Volume 94, Issue 1 pp. 38-56
Original Article
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Discovery of Cosmic Spherules from the Mesoproterozoic Strata and its Significance—in Case of the Ming Tombs Area, Beijing

Tianrui SONG

Tianrui SONG

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Ning ZHENG

Corresponding Author

Ning ZHENG

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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

Yongqing LIU

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Hongwei KUANG

Hongwei KUANG

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Nan PENG

Nan PENG

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Chao LI

Chao LI

National Research Center of Geoanalysis, Beijing, 100037 China

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Jigang TANG

Jigang TANG

Beijing General Research Institute of Mining and Metallurgy, Beijing, 100044 China

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Qinggao YAN

Qinggao YAN

Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650093 Yunnan, China

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Linzhi GAO

Linzhi GAO

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Zhicai ZHU

Zhicai ZHU

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Xiaoxu XIA

Xiaoxu XIA

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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Yuchong WANG

Yuchong WANG

Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 China

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First published: 22 July 2019
Citations: 2

About the first author:

SONG Tianrui, male, born in 1931 in Taiyuan City, Shanxi Province; bachelor; graduated from Peking University; research fellow and doctoral supervisor of Institute of Geology, Chinese Academy of Geological Sciences. He is now interested in the study on mineralogy, petrology, and sedimentology. Email: [email protected]; phone: 010-68999695, 13071159485.

About the corresponding author:

ZHENG Ning, female, born in 1983 in Panjin City, Liaoning Province; doctor; graduated from Chinese Academy of Geological Sciences; research assistant at the Institute of Geology, Chinese Academy of Geological Sciences. She is now interested in the study on sedimentology. Email: [email protected]; phone: 010-68999726, 15210019969.

Abstract

This study covers cosmic spherules derived from the Mesoproterozoic Dahongyu Formation in the Ming Tombs area, Beijing. The cosmic spherules include iron oxide cosmic spherules, carbonaceous chondrites, and atomic iron “steely bead”-shaped cosmic spherules. The mineral assemblage of silicon carbide, forsterite, zircon, and glass spherules and fragments were picked from melt-silicified carbonate of the Mesoproterozoic Dahongyu Formation (ca. 1625 Ma). Cosmic spherule assemblages are solely discovered from sedimentary rocks in China. Platinum group elements (PGE) were determined for the first time in cosmic spherules and associated minerals. PGE comparative observation between meteorite and cosmic spherules is presented in this study. It is recognized that an extraterrestrial meteorite impact event might have occurred in the Dahongyu Stage. The main evidence is a large number of iron cosmic spherules in silicified oncolitic limestone, and associated cosmic silicon carbide, glass spherules, and fragments, as well as the presence of forsterite. The impact-volcanic crater is characteristic of a big black shale block dropped into the bended silicified limestone.

 

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