Volume 92, Issue 6 pp. 2136-2156
Original Article
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Geochemistry, Geochronology, and Hf isotopic Composition of the Late Paleoproterozoic Lujiapuzi Formation, NE Yan-Liao Rift, Northern Liaoning

Jin LIU

Jin LIU

School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275 Guangdong, China

Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510372 Guangdong, China

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Jian ZHANG

Corresponding Author

Jian ZHANG

School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275 Guangdong, China

Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510372 Guangdong, China

Corresponding author. E-mail: [email protected]Search for more papers by this author
Zhenghong LIU

Zhenghong LIU

College of Earth Sciences, Jilin University, Changchun 130061 Jilin, China

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Changqing YIN

Changqing YIN

School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275 Guangdong, China

Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510372 Guangdong, China

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Chen ZHAO

Chen ZHAO

School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275 Guangdong, China

Guangdong Provincal Key Lab of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510372 Guangdong, China

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Youbo PENG

Youbo PENG

Liaoning Survey Academy of Geology and Mineral Resources, Shenyang 110031 Liaoning, China

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Shiyong DOU

Shiyong DOU

Liaoning Survey Academy of Geology and Mineral Resources, Shenyang 110031 Liaoning, China

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Zhongjie YANG

Zhongjie YANG

Liaoning Survey Academy of Geology and Mineral Resources, Shenyang 110031 Liaoning, China

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First published: 27 December 2018

About the first author: LIU Jin, male; born in 1986 in Chongqing City; postdoctoral fellow of School of Earth Sciences and Engineering, Sun Yat-sen University. He is now work on regional geological survey and interested in the study on evolution of the North China Craton. Email: [email protected]; phone: 15942039295.

Abstract

The metasedimentary Lujiapuzi Formation crops out along the northeastern margin of the North China Craton, close to the Yan-Liao Rift. The age and tectonic setting of the formation, and its relationship with the Yan-Liao Rift are currently unclear. Here we present detrital zircon U-Pb ages, and Hf isotopic and geochemical data for the Lujiapuzi Formation to constrain the timing of deposition, the provenance of the formation, and the regional stratigraphy relationship. Zircon U-Pb dating constrains the timing of deposition of the Lujiapuzi Formation to younger than 1780 Ma, and indicates that most grains were sourced from the Longgang Block and the Paleoproterozoic Liao-Ji Belt. Detailed field investigations and a correlation of the regional stratigraphy reveal that much of the Lujiapuzi Formation is equivalent to the Tuanshanzi Formation in the Yan-Liao Rift; the lower section may represent the earliest sediments deposited within the Fanhe Basin. Based on these results and the findings of previous studies, we suggest that the base of the Changcheng System has an age of 1.80 Ga. Zircon Hf isotopic data indicate that the main period of crustal growth along the northeastern margin of the North China Craton occurred at 3.2–2.5 Ga, with a peak at 2.9–2.7 Ga.

 

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