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Heat flow study of the Emeishan large igneous province region: Implications for the geodynamics of the Emeishan mantle plume

Published on Jan 1, 2018in Tectonophysics2.76
· DOI :10.1016/j.tecto.2017.12.027
Qiang Jiang2
Estimated H-index: 2
(China University of Petroleum),
Nansheng Qiu4
Estimated H-index: 4
(China University of Petroleum),
Chuanqing Zhu1
Estimated H-index: 1
(China University of Petroleum)
Abstract
Abstract The Emeishan large igneous province (ELIP) is widely considered to be a consequence of a mantle plume. The supporting evidence includes rapid emplacement, voluminous flood basalt eruptions, and high mantle potential temperature estimates. Several studies have suggested that there was surface uplift prior to the eruption of the Emeishan flood basalts. Additionally, the plume's lateral extent is hard to constrain and has been variously estimated to be 800–1400 km in diameter. In this study, we analyzed present-day heat flow data and reconstructed the Permian paleo-heat flow using vitrinite reflectance and zircon (U-Th)/He thermochronology data in the ELIP region and discussed implications for the geodynamics of the Emeishan mantle plume. The present-day heat flow is higher in the inner and intermediate zones than in the outer zone, with a decrease of average heat flow from 76 mW/m2 to 51 mW/m2. Thermal history modeling results show that an abnormal high paleo-heat flow of 90–110 mW/m2 was caused by the Emeishan mantle plume activity. Based on the present-day heat flow data, we can calculate that there is lithospheric thinning in the central ELIP region, which may be due to the destruction of the lithosphere by mantle plume upwelling and magmatic underplating. The Permian paleo-heat flow anomaly implies that there was a temperature anomaly in the mantle. The ascending high-temperature mantle plume and the thinned lithosphere may have induced the large-scale uplift in the ELIP region. According to the range of the surface heat flow anomaly, it can be estimated that the diameter of the flattened head of the Emeishan mantle plume could have reached ~ 1600–1800 km. Our research provides new insights into the geodynamics of the Emeishan mantle plume through study of heat flow.
  • References (122)
  • Citations (5)
References122
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#1Chuanqing Zhu (China University of Petroleum)H-Index: 3
#2HUShengbiao (CAS: Chinese Academy of Sciences)H-Index: 17
Last.Shuai Liu (China University of Petroleum)H-Index: 1
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#1Chuanqing Zhu (China University of Petroleum)H-Index: 3
#2Nansheng Qiu (China University of Petroleum)H-Index: 13
Last.HUShengbiao (CAS: Chinese Academy of Sciences)H-Index: 17
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#1Yangfan Deng (CAS: Chinese Academy of Sciences)H-Index: 13
#2Yun Chen (CAS: Chinese Academy of Sciences)H-Index: 18
Last.José Badal (University of Zaragoza)H-Index: 21
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#1Yun Chen (CAS: Chinese Academy of Sciences)H-Index: 18
#2Yi-Gang Xu (CAS: Chinese Academy of Sciences)H-Index: 55
Last.Jiwen Teng (CAS: Chinese Academy of Sciences)H-Index: 27
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#1Zhu Chuan-Qing (China University of Petroleum)H-Index: 4
#2Qiu Nansheng (China University of Petroleum)H-Index: 5
Last.Zhang Shuo (China University of Petroleum)H-Index: 1
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#1Zezhong Zhang (Northwest University (United States))H-Index: 1
#2Jiangfeng Qin (Northwest University (United States))H-Index: 13
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#1Di Hu (CAS: Chinese Academy of Sciences)H-Index: 2
#2Yuntao Tian (SYSU: Sun Yat-sen University)H-Index: 15
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#1Ye Wang (China University of Petroleum)H-Index: 1
#2Nansheng Qiu (China University of Petroleum)H-Index: 13
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#1Qiuchen Xu (China University of Petroleum)H-Index: 1
#2Nansheng Qiu (China University of Petroleum)H-Index: 13
Last.Xiaofang Wang (CNPC: China National Petroleum Corporation)
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#1Wen Liu (China University of Petroleum)H-Index: 1
#2Nansheng Qiu (China University of Petroleum)H-Index: 13
Last.Yifeng Liu (NU: Nanjing University)H-Index: 1
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