地质学报（英文版）2007，Vol.81Issue(3)：385-397,13.
Mesoproterozoic Earthquake Events and Breakup of the Sino-Korean Plate
Mesoproterozoic Earthquake Events and Breakup of the Sino-Korean Plate
摘要
Abstract
In the Mesoproterozoic time, the northern part of the Sino-Korean Plate experienced a period of intensive tectonic extension and breakup. 1. An abundance of sedimentary earthquake records is preserved in the Chuanlinggou, Tuanshanzi and Gaoyuzhuang formations in the Mesoproterozoic Changcheng System (1800-1400 Ma) and in the Mesoproterozoic Wumishan Formation of the Jixian System (1400-1000 Ma). These earthquake records are characterized by various liquefied sand-veins, carbonate microspar and coarser spar veins, limestone dikes, liquefied breccia and various forms of liquefied contorted bedding. This deformation is always associated with synsedimentary faults and igneous activity. 2. Three liquefaction models for soft carbonate sediments are recognized, including liquefaction in laminated carbonate rocks, liquefaction in thin-bedded carbonates and large-scale liquefaction along huge carbonate dikes. 3. Based on the record of earthquake and volcanic activities, the Sino-Korean Plate experienced at least twice intraplate breakups. One occurred between 1800-1400 Ma, and the other occurred at about 1200 Ma. The last breakup resulted in formation of the Yan-Liao aulacogen, a tectonic zone characterized by deeper material vibrancy, active faults, major igneous activity and frequent earthquakes.关键词
earthquake events/Mesoproterozoic/Sino-Korean Plate/breakup intraplateKey words
earthquake events/Mesoproterozoic/Sino-Korean Plate/breakup intraplate分类
天文与地球科学引用本文复制引用
QIAO Xiufu,GAO Linzhi,PENG Yang..Mesoproterozoic Earthquake Events and Breakup of the Sino-Korean Plate[J].地质学报（英文版）,2007,81(3):385-397,13.基金项目
This study is supported by the Geological Project of CGS (Grant No.200313000055 and No. 1212010511607). （Grant No.200313000055 and No. 1212010511607）
