| 云南大型超大型金属矿床壳幔定位规律 |
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| 引用本文： | 杨平,马亚雄,白磊,曹显光.云南大型超大型金属矿床壳幔定位规律[J].世界地质,2015,34(1):135-141. |
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| 作者姓名： | 杨平 马亚雄 白磊 曹显光 |
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| 作者单位： | 云南省有色地质局，昆明 650051 |
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| 摘 要： | 利用云南1∶50万布格重力异常图,以24×24 km2内49网格点求取布格重力异常均值△g,用公式HM=34.8-0.062 8△g,反演获得莫霍面深度,绘制1∶200万云南莫霍面等深线图,把云南1 800多个金属矿床(点)投绘在图上,总结出云南大型、超大型金属矿床的壳幔定位7条规律。并发现云南壳幔界面主体呈近南北向的复式地幔坳陷,其中发育有8条次级地幔坳陷带、10个地幔波台区。次级幔坳带及波台区控制了云南大型、超大型金属矿床的生成、展布。
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| 关 键 词： | 地幔坳陷带 波台区 矿床定位规律 云南省 |
Crust- mantle positioning rules for Yunnan large and super- large metallic mineral deposits |
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| YANG Ping,MA Ya-Xiong,BAI Lei,CAO Xian-Guang.Crust- mantle positioning rules for Yunnan large and super- large metallic mineral deposits[J].World Geology,2015,34(1):135-141. |
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| Authors: | YANG Ping MA Ya-Xiong BAI Lei CAO Xian-Guang |
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| Institution: | Yunnan Nonferrous Metals Geological Bureau，Kunming 650051，China |
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| Abstract: | The bouguer gravity anomaly mean value △g is calculated with 49 grid points in an area of 24 ×24 km 2 in the Yunnan 1∶ 500，000 bouguer gravity anomaly map． By using the formula HM =34. 8 －0. 062 8△g and inversion，the Mohorovicic discontinuity depth is obtained to draw up the 1∶ 2，000，000 Yunnan Mohorovicic discontinuity bathymetric chart． More than 1 800 metallic mineral deposits (points) in Yunnan are projected and drawn on the map，and seven laws in positioning the crust mantle of large and super- large metallic mineral deposits in Yunnan are summarized． The authors find out that the main body of Yunnan crust- mantle boundary presents a trend of compound mantle depression in a nearly south- north direction，in which are developed eight subprime man- tle depression belts and ten mantle wave areas． The subprime mantle depression belts control the generation，expansion and distribution of large and super- large metallic mineral deposits in Yunnan． |
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| Keywords: | mantle depression bench area mineral deposit positioning rules Yunnan Province |
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