| 应用卫星重力信息对横断山系地区布格重力异常特异分布的纠正 |
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| 引用本文： | 王谦身,滕吉文,王光杰,张雪梅,张洪双.应用卫星重力信息对横断山系地区布格重力异常特异分布的纠正[J].地球物理学进展,2007,22(2):345-352. |
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| 作者姓名： | 王谦身 滕吉文 王光杰 张雪梅 张洪双 |
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| 作者单位： | 1.中国科学院地质与地球物理研究所，北京 100029;2.吉林大学，长春 130026 |
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| 摘 要： | 在云南省西部，跨越中、缅两国交界的横断山系地区（97°E~102°E，24°N~30°N）有近一半的面积尚没有重力测点、即重力数据空白区和重力测点稀少的普查级测区.以前的有关文献、图集中所给出对此地区的重力场都是十分模糊的结果与图件.因此应用这些资料无法详细地研究该地区重力场特征与深部地壳结构（构造）.本文应用卫星重力异常资料作为“近似空间重力异常”，经中间层改正后给出的“计算布格重力异常”，其分布特征与该地区的地形高程呈很好的镜像相关.对相应山脉、河谷以及断裂构造都有所反映.特别是在横断山系地区该布格重力异常呈现为近南北的走向.为此，据该“计算布格重力异常”,并选定对该区有代表性的一条重力异常剖面作正反演计算，以得到其地壳深部结构剖面.结果表明，在横断山脉地区的地壳厚度在51~56 km间起伏变化；滇西北云岭山系以及玉龙山区的地壳厚度约在60 km以上. 最后，对所得结果与图件进行了讨论，并提出了几点认识和纠正的建议.
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| 关 键 词： | 云南省西部 横断山系 重力场 计算布格重力异常 深部地壳结构 |
| 文章编号： | 1004-2903（2007）02-0345-08 |
| 收稿时间： | 2007-01-10 |
| 修稿时间： | 2007年1月10日 |
The correction for special pattern of Bouguer gravity anomaly in Heng Duan Mts area by using satellite gravity |
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| WANG Qian-shen,TENG Ji-wen,WANG Guang-jie,ZHANG Xue-mei,ZHANG Hong-shuang.The correction for special pattern of Bouguer gravity anomaly in Heng Duan Mts area by using satellite gravity[J].Progress in Geophysics,2007,22(2):345-352. |
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| Authors: | WANG Qian-shen TENG Ji-wen WANG Guang-jie ZHANG Xue-mei ZHANG Hong-shuang |
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| Abstract: | In the western part of Yunnan Province, near half of the Heng Duan Mts area (97°E~101°E, 25°N~30°N) that straddles boundaries between China and Burma has no or sparse ground gravity measuring point yet. The maps and expounds for gravity anomaly field in this area are vague in relative literatures. Here it is hard to research directly the gravity field characteristic and the deep crustal structure. In this paper, the satellite gravity anomaly data are employed as pseudo free air gravity anomaly to calculate Bouguer gravity anomaly. The calculated Bouguer gravity anomaly exhibits well mirror correlation with the topography altitude of this district. Especially in the Heng Duan Mts area, the Bouguer gravity anomaly field appears near South-Northern trend obviously. A profile of deep crustal structure according to above calculation is obtained. In Heng Duan Mts area the crust thickness undulating in the scale is 51 to 56 km. The crust thickness in Yun Ling Mts and Yu Long Mts areas are more than 60 km. At last, the research results and suggest for correction are discussed. |
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| Keywords: | heng duan mts area gravity field calculated bouguer gravity anomaly deep crustal structure |
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