准噶尔盆地北部燕山中期古地温梯度恢复  

Paleogeothermal Gradient Recovery in Middle of Yanshanian in Northern Junggar Basin

作　　者：李振华[1] 陈刚[2,3] 丁超[2,3] 陈占军[2,3] 崔建斌[1] 周华龙[1] 许泰[1] 

机构地区：[1]陇东学院能源工程学院,甘肃庆阳745000 [2]西北大学大陆动力学国家重点实验室,西安710069 [3]西北大学地质学系,西安710069

出　　处：《地质科技情报》2014年第4期31-36,共6页Geological Science and Technology Information

基　　金：教育部高校博士点专项科研基金(20116101110006)

摘　　要：运用磷灰石裂变径迹（AFT）法和镜质体反射率（Ro）法恢复了准噶尔盆地北部燕山中期的古地温梯度。研究结果显示,磷灰石裂变径迹（AFT）恢复的古地温梯度分布在3.5~3.9℃/hm;镜质体反射率（Ro）恢复的古地温梯度接近4.0℃/hm;平均接近3.7℃/hm,明显高于2.3℃/hm的现今地温梯度。准噶尔盆地北部燕山中期较高古地温场背景不仅对烃源岩热演化研究具有重要意义,同时也指示了准噶尔盆地北部存在一次燕山中期构造热事件。In this paper,we apply the apatite fission track（AFT）and vitrinite reflectance（Ro）analysis to recover the paleogeothermal gradient in the middle of Yanshanian in northern Junggar Basin.The study shows that the paleogeothermal gradient recovered by AFT distributes in 3.5-3.9℃/hm;the paleogeothermal gradient recovered by Rois 4.0℃/hm;and the average is about 3.7℃/hm,which is significantly higher than the present geothermal gradient-2.3℃/hm.The background of higher paleogeothermal field in the middle of Yanshanian in northern Junggar Basin has an important influence on source rock researches,at the same time,it is a significant indication of a tectonic-thermal event in middle of Yanshanian.

关 键 词：准噶尔盆地北部 燕山中期 磷灰石裂变径迹 镜质体反射率 古地温梯度 

分 类 号：P511[天文地球—地质学]