Tectonic framework and evolution of southeastern China

摘要: Abstract In southeastern China, four collision orogenic belts, formed in different geological times, have been recognized. The first is a part of the Circum-Yangtze Jinningide, composed Yangtze foreland fold-thrust belt, Shexian melange zone, Shuangxiwu arc, Chencai zone and overriding blocks. It continent-arc-continent collision. event occurred at about 900 Ma. second Paleozoic orogen, comprising Central Hunan southern Jiangxi Wuyishan backarc Dikou basement end Early Silurian. third an Indosinian which northwestern Zhejiang southwestern Fujian belts Hexi found, but other units are covered or missing. fourth Coast Belt outcrops I-type granites found. metamorphic ages ranged from 110 to 90 may Cretaceous. These constitute complex tectonic framework evolutionary history.