dunites in the Luobusa ophiolite, southern Tibet. Journal of Petrology, 46: 615–639.
- Zyabrev, S.V., Aitchison, J.C., Badengzhu, Davis, A.M., Luo, H., and Malpas, J., 1999. Radiolarian biostratigraphy of supra–ophiolite sequences in the Xigaze area, Yarlung Tsangpo suture, southern Tibet (preliminary report). Radiolaria, 17: 13–19.
