The contribution of the Emeishan large igneous province to the strontium isotope evolution of the Capitanian seawater

被引:9
作者
Huang, Hu [1 ,2 ]
Hou, Mingcai [1 ]
Qing, Hairuo [3 ]
Zhou, Lian [4 ]
Yang, Jianghai [2 ]
Du, Yuansheng [2 ]
Tian, Jingchun [1 ]
Ni, Shijun [1 ]
Xiong, Fuhao [1 ]
机构
[1] Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China
[2] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan, Hubei, Peoples R China
[3] Univ Regina, Dept Geol, Regina, SK, Canada
[4] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Hubei, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Emeishan large igneous province; Sr isotope; Capitanian; limestones; RIVERINE PARTICULATE MATERIAL; PERMIAN-TRIASSIC BOUNDARY; SW CHINA; SR-ISOTOPE; SR-87/SR-86; STRATIGRAPHY; WEATHERING RATES; SOUTHWEST CHINA; FLOOD VOLCANISM; MASS EXTINCTION; ASH BEDS;
D O I
10.1080/00206814.2019.1571448
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
The Sr-87/Sr-86 minimum of the Capitanian seawater is one of the most significant features in the Phanerozoic seawater Sr-87/Sr-86 history. In order to assess possible contribution of the Emeishan large igneous provinces (LIPs) to strontium isotope evolution of the Capitanian seawater, Sr-87/Sr-86 ratios were measured from the Capitanian limestones which are locally interlayered with the Emeishan basalts. The limestones underlying the Emeishan basalts have high Sr-87/Sr-86 ratios (0.7070-0.7074). However, extremely low Sr-87/Sr-86 ratios (0.7068-0.7070) were identified in the late Capitanian Jinogondolella prexuanhanensis-J. xuanhanensis zones, which correspond to the eruption time of the Emeishan LIP. The temporal coincidence of these two phenomena supports the idea of a potential linkage between Capitanian Sr-87/Sr-86 minimum and eruption of this igneous province. The strong submarine hydrothermal activity and erosion of the Emeishan LIP could have released large amounts of non-radiogenic Sr to the oceans and play an important role in strontium isotope evolution of the seawater. [GRAPHICS] .
引用
收藏
页码:1927 / 1939
页数:13
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