| 塔里木盆地北部的地温特征 |
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| 引用本文： | 谢德宜.塔里木盆地北部的地温特征[J].地球科学,1993,18(5):627-634. |
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| 作者姓名： | 谢德宜 |
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| 作者单位： | 地矿部石油地质研究所 |
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| 摘 要： |
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| 关 键 词： | 塔里木盆地 地温梯度 古地温 |
GEOTHERMAL CHARACTERISTICS IN NORTHERN TARIM BASIN,NORTHWESTERN CHINA |
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| Xie Deyi.GEOTHERMAL CHARACTERISTICS IN NORTHERN TARIM BASIN,NORTHWESTERN CHINA[J].Earth Science-Journal of China University of Geosciences,1993,18(5):627-634. |
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| Authors: | Xie Deyi |
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| Abstract: | Based on a large amount of collected data,such as geotemperature ,vitrinite reflectance and fluid inclusion,this study is focused on geothermal characteristics in Northern Tarim Basin. (l)The present thermal gradients are very different in various tectonic units. Generally, depressions are lower gradient, while uplifts and huge gas fields accumulating on Cenozoic are higher. High gradient anomalies on the gas fields may be generated by an upward migration and accumulation of the heat flow from the deep. The results demonstrate that the present gradient in northern Tarim Basin is low ,and increases obviously from the lower to the upper levels in the vertical section,due to different thermal conductivities of the rocks and depositional rates of the sediments. (2)Estimates are made for the palaeo-geothermal gradient of the major source rocks in several significant periods by using the crust thickness method. (3)The specific relationship between the Mesozoic low vitrinite reflectance and high geotemperature is attributed to the very fast deposition of the overlying Cenozoic, which causes the great burial depth and shortens effective heating time of the Mesozoic. |
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| Keywords: | Tarim Basin (palaeo-)geothermal gradient crust thickness method vitri- nite reflectance effective heating time |
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