中国东北地区张广才岭中生代岩浆岩的性质与构造意义
Nature and tectonic implications of Mesozoic magmatic rocks in Zhangguangcai Ling(Mts.),Northeast China
李成强 1周建波 2王红燕 1陈卓 1李功宇1
作者信息
- 1. 吉林大学地球科学学院,长春 130061
- 2. 吉林大学地球科学学院,长春 130061;自然资源部东北亚矿产资源评价重点实验室(吉林大学),长春 130061
- 折叠
摘要
通过年代学和地球化学对比研究发现,中国东北张广才岭地区在晚古生代至早中生代的构造演化历史可以分为3个阶段:①晚二叠世—中三叠世(266～234 Ma),受黑龙江洋的西向俯冲影响,发育Ⅰ型花岗岩;②晚三叠世—早侏罗世(224～194 Ma),黑龙江洋闭合后佳木斯—兴凯地块和松辽地块碰撞拼贴,形成Ⅰ型和少量A型花岗岩;③早-中侏罗世(194～163 Ma),受到两地块碰撞-拼贴后的伸展作用及古太平洋的西向俯冲作用的综合影响,发育A2+Ⅰ型花岗岩.结合区域研究新进展,认为古亚洲洋向古太平洋转换发生在晚三叠—早侏罗世,黑龙江洋是连接二者转换的关键枢纽.
Abstract
During Late Paleozoic to Early Mesozoic,it was found that the tectonic evolutionary history of the Zhangguangcai Ling(Mts.)in Northeast China can be divided into 3 stages:① Late Permian-Middle Triassic(266-234 Ma),the westward subduction of Heilongjiang Ocean formed Ⅰ-type grantic rocks;② Late Triassic-Early Jurassic(224-194 Ma),the Jiamusi-Khanka Block and the Songliao Block collided after the closure of Hei-longjiang Ocean,forming Ⅰ-type with a few A-type granitic rocks;③ Early-Middle Jurassic(194-163 Ma),A2-type and Ⅰ-type granites were developed under the complex influence of the extensional environment after the colli-sion of the two blocks and the westward subduction of the Paleo-Pacific Ocean.Combined with new evolution on the Heilongjiang Complex and the Nadanhada Terrane,the authors consider that the transition between the Paleo-Asian Ocean and the Paleo-Pacific Ocean in eastern Eurasia occurred in the Late Triassic-Early Jurassic,and the Heilongjiang Ocean was an important hinge linking up the tectonic transition between these two domains.
关键词
花岗岩/岩浆期次/构造体制转换/古太平洋/晚古生代—早中生代/张广才岭Key words
granites/magmatic stage/tectonic transition/Paleo-Pacific Ocean/Late Paleozoic-Early Meso-zoic/Zhangguangcai Ling(Mts.)引用本文复制引用
基金项目
国家自然科学基金重点项目(42230303)
国家自然科学基金青年科学基金项目(42302236)
出版年
2024
NETL
NSTL
万方数据