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中文摘要：
鄂尔多斯盆地在中生代晚期存在一期构造热事件，本文在对大量的镜质体反射率、火成岩年龄、磷灰石裂变径迹等资料分析的基础上，对构造热事件发生的时间、存在的地区及形成机理进行了深入的研究。鄂尔多斯盆地中生代晚期地热异常区主要分布在盆地南部的吴旗-庆阳-富县一带，构造热事件主要发生在中生代晚期早白垩世约140～100Ma，构造热事件持续时间约在10～40Ma之间。鄂尔多斯盆地中生代晚期构造热事件发生的根本原因在于中生代晚期岩石圈深部的热活动增强，盆地南部岩石圈深部热活动性更强，早白垩世鄂尔多斯盆地处于一种弱拉张的构造环境，地幔发生底侵作用，岩石圈减薄，发生岩浆侵入和喷发。异常地温场形成可能与秦岭造山带燕山晚期强烈的构造活动导致鄂尔多斯盆地岩石圈深部活动有密切的关系。
英文摘要：
The Ordos basin on late Mesozoic exist on a tectonic heat event. Based on analysis of the measured data about a great deal of vitrinite reflectance, age of igneous rock、age of apatite fission track, this paper study the time of the occurrence、existent region and the formation machanism of the tectonic heat event. It is determined that distributin of geothermal anomalous region on late Mesozoic era in ordos basin is Wuqi-Qingyang-Fuxian at the sourth of basin. It is decided that tectonic heat event occurred on 100～140 Ma of early Cretaceous period in late Mesozoic, continuous time of tectonic heat event is about 10～40 Ma. Occurrence of tectonic heat event on late Mesozoic in Ordos basin result from intensive thermal mobility of deep lithosphere on the late Mesozoic, Thermal mobility of deep lithosphere in sourth region is stronger than in north region. Mantle occur underplating and thickness of lithosphere reduce, magma invasion and eruption occur on late Mesozoic. Ordos basin be in weak extension environment on late Mesozoic. Formation of anomalous geothermal field has something to do with intensive thermal mobility of deep lithosphere in Ordos basin which resuts from intensive tectonical activity of Qinling orogenic belt on late Yangshanian period.
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