从梵净山“飞来峰”到兰田构造窗──对江南一雪峰推（滑）体的若干认识  

FANJINGSAN“KLIPPE”AND LANT1AN TECTONIC WINDOW──VIEWS ON THE NANGNAN一XUEFENG NAPPE

作　　者：丘元禧[1] 

机构地区：[1]中山大学地质系

出　　处：《安徽地质》1994年第Z1期23-26,共4页Geology of Anhui

基　　金：国家自然科学基金

摘　　要：本文根据近十年的研究工作从大量的１：２０万、１：５万区调和钻孔资料证明：梵净山“飞来峰”是不存在的，黔东南南明地区是一个向斜盆地而不是构造窗。通过实地考察认为：皖南兰田是否为构造窗也尚难定论。江南一雪峰古陆内确实存在推（滑）覆构造，但这些都是准原地型的，其推（滑）距离不大，均未超过５０ｋｍ，并未改变扬子地块东南边缘区域沉积古地理和沉积相的总体展布格局。本区并不存在阿尔卑斯型或阿巴拉契型的远程推（滑）覆体，江南一雪峰古陆并非来自华夏古陆。扬子地块的逆掩推覆或重力滑覆是属于陆内俯冲和板内挤压或伸展性质的，这与两个大陆、两大板块之间的碰撞是不能同日而语的。ResuIts of l:200,000 and I:50.000 scale regional geologial survey and large amounts of boreholedata support that the Fanjingshan “klippe”does not exist and the Nanming region , Southeastern Guizhou , is a synclinalbesin,not a tectonic window。Through field obeervation,the author holds that it is stiII Ilard to determine whether or notatectonic window exists in the tuntinn area.South Anhui,but it is certain that there are nappe structures in the Jiangnan一Xuefeng ancient land. They are parautochthonous nappes , with short displacement of less than 50km,which did notbring much change to the overall extension pattern of the regional sedimentary paleogeography and sedimentary facies inthe mar8inal area of Southeastern Yangtze landmass。 In the studicri area , distant nappes of Alpine type or Appalachiantype do not exist, and the Jiangnan一Xuefeng ancient land is not derived from the Cathaysia,Thrust or gravlty slidingstructures in the YangtZe landmass are of characteristics of intracontinental sutx1uction and in traplate compression or extension,quite different from the collision of two continents or plates。

关 键 词：梵净山“飞来峰” 兰田构造窗 推(滑)覆构造 板内挤压 陆内俯冲 江南一雪峰古陆 

分 类 号：P54[天文地球—构造地质学]