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Upwelling mantle plume and lithospheric delamination beneath the North China Craton
Physics of the Earth and Planetary Interiors ( IF 2.4 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.pepi.2020.106548
Chuansong He

Abstract Various models have been proposed for the destruction of the Eastern North China Craton (NCC); however, it is still a highly controversial scientific issue. In this study, abundant teleseismic data recorded by permanent and temporary stations in the NCC were collected, and P-wave tomography and common conversion point (CCP) stacking of receiver functions were performed. The results from this study reveal an upwelling mantle plume and a shallow Lehmann discontinuity (or the lower boundary of a low-velocity zone) beneath the Eastern NCC. Additionally, a large-scale, plate-like high-velocity anomaly is defined under the Eastern NCC that might be related to the delamination of a lithospheric keel. Based on the above results and assessment, NCC destruction might include two causes: lithospheric keel removal or delamination and mantle plume upwelling.

中文翻译:

华北克拉通下的上涌地幔柱和岩石圈分层

摘要 对于华北克拉通东部(NCC)的破坏,人们提出了多种模型;然而,这仍然是一个极具争议的科学问题。在这项研究中,收集了 NCC 永久和临时台站记录的大量远震数据,并进行了 P 波层析成像和接收器功能的公共转换点 (CCP) 叠加。这项研究的结果揭示了东部 NCC 下方的上升流地幔柱和浅 Lehmann 不连续性(或低速带的下边界)。此外,在东部 NCC 下定义了一个大尺度的板状高速异常,这可能与岩石圈龙骨的分层有关。根据以上结果和评估,NCC破坏可能包括两个原因:
更新日期:2020-09-01
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