东天山巴里坤塔格磷灰石裂变径迹热年代学及构造意义  

Apatite Fission Track Thermochronology and Its Tectonic Significance in Balikuntage of Eastern Tianshan

作　　者：路宗悦 余心起[2] 张峰 胡军 王照翻 曾严 孙康 张伟[1,3] LU Zongyue;YU Xinqi;ZHANG Feng;HU Jun;WANG Zhaofan;ZENG Yan;SUN Kang;ZHANG Wei(Center for Geophysical Survey,China Geological Survey,Langfang 065000,Hebei,China;School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China;Technology Innovation Center for Earth Near Surface Detection,China Geological Survey,Langfang 065000,Hebei,China;Civil-Military Integration Center of China Geological Survey,Chengdu 610036,Sichuan,China;Haikou Marine Geological Investigation Center of China Geological Survey,Haikou 571127,Hainan,China;Wuhan Surveying-geotechnical Research Institute Co.,Ltd.of MCC,Wuhan 430080,Hubei,China)

机构地区：[1]中国地质调查局地球物理调查中心,河北廊坊065000 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]中国地质调查局地球浅地表探测技术创新中心,河北廊坊065000 [4]中国地质调查局军民融合地质调查中心,四川成都610036 [5]中国地质调查局海口海洋地质调查中心,海南海口571127 [6]中冶集团武汉勘察研究院有限公司,湖北武汉430080

出　　处：《大地构造与成矿学》2024年第4期690-697,共8页Geotectonica et Metallogenia

基　　金：中国地质调查局项目(DD20220988、DD20208017)资助。

摘　　要：通过对东天山巴里坤塔格4个磷灰石样品进行裂变径迹分析,以探讨该地区的构造演化特征。磷灰石裂变径迹的年龄在(50±3)Ma~(58±5)Ma之间,明显小于岩体的形成年龄,表明样品均经历了完全退火过程。样品的平均剥露速率为0.057 mm/a。热历史模拟结果显示,巴里坤塔格晚白垩世以来的构造抬升作用可划分为3个阶段:第1阶段(80~50 Ma)山体快速隆升,是晚白垩世(80~70 Ma)科希斯坦岛弧的增生作用和印度-欧亚板块的初始碰撞作用(~60 Ma)在该地区的响应;第2阶段(50~20 Ma)山体抬升缓慢;第3阶段(20 Ma至今)为第二次快速隆升时期,第2、3阶段均受控于印度板块和欧亚板块碰撞的远程效应。In this paper,we present the tectonic evolution characteristics of Balikuntage in Eastern Tianshan on the basis of apatite fission track thermochronological analysis.The apatite fission track ages of(50±3)Ma to(58±5)Ma are obviously younger than the formation age of the rock mass,indicating that the samples underwent complete annealing.The average uplift rate of the four samples was 0.057 mm/a.The tectonic uplift in Balikuntage since Late Cretaceous can be divided into three stages.In the first stage(80-50 Ma),the mountain rose rapidly,responding to the accretion of Kohistan-Dras island arc in the Late Cretaceous and the initial collision between the Indian and Eurasian plates.In the second stage(50-20 Ma),the mountain was slowly uplifted.The third stage,20 Ma to now,is the second rapid uplift period.The second and third stages were controlled by the far-range effects of the collision between the Indian and Eurasian plates.

关 键 词：磷灰石 裂变径迹 热历史模拟 巴里坤塔格 

分 类 号：P542[天文地球—构造地质学]