| 拉张盆地构造热演化模拟的影响因素 |
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| 引用本文： | 何丽娟,熊亮萍.拉张盆地构造热演化模拟的影响因素[J].地质科学,1998,33(2):222-228. |
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| 作者姓名： | 何丽娟 熊亮萍 |
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| 作者单位： | 中国科学院地质研究所 北京 100029 |
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| 摘 要： | 沉积盆地的热历史与其构造演化史密切相关。拉张盆地构造热演化模拟正是研究盆地在形成演化过程中的热历史及沉降史,它们主要受岩石圈拉张演化特征的控制。本文着重讨论在构造热演化模拟中应考虑的几个重要因素:拉张的多期性、多期拉张过程中岩石圈底界的移动、拉张模式的多样性以及拉张的横向非均匀性。
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| 关 键 词： | 构造热演化模拟 多期拉张 岩石圈底界 拉张模式 横向非均匀性 |
| 收稿时间： | 1997-09-04 |
| 修稿时间： | 1997-09-04; |
EFFECTS ON THE TECTONOTHERMAL MODELING OF EXTENSIONAL BASINS |
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| He Lijuan\ Xiong Liangping\ Wang Jiyang.EFFECTS ON THE TECTONOTHERMAL MODELING OF EXTENSIONAL BASINS[J].Chinese Journal of Geology,1998,33(2):222-228. |
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| Authors: | He Lijuan\ Xiong Liangping\ Wang Jiyang |
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| Institution: | Institute of Geology, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | The thermal history of sedimentary basin relates closely to its tectonic history. The tectonothermal modeling of extensional basins is to study the thermal and subsidence histories in the process of basin extension. The evolution history is mainly controlled by the characteristics of lithosphere extension. In this paper, some effects on the tectonothermal modeling are discussed. 1) Multi phases stretch: The inheritance of extension embodies not only the structure, but also the temperature field. The unsteady temperature field of earlier extension stage will have great effects on the evolution history of later stage. The thermal history and present thermal state of basin is controlled by comprehensive effects of multi phases stretch. 2) Lithosphere base: It influences the tectonothermal history of basin greatly. Its selection and variation is worth further study. 3) Stretch mode: Different stretch modes will give different evolution processes. The selection of stretch mode is very important to reconstruct properly the process of evolution. 4) Lateral nonuniformity: The lateral nonuniformity of extension could cause lateral difference of thermal gradient and lateral heat transfer within the basin. In this case, the tectonothermal history of adjacent blocks will influence each other. In one word, tectonothermal model should be developed in the direction of multi phases, non instantaneousnesness and nonuniformity . |
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| Keywords: | Tectonothermal modeling Multi phases stretch Lithosphere base Stretch mode Lateral nonuniformity |
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