古地理学报2017，Vol.19Issue(1)：117-128,12.DOI:10.7605/gdlxb.2017.01.009
河南南召盆地上三叠统太山庙组软沉积物变形构造及其古地理意义
Soft-sediment deformation structures from the Upper Triassic Taishanmiao Formation of the Nanzhao Basin in Henan Province and their palaeogeographic significances
摘要
Abstract
A lot of soft-sediment deformation structures,including synsedimentary faults,liquefied homogeneous layers and water escape veins, diapirs, plastic deformation, cataclasites and large load structures,occurred in the Upper Triassic Taishanmiao Formation of the Nanzhao Basin in Henan Prov-ince.They mainly cluster together in the middle part of deep lacustrine deposits,which is the transitional zone between the lower deep water and the upper shallow water.Most of the soft-sediment deformation structures are preserved in turbidites,except for the synsedimentary faults in shales.The major trigger mechanism of the soft-sediment deformation structures is the palaeoearthquake,although the depositional process of turbidite may play a role.The liquefied,plastic and brittle deformation structures are considered as the indicater of the high magnitude palaeoearthquake,which record the intense orogenic movements of the Qinling orogen during the Late Triassic.With the thrusting of the Qinling orogen,the Nanzhao Basin was uplifted,whereas the synchronous Jiyuan Basin, adjacent to the north, was subsided.They most likely represent the wedgetop depozone and the foredeep depozone of the foreland basin system respectively.关键词
软沉积物变形构造/古地震/南召盆地/秦岭造山带/晚三叠世/华北南缘古地理Key words
soft-sediment deformation structures/palaeoearthquake/Nanzhao Basin/Qinling oro-gen/Late Triassic/palaeogeography of southern North China Craton分类
天文与地球科学引用本文复制引用
杨文涛,王敏..河南南召盆地上三叠统太山庙组软沉积物变形构造及其古地理意义[J].古地理学报,2017,19(1):117-128,12.基金项目
国家自然科学基金项目（编号41440016）、国家自然科学基金青年科学基金（编号41502106）、河南理工大学博士基金（编号B2013－076）联合资助。［Co-funded by the National Natural Science Foundation of China （No．41440016），the Young Scientists Fund of National Natural Science Foundation of China （No．41502106），and the Doctor Foundation of Henan Polytechnic University （NoB2013－076）］ （）
