北山北带地质构造特征  

THE CHARACTERISTICS OF GEOLOGICAL TECTONIC IN THE NORTH BELT OF BEISHAN

作　　者：李景春[1] 赵安生[1] 崔惠文[1] 

机构地区：[1]沈阳地质矿产研究所

出　　处：《贵金属地质》1996年第1期59-66,共8页

基　　金：国家科技攻关项目"甘肃北山火山岩地区金矿控矿条件和预测"课题研究内容的一部分.项目代号:90051-03-2.

摘　　要：甘肃北山地区主体属塔里木板块的北缘,其内部可划分出北、中、南三个构造带.北带主体为加里东期岛弧带.北山地区于古生代经历了弧一盆体制及裂陷槽的活动大陆边缘的发展,总体上经历了前寒武纪古陆壳形成阶段、加里东期岛弧及陆缘裂陷一闭合阶段、海西期岛弧期后构造一岩浆活动及陆壳再次裂陷一闭合阶段和中、新生代差异断块升降阶段.This paper proves that Beishan area belongs to Tarim plate north margin, and discusses evolutionary series of geological tectonics. Beishan area can be divided into three belt; north belt, intermediate belt, south belt. It can be divided in to four stages; forming ancient continental crust in Precambrian,island arc and rifting -closure within continental margin in Caledonian, tectono-magmatic activation succeeding as arc and second rifting-closure in Her-cynides, and fault block disparity elevator in Mesozoic-Cenozoic

关 键 词：北山北带 地质构造 甘肃 区域地质 

分 类 号：P562.42[天文地球—构造地质学]