中国三叠纪古地势图  

Palaeotopographic map of the Triassic of China

作　　者：张旗[1] 焦守涛[2] 吴浩若[1] 金惟俊[1] 李承东[3] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]中国地质调查局天津地质矿产研究所,天津300170

出　　处：《古地理学报》2013年第2期181-202,共22页Journal of Palaeogeography：Chinese Edition

基　　金：国家自然科学基金重大研究计划(编号:91014001)资助

摘　　要：古地势图主要恢复地质历史时期的地势分布,高地指示厚的地壳,而低地表明为正常厚度地壳或薄的地壳。中国三叠纪古地势图主要是根据不同类型花岗岩、金铜钨锡等矿床及古地理资料编制而成的。编图的结果表明,三叠纪中国可能存在 5 个高地,即: 华北高原、北山山脉、羌塘—秦岭山脉、龙门山山脉和湖南山地。三叠纪的东北、北疆、华北和华南则为低地。研究表明,上述高地主要发育在晚三叠世,是陆块挤压碰撞的产物,表明晚三叠世的印支运动可能是中国大陆拼合的最重要时期。编图的结果表明,文中提出的关于古地势图编图的理论和方法是可行的。另外,文中还讨论了编图中存在的问题及进一步研究的建议。Palaeotopographic maps are aimed to recover topographic distributions.Highland indicates the thickened crust,whereas lowland means normal or thinned crust. The Triassic palaeotopographic map of China is compiled based on a set of data in different types of granite,AuCuWSn deposits and palaeogeographic maps.The compiled map shows that five highlands may have existed in the Triassic,including the North China Plateau,the Beishan Mountains,the Qiangtang-Qinling Mountains,the Longmenshan Mountains and Hunan subPlateau,and the lowlands may occur in Northeast China,northern Xinjiang,North China and South China.The highlands are consistent with largescaled continental collision in the Late Triassic Indosinian Movement,a crucial stage of continental assemblage in China.The theory and method of compilation on palaeotopographic maps seem to be applicable but have some problems that need to be further worked.

关 键 词：古地势图 三叠纪 中国 花岗岩 矿床 古地理图 

分 类 号：P534.51[天文地球—古生物学与地层学]