塔里木盆地中、新生代“热”岩石圈厚度演化  

Mesozoic and Cenozoic“thermal”lithospheric thickness evolution in the Tarim basin

作　　者：左银辉[1,2] 李佳蔚[3] 李文正 郝情情 

机构地区：[1]“油气藏地质与开发工程”成都理工大学,成都610059 [2]成都理工大学能源学院,成都610059 [3]中国科学院地质与地球物理研究所,岩石圈演化实验室,北京100029 [4]中国石油杭州地质研究所,杭州310023 [5]中国冶金地质总局矿产资源研究院,北京100025

出　　处：《地球物理学进展》2015年第4期1608-1615,共8页Progress in Geophysics

基　　金：国家自然科学基金项目(41402219,41125010,91114202)资助

摘　　要：本文以浅部沉积盆地热历史为基础,结合地热学的相关理论计算了塔里木盆地主要地质时期的＂热＂岩石圈厚度.研究表明,塔里木盆地中、新生代岩石圈厚度演化具有中生代-古近纪早期的缓慢增厚和古近纪至今的快速增厚的特征,即中生代早期＂热＂岩石圈厚度为57~62km,平均为59km,逐渐增加至中生代末期的76~84km,平均为79km;古近纪受印度板块与欧亚板块碰撞及其随后持续的汇聚作用,岩石圈厚度快速增厚,增加至现今的104~159km,平均为134km.本文的研究成果初步揭示出塔里木盆地中、新生代岩石圈演化的过程及阶段,弥补了塔里木盆地在这一方面的研究空白,具有重要的科学意义.In this paper,the＂thermal＂lithospheric thickness of the main geologic periods was calculated on basis of the thermal history of shallow sedimentary basin with combined of the theory of the Geothermics in the Tarim basin.The results show that the Mesozoic and Cenozoic lithospheric thickness evolution was characterized by slowly thickening from the Mesozoic to the early period of the Paleogene and rapid thickening since the mid-late period of the Paleogene,i.e.＂thermal＂lithospheric thickness was 57~62 km,with an average value of 59 km in the early period of the Mesozoic,gradually increasing to 76~84km,with an average value of 79 km in the end period of the Mesozoic.Due to collision between the India plate and Eurasia plate and subsequent continued convergence effect,the lithosperic thickness rapid thickened,and increased to 104~159km,with an average value of 134 km.The work may preliminarily reveal the process and stages of the Mesozoic and Cenozoic lithospheric thickness evolution,and this has filled the gap in this aspect of the Tarim basin,therefore,this work has an important scientific significance.

关 键 词：塔里木盆地 中、新生代 热历史 “热”岩石圈厚度 地热学 

分 类 号：P541[天文地球—构造地质学] P314[天文地球—地质学]