藏北比如县玛双布上三叠统波里拉组震积事件沉积的发现及意义

藏北比如县玛双布上三叠统波里拉组震积事件沉积的发现及意义

李尚林¹，王根厚²，马伯永³，杨文瑞²，赵文涛^2，4，廖蕾^2，4

1.国土资源部实物地质资料中心，北京 101149;2.中国地质大学地球科学与资源学院，北京 100083;3.中国地质图书馆，北京 100083;4.内蒙古地质调查院，呼和浩特 010020

收稿日期:2008-03-28 修回日期:1900-01-01 出版日期:2008-11-26 发布日期:2008-11-26
通讯作者: 李尚林

Discovery and Its Significance of Earthquake Event Deposits of the Upper Triassic Bolila Formation in Mashuangbu, Biru County, Northern Tibet

LI Shang-lin¹，WANG Gen-hou²，MA Bo-yong³，YANG Wen-rui²，ZHAO Wen-tao^2,4，LIAO Lei^2，4

1.National Geological Samples Center, The Ministry of Land and Resources, Beijing 101149, China;2.Faculty of Earth Science and Resource, China University of Geosciences, Beijing 100083, China;3.China Geological Library, Beijing 100083, China;4.Inner Mongolia Institute of Geological Survey, Hohhot 010020, China

Received:2008-03-28 Revised:1900-01-01 Online:2008-11-26 Published:2008-11-26
Contact: LI Shang-lin

摘要/Abstract

摘要： 藏北比如县玛双布上三叠统波里拉组发育震积岩(A)、海啸岩(B)及背景沉积(C)3个沉积单元。它们组成A-B-C， A-C，B-C等3种类型的沉积序列。这些沉积序列分别代表地震-海啸-背景沉积(地震引发海啸)、地震-背景沉积(地震未引发海啸)、海啸-背景沉积(远离地震中心)的事件沉积序列。波里拉组地震事件沉积是特提斯洋进一步扩张的前兆和裂解的标志，也是劳亚-泛华夏大陆裂解的响应。

关键词: 藏北比如县, 震积岩, 海啸岩, 特提斯洋, 波里拉组

Abstract: Seinites, tsunamites and background deposits occur in the Upper Triassic Bolila Formation in Nanyaxiang Mashuangbu, Biru County, North Tibet. They are composed of three distinct sedimentary sequences: A-B-C, A-C and B-C, representing an event sedimentary sequence of earthquake-tsunami-background deposits, earthquake and background deposits(no tsunami occurring) and tsunami-background deposits(far from the center of earthquake) respectively. Earthquake event deposits in the Bolila Formation are not only the auspice of the further extension, splitting and separation of the Tethyan ocean, but also sedimentary response to the Laurasia land-Cathaysia splitting.

Key words: Biru County, northern Tibet, seismites, tsunamites, Tethyan Ocean, Bolila Formation

中图分类号:

P539.1

李尚林，王根厚，马伯永，杨文瑞，赵文涛，廖蕾. 藏北比如县玛双布上三叠统波里拉组震积事件沉积的发现及意义[J]. J4, 2008, 38(6): 973-0979.

LI Shang-lin，WANG Gen-hou，MA Bo-yong，YANG Wen-rui，ZHAO Wen-tao，LIAO Lei. Discovery and Its Significance of Earthquake Event Deposits of the Upper Triassic Bolila Formation in Mashuangbu, Biru County, Northern Tibet[J]. J4, 2008, 38(6): 973-0979.

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