中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 中国科学院新生代地质与环境重点实验室
Deciphering a mantle degassing transect related with India-Asia continental convergence from the perspective of volatile origin and outgassing

文献类型：期刊论文

作者Zhang, Maoliang1; Xu, Sheng1; Zhou, Xiaocheng2; Caracausi, Antonio3; Sano, Yuji1,4,7; Guo, Zhengfu5; Zheng, Guodong6; Lang, Yun-Chao1; Liu, Cong-Qiang1
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2021-10-01
卷号310页码:61-78
关键词Mantle degassing Geochemistry Continental convergence Quaternary volcanism Neotectonic activity Southeastern Tibetan Plateau
ISSN号0016-7037
DOI10.1016/j.gca.2021.07.010
英文摘要Mantle degassing transect across different tectonic units within a plate convergent setting has been well documented for oceanic convergent margins by systematic changes in geochemistry (e.g., He-3/He-4, delta C-13, and CO2/He-3) of hydrothermal gases. However, little is known about spatial variations in volatile geochemistry across a continental convergent margin. In this study, we identify a mantle degassing transect in the southeastern Tibetan Plateau using He-CO2 systematics of hydrothermal gases, which extends from India-Asia continental convergent margin to intra-continent extensional region. delta C-13-CO2 (-11.8 parts per thousand to -3.1 parts per thousand) and CO2/He-3 (1.7 x 10(8) to 7.1 x 10(11)) values of hydrothermal gases show large variations that are consistent with modification by secondary physico-chemical processes, such as multi-component mixing, hydrothermal degassing, and calcite precipitation. Three levels of He degassing can be recognized based on He-3/He-4 dataset (0.01-5.87 RA) of the hydrothermal gas samples and their distances to volcanic centers. A magmatic level He degassing (35-74% mantle He) is found near active and/or Quaternary volcanoes fed by mantle-derived magmas. With increasing distance to volcanic centers, the outgassed magmatic volatiles are gradually diluted by crustal components (e.g., radiogenic He-4), defining a transitional level He degassing (13-33% mantle He). The He-3/He-4 values (8.16-8.48 (RA)) of olivine phenocrysts indicate a MORB (mid-ocean ridge basalts)-type mantle source for the magmatic and transitional levels of He degassing that are localized in Quaternary volcanic fields. In contrast, a background level He degassing (<12% mantle He) dominates the entire study area, and can be attributed to (i) degassing of sub-continental lithospheric mantle, and/or (ii) higher degrees of crustal contamination than those of the transitional level He degassing near volcanic centers. Combined with olivine He-3/He-4 data reported in this study and whole-rock Sr-87/Sr-86 data of host basalts from literature, source components of the mantle-derived magmas are suggested to include the MORB-type convective mantle, subducted Indian slab materials, and less degassed mantle materials, which can account for the possible decoupling between He and Sr isotope systematics. These findings delineate the origin and outgassing of mantle volatiles controlled by the India-Asia continental convergence, and would contribute to a better understanding of the deeply-sourced volatile emissions in these tectonic settings. (C) 2021 Elsevier Ltd. All rights reserved.
WOS关键词TENGCHONG VOLCANIC FIELD ; CARBON-ISOTOPE SYSTEMATICS ; REHAI GEOTHERMAL-FIELD ; YUNNAN PROVINCE ; MAGMA GENESIS ; SE TIBET ; GEOGRAPHICAL-DISTRIBUTION ; CRUSTAL STRUCTURE ; GAS GEOCHEMISTRY ; CO2 EMISSIONS
资助项目National Natural Science Foundation of China[41930642] ; National Natural Science Foundation of China[42072327] ; National Natural Science Foundation of China[41673106] ; China Seismic Experimental Site (CSES)[2019CSES0104] ; National Key Research and Development Program of China[2020YFA0607700] ; National Key Research and Development Program of China[2017YFC1500501] ; United Laboratory of High-Pressure Physics and Earthquake Science[2019HPPES02] ; Strategic Priority Research Program (B) of Chinese Academy of Sciences[XDB26000000]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000689517700005
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Seismic Experimental Site (CSES) ; China Seismic Experimental Site (CSES) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; United Laboratory of High-Pressure Physics and Earthquake Science ; United Laboratory of High-Pressure Physics and Earthquake Science ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Seismic Experimental Site (CSES) ; China Seismic Experimental Site (CSES) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; United Laboratory of High-Pressure Physics and Earthquake Science ; United Laboratory of High-Pressure Physics and Earthquake Science ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Seismic Experimental Site (CSES) ; China Seismic Experimental Site (CSES) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; United Laboratory of High-Pressure Physics and Earthquake Science ; United Laboratory of High-Pressure Physics and Earthquake Science ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Seismic Experimental Site (CSES) ; China Seismic Experimental Site (CSES) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; United Laboratory of High-Pressure Physics and Earthquake Science ; United Laboratory of High-Pressure Physics and Earthquake Science ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/102598]  
专题地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者Xu, Sheng; Zhou, Xiaocheng
作者单位1.Tianjin Univ, Sch Earth Syst Sci, Inst Surface Earth Syst Sci, Tianjin 300072, Peoples R China
2.China Earthquake Adm, Inst Earthquake Forecasting, Beijing 100036, Peoples R China
3.Ist Nazl Geofis & Vulcanol, Sez Palermo, I-90146 Palermo, Italy
4.Univ Tokyo, Atmosphere & Ocean Res Inst, Kashiwa, Chiba 2778564, Japan
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
6.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
7.Kochi Univ, Ctr Adv Marine Core Res, Kochi 7838502, Japan
推荐引用方式
GB/T 7714		 Zhang, Maoliang,Xu, Sheng,Zhou, Xiaocheng,et al. Deciphering a mantle degassing transect related with India-Asia continental convergence from the perspective of volatile origin and outgassing[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2021,310:61-78.
APA Zhang, Maoliang.,Xu, Sheng.,Zhou, Xiaocheng.,Caracausi, Antonio.,Sano, Yuji.,...&Liu, Cong-Qiang.(2021).Deciphering a mantle degassing transect related with India-Asia continental convergence from the perspective of volatile origin and outgassing.GEOCHIMICA ET COSMOCHIMICA ACTA,310,61-78.
MLA Zhang, Maoliang,et al."Deciphering a mantle degassing transect related with India-Asia continental convergence from the perspective of volatile origin and outgassing".GEOCHIMICA ET COSMOCHIMICA ACTA 310(2021):61-78.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。