文献类型：期刊文献

英文题名：Onset timing and palaeoenvironmental records of Carnian Pluvial Episode (Late Triassic) in southwestern Guizhou, China

作者：Li, Shi-Xin Ma, Zhi-Heng Zhang, Xi Yang, Wei Zeng, Jian-Li Popa, Mihai Emilian Mao, Kai-Nan Zhang, Ting-Shan

第一作者：Li, Shi-Xin

通信作者：Zhang, TS[1]

机构：[1]PetroChina Daqing Oilfield Co Ltd, Chengdu Explorat & Dev Res Inst, Chengdu 610000, Peoples R China;[2]Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China;[3]China Geol Survey, Kunming Gen Survey, Nat Resources Ctr, Kunming 650000, Peoples R China;[4]Guizhou Inst Technol, Sch Resource & Environm Engn, Guiyang 550003, Peoples R China;[5]Univ Bucharest, Fac Geol & Geophys, Bucharest 010041, Romania

第一机构：PetroChina Daqing Oilfield Co Ltd, Chengdu Explorat & Dev Res Inst, Chengdu 610000, Peoples R China

通信机构：corresponding author), Southwest Petr Univ, Sch Geosci & Technol, Chengdu 610500, Peoples R China.

年份：2026

卷号：35

期号：1

外文期刊名：PALAEOWORLD

收录：;Scopus(收录号：2-s2.0-105027216252);WOS:【SCI-EXPANDED(收录号:WOS:001662864000001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 41972120, 42172129) , Guizhou Provincial Key Technology R&D Program [2023] GEN No. 167, No.168, and Foundation of State Key Laboratory of Karst Georesources and Environment (Guizhou University) (KST202501) . We gratefully acknowledge Wolfram M. Kurschner and another reviewer for their constructive, and pertinent comments that strengthened this paper.

语种：英文

外文关键词：Carnian Pluvial Episode; South China; Carbon isotope excursion; Redox proxies; Palaeosalinity; Terrigenous clastic input

摘要：The Carnian Pluvial Episode (CPE) in the Early Mesozoic was an extreme climate event that globally perturbed the Carbon cycle, significantly enhanced the hydrological cycle, and intensified ocean anoxia due to global warming, thereby exerting a significant influence on sedimentary environments. This study investigates the CPE in South China through integrated biostratigraphic, petrological, and geochemical analyses. Our findings of d13C records reveal a progressive increase from 1.71%o to 3.54%o and 1.53%o to 2.88%o in the lower to middle Julian 1 substage, followed by a major negative excursion from 2.91%o to 1.47%o and 2.88%o to 1.09%o in the late Julian 1 at the Yongning and the Wusha sections respectively. The d13C records from the two study sections generally correlate well with each other and are earlier than published records. Moreover, fluctuations observed in various redox proxies (U/Th, V/Cr, V/(V+Ni), Mo/Al) strongly coincide with d13C excursions during the late Julian 1 substage, pointing the marine environment shift from oxic to dysoxic/anoxic condition. While the carbonate platforms are overlain by deep-water anoxic facies at the Yongning section. Sr and Ba levels revealed a significant freshwater influx during the CPE, leading to oscillating decreases in palaeosalinity within the study area. In addition, recorded data for Al, Zr, Hf, Ti and Th suggest that the intensified continental weathering, resulted from a humid climate during the CPE, increased the terrigenous clastic input. (c) 2025 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights are reserved, including those for text and data mining, AI training, and similar technologies.