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Pull-apart Basins and the Total Lateral Displacement Along the Haiyuan Fault Zone in Cenozoic
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作者 Tian Qinjian, Ding Guoyu, and Shen XuhuiCenter for Analysis and Prediction, China Seismological Bureau, Beijing 100036, China 《Earthquake Research in China》 2001年第4期390-398,共9页
Pull-apart basins of three scales were found along the Haiyuan fault zone. The largest one is more than 50km long, named Laolongwan basin developed in Miocene. A model was built to calculate the amount of pull-apart o... Pull-apart basins of three scales were found along the Haiyuan fault zone. The largest one is more than 50km long, named Laolongwan basin developed in Miocene. A model was built to calculate the amount of pull-apart of an extensional basin. Parameters used in calculation include thickness and length of deposition and depth of detachment. The results of calculation show that the amount of pull-apart of the Laolongwan Basin is about 30 km. Based on previous studies and calculating by using the average slip rate method, amount of pull-apart of the other two smaller basins are 22 km and 8 km, respectively. Thus, the total displacement of strike-slip along the Haiyuan fault zone is about 60 km, which is close to the offset of the Yellow River from Jingtai to Jingyuan. 展开更多
关键词 lateral displacement pull-apart basin haiyuan fault zone
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拉分盆地与海原断裂带新生代水平位移规模 被引量:11
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作者 田勤俭 丁国瑜 申旭辉 《中国地震》 CSCD 北大核心 2001年第2期167-175,共9页
沿海原断裂带发育 3个级别的拉分盆地 ,其中 ,发育于中新世的老龙湾盆地是规模最大的拉分盆地 ,长度超过 5 0km。为了估计盆地拉分量 ,本文建立了数学模型 ,相关参数包括盆地沉积厚度、盆地长度、滑脱面深度等。计算得到老龙湾盆地的拉... 沿海原断裂带发育 3个级别的拉分盆地 ,其中 ,发育于中新世的老龙湾盆地是规模最大的拉分盆地 ,长度超过 5 0km。为了估计盆地拉分量 ,本文建立了数学模型 ,相关参数包括盆地沉积厚度、盆地长度、滑脱面深度等。计算得到老龙湾盆地的拉分量为 30km。对于另外两个较小规模的拉分盆地 ,本文利用前人资料和平均走滑速率方法得到盆地拉分量分别为 2 2km和 8km。这样 ,沿海原断裂带新生代以来的拉分总量约 60km。该数值与景泰至靖远的黄河位错量接近。 展开更多
关键词 水平位移 拉分盆地 海原断裂带 数学模型 新生代
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