Bo Chen

Nanjing University

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Shu‐zhong Shen

Nanjing University

Wenkun Qie

Nanjing Institute of Geology and Paleontology

Michael M. Joachimski

Friedrich-Alexander-Universität Erlangen-Nürnberg

Zhongping Ma

China Geological Survey

Kun Liang

Southwest University

Yunpeng Dong

State Key Laboratory of Continental Dynamics

Kai Weng

China Geological Survey

Jun Chen

Nanjing University

Xiangdong Wang

Nanjing University

Dong‐xun Yuan

China University of Mining and Technology

Cooperative Institutions

Chinese Academy of Sciences

Nanjing Institute of Geology and Paleontology

University of Chinese Academy of Sciences

Cambrian Innovation (United States)

Nanjing University

University of Science and Technology of China

China University of Geosciences

State Key Laboratory of Palaeobiology and Stratigraphy

Peking University

Institute of Geology and Geophysics

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LOWER DEVONIAN CONODONTS FROM THE NAGAOLING FORMATION OF THE DASHATIAN SECTION NEAR NANNING,GUANGXI,SOUTH CHINA

Chengyuan Wang Bo Chen Kuang Guodun

Devonian

Section (typography)

Conodont

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Carbonate U-Pb Geochronology and Clumped Isotope Constraints on the Origin of Hydrothermal Dolomites: A Case Study in the Middle Permian Qixia Formation, Sichuan Basin, South China

Minerals (2023)

Yu Zou Donghua You Bo Chen Yang Hua-min Zhixing Tian

Reservoirs in the dolomites of the Middle Permian Qixia Formation in the Sichuan Basin are currently important oil and gas exploration objects in China. However, the questions concerning the sources of the dolomitized fluids and the control factors of the Qixia hydrothermal dolomites remain unclear. In this study, the original hydrothermal dolomites (the replacement dolomites (RDs) and saddle dolomites (SDs)) from the Qixia Formation in the southwestern Sichuan Basin (the PR1 well and Baoxing section) were mainly examined using novel in situ carbonate U-Pb dating with clumped isotopes (∆47). Our results show that the U-Pb ages of the latest SDs from the PR1 well (located in the middle zone of the Emeishan large igneous province (ELIP) and distanced from the Orogenic Belt of Longmenshan) are 257.9–251.0 Ma, coincident with the period of main activity of the ELIP. Combined with the previous U-Pb dating, we propose that the high-temperature T∆47 (82.2–108.4 °C and 127.5–205.9 °C) recorded for SDs from the PR1 well and Baoxing section may have responded to ELIP activity and Longmenshan orogeny activity, respectively. In addition, in the entire southwestern Sichuan Basin, the RDs and SDs yield similar δ13C and δ18O values, indicating that the dolomites were formed by hydrothermal fluids of similar sources, with marine hydrothermal fluids being a highly possible source. Finally, this study proposes a new hydrothermal dolomite genesis model for the Qixia Formation, emphasizing that the formation of hydrothermal dolomites mainly depends on the proximity to tectonic thermal events in space and time.

Geochronology

10.3390/min13020223

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Citations (1)

Devonian-Carboniferous boundary in China

Palaeobiodiversity and Palaeoenvironments (2021)

Wenkun Qie Yuanlin Sun Wen Guo Ting Nie Bo Chen

Devonian

Late Devonian extinction

Marine transgression

Conodont

10.1007/s12549-021-00494-z

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Citations (22)

Progress, problems and prospects: An overview of the Guadalupian Series of South China and North America

Earth-Science Reviews (2020)

Shu‐zhong Shen Dong‐xun Yuan Charles M. Henderson Qiong Wu Yichun Zhang

Conodont

Diachronous

Large igneous province

Chronostratigraphy

Geochronology

Excursion

10.1016/j.earscirev.2020.103412

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Citations (53)

Permian integrative stratigraphy and timescale of China

Science China Earth Sciences (2018)

Shu‐zhong Shen Hua Zhang Yichun Zhang Dong‐xun Yuan Bo Chen

Conodont

Permian–Triassic extinction event

10.1007/s11430-017-9228-4

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Citations (189)

Sedimentary Environment Research for Xujiahe Formation of the Upper Triassic Series in Sichuan Basin

Journal of Chongqing University of Science and Technology (2010)

Bo Chen

According to the research,the view can be concluded that the facies of the upper triassic Xujiahe formation may mainly have wetlands fan,River-delta and lakes,etc. The early late Triassic,western areas of Sichuan basin was Marine deposits,east areas was mainly Marine delta environment. With the slow uplift of Longmenshan island chain,the sea-basin gradually turned into land-basin. In Xu-2,4,6,the filling degree is more than the settlement,at the rim of the basin is mainly delta plain,the inner basin is mainly shallow lake basin; in Xu-3,5,the basin is flooding plain and shallow lake-semi-deep lake deposition by enlargement of lake basin area and reduction of source. The Xu-1,2 are mainly producing formations in Xujiahe formation,by the sand-body with wide distribution,thinkness stability,the higher maturity of composition and structure. The results indicate that the Xu-2,4 sandstones are mainly delta front distributary channel and mouth bar,after the some or total transformation of waves and lake streams,they form overlays by the multiple delta front sand bar and shore sand shoal,and with the migration of shoreline and eventually throughout the entire basin.

Shoal

Mouth bar

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Citations (6)

A high-resolution Middle to Late Permian paleotemperature curve reconstructed using oxygen isotopes of well-preserved brachiopod shells

Earth and Planetary Science Letters (2020)

Wen-qian Wang Claudio Garbelli Feifei Zhang Quan-feng Zheng Yichun Zhang

Conodont

Permian–Triassic extinction event

Large igneous province

δ18O