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北部湾盆地今古地温场特征及热史演化 被引量:18

STUDY ON THE GEOTHERMAL CHARACTERISTICS AND THERMAL HISTORY OF BEIBUWAN BASIN
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摘要 北部湾盆地的现令地温场具有不均一性,这种特征除与基岩埋藏深度有一定关系外,在很大程度上与活动热流体有关。地壳热结构分析表明本区的大地构造背景比较稳定,放射性产热元素所带来的影响不容忽略。利用镜质体反射率、流体包裹体以及粘土矿物等参数,对盆地的古地温场做了探讨。最后,运用Mckenzie模型模拟了盆地的热演化史。 Beibuwan Basin is located on the northern continental shelf of southChina Sea. It is a Cenozoic sedimentary basin. Calculation of geothermal gradient andheat flow values indicates that the geothermal field of Beibuwan Basin is inhomogeneous.Geothermal anomalies are mainly caused by hydrothermal fluid activities. By means ofLopatin et al's methods,the relationship between paleotemperature and organicmaturation is discussed.X-ray diffractiOn of clav minerals and analysis of fluidinclusions reveals some features of the paleogeothermal field.Finally,Mckenzie’sstretching model has been used to investigate the thermal history of this basin, Heat flowpattern illustrates that heat flow value at about 6 Ma from now increases abruptly.
机构地区 中国地质大学
出处 《长春地质学院学报》 CSCD 1995年第2期173-177,共5页
基金 家自然科学基金
关键词 地温梯度 热流 热史 北部湾盆地 古地温场 geothermal gradient,heat flow,thermal history,Beibuwan Basin
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