新疆三塘湖盆地构造-热史研究  

The tectonic-thermal evolution of the Santanghu Basin

作　　者：郝建荣[1] 柳益群[1] 冯乔[1] 邢秀娟[1] 张小芹 

机构地区：[1]西北大学地质学系/西北大学教育部大陆动力学重点实验室,陕西西安710069 [2]中国石油有限公司吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《西北大学学报（自然科学版）》2006年第2期290-294,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家重点基础研究发展规划基金资助项目(2001CB409801)吐哈油田分公司资助项目

摘　　要：目的以新疆三塘湖盆地为例,探讨复杂叠合盆地的盆地构造．热演化历程。方法多种热指标相互印证,采用Easy舶％模型进行热史反演。结果三塘湖盆地自晚古生代以来经历了海西、燕山、喜马拉雅期等多期不同构造运动的改造;盆地热演化相应划分为二叠纪的急速升温阶段, 三叠纪-早白垩世的缓慢降温阶段,第三纪至现今的基本稳定阶段;早-中二叠世地温梯度高达 4．4-5．2℃／hm,三叠纪一侏罗纪地温梯度3．12-3．93℃／hm,白垩纪以后地温梯度与现今地温梯度相差不大,2．2-2．8℃／hm。结论构造运动的发生期是盆地热体制发生转变的重要时期,此时盆地地温场发生变化,并影响到盆地有机质的演化。Aim To study Sangtanghu Basin as a superimpose basin which deposited terrestrial sediment of Mesozoic-Cenozoic and has a complicated structural evolutionary history. Methods Based on thermal indicator, Easy Ro% model can be adopted to carry out the inversion of thermal history. Results The basin was undergone multiperiod of tectonic movement such as hercynian, Indo-China, Yanshanian, Himalayan. The thermal evolution of the basin is distributed three stages correspondingly, including sharp heating-up process of Permian, gradual cooling process of Triassic to Early-Cretaceous and elementary stable stage of Tertiary to present. The Early-Middle Permian gradient reached 4.4 -5.2 ℃/hm, induced by local magmatic activities;Triassic-Jurassic gradient is normal （3.12 -3.93℃/hm）. The thermal gradient distributed nearly the the same with the present day＇s since Cretaceous, which is range of 2.2 - 2.8℃/hm. Conclusion The happening of these movements is the transforming time of thermal regime, and has the great effects on ground temperature field and organic evolution of the basin.

关 键 词：构造运动 盆地热史 镜质体反射率 三塘湖盆地 

分 类 号：P618.13[天文地球—矿床学]