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南海北部陆坡气源条件对水合物成藏影响的模拟研究

DOI: 10.6038/cjg20130119, PP. 188-194

Keywords: 水合物,气源,模拟,北部陆坡,南海

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Abstract:

南海北部陆坡包括神狐海域在内无论在横向上还是纵向上影响水合物形成与分布的地质因素差异较大,其气源条件的变化是否为一种重要因素值得探索.本文将前人南海北部陆坡气源类型和气体组成概括为14种情况,分别运用模拟手段定量-半定量地分析它们对水合物成藏可能带来的影响.模拟结果显示,与神狐海域已知水合物相比,不同气体组成形成水合物所需温度条件增大0.49~5.44℃,多数增大2℃以上.可以看出,不同气体组成明显改变水合物的形成条件,暗示着不同类型气源可能是影响南海北部陆坡水合物形成与分布的重要因素.

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