Onset timing of left-lateral movement along the Ailao Shan-Red River Shear Zone: 40Ar/39Ar dating constraint from the Nam Dinh Area, northeastern Vietnam

Pei Ling Wang*, Ching Hua Lo, Sun Lin Chung, Tung Yi Lee, Ching Ying Lan, Trang Van Thang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

112 引文 斯高帕斯(Scopus)

摘要

Left-lateral motion along the Ailao Shan-Red River (ASRR) Shear Zone has been widely advocated to be the result of the collision between the Indian and Eurasian plates and to account for sea-floor spreading in the South China Sea. Our new 40Ar/39Ar data on the south-easternmost outcrop of the Day Nui Con Voi metamorphic massif, northern Vietnam, suggest that the exhumation of metamorphic massif by shearing along the ASRR zone began ~27 Ma and lasted until ~22 Ma. A perfect correlation between location and cooling path for the samples along the shear zone suggests that the transtensional deformation may have propagated northwestward at a rate of ~6 cm y-1. Such a good correlation also indicates that the onset of the left-lateral movement of the shear zone may have occurred later than ~27.5 Ma. This conclusion is consistent with our previous interpretation that collision-induced southeastward extrusion of Indochina along the ASRR Shear Zone postdates the opening of the South China Sea, and that extrusion tectonics in SE China may not be responsible for the opening of the South China Sea. (C) 2000 Elsevier Science Ltd. All rights reserved.

原文英語
頁(從 - 到)281-292
頁數12
期刊Journal of Asian Earth Sciences
18
發行號3
DOIs
出版狀態已發佈 - 2000 六月 1

ASJC Scopus subject areas

  • 地質學
  • 地表過程

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