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| 南海西沙海槽6 Ma以来天然气水合物稳定带演化初探 | |
| 引用本文： | 金春爽,汪集旸,卢振权.南海西沙海槽6 Ma以来天然气水合物稳定带演化初探[J].矿床地质,2011,30(1):156-162. |
| 作者姓名： | 金春爽 汪集旸 卢振权 |
| 作者单位： | 1. 国土资源部油气资源战略研究中心,北京,100034 2. 中国科学院地质与地球物理研究所,北京,100029 3. 中国地质科学院矿产资源研究所,北京,100037 |
| 摘 要： | 水深、海底温度、地温梯度是影响天然气水合物稳定带的重要因素。文章通过海平面变化、底栖有孔虫氧同位素、构造热演化资料分析了水深、海底温度、地温梯度的变化，进而探讨了南海西沙海槽地区6 Ma以来天然气水合物稳定带的演化。结果表明：南海西沙海槽地区6 Ma以来天然气水合物稳定带经历了稳定、缓慢减薄、快速增厚、小幅度变化和减薄的一个过程。海底温度的变化对天然气水合物稳定带厚度影响最大，热历史的影响次之，海平面变化的影响最小。 |
| 关 键 词： | 地质学 天然气水合物稳定带 演化 西沙海槽 南海 |
A tentative discussion on the evolution of the natural gas hydrates stable zone in Xisha Trough of South China Sea since 6 Ma B.P. |
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| JIN ChunShuang,WANG JiYang,LU ZhenQuan.A tentative discussion on the evolution of the natural gas hydrates stable zone in Xisha Trough of South China Sea since 6 Ma B.P.[J].Mineral Deposits,2011,30(1):156-162. | |
| Authors: | JIN ChunShuang WANG JiYang LU ZhenQuan |
| Institution: | JIN ChunShuang1,WANG JiYang2 and LU ZhenQuan3(1 Strategic Research Center for Oil and Gas Resources,Ministry of Land and Resources,Beijing 100034,China,2 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,3 Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China) |
| Abstract: | Based on the changes of sea level, oxygen isotope of benthic foraminifer and thermal evolution, this paper analyzed the changes of water depth, sea bottom temperature and geothermal gradient of Xisha Trough since 6Ma B.P., then predicted the evolution of the natural gas hydrates stable zone. The result shows that the natural gas hydrates stable zone has gone through stable stage, slowly attenuating stage, relatively quick incrassation stage, gently changing stage and quickly attenuating stage. The sea bottom temperature change has most strongly affected the natural gas stable zone, sea level variation has had the weakest influence and geothermal gradient has exerted the intermediate influence. |
| Keywords: | geology Natural gas hydrate stability zone evolution Xisha Trough the South China Sea |
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