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双侧轴向单极—偶极激电测深在勘查铅锌等多金属矿中的应用 被引量:11
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作者 雒志锋 彭兴刚 《物探与化探》 CAS CSCD 北大核心 2009年第5期501-506,共6页
双侧轴向单极—偶极排列具有采集数据量大、激电信号强、穿透深度大、勘探精度高和效率高等优点。在内蒙巴林左旗某工区使用GDP-32Ⅱ地球物理数字接收机,应用双侧单极—偶极时域激电测深法勘查银、铅锌等多金属矿,钻探验证二维反演地电... 双侧轴向单极—偶极排列具有采集数据量大、激电信号强、穿透深度大、勘探精度高和效率高等优点。在内蒙巴林左旗某工区使用GDP-32Ⅱ地球物理数字接收机,应用双侧单极—偶极时域激电测深法勘查银、铅锌等多金属矿,钻探验证二维反演地电断面异常见破碎带及多金属矿化,说明双侧轴向单极—偶极激电测深在勘探区取得了较好的地质效果。 展开更多
关键词 激发极化法 双侧轴向单极—偶极激电测深 铅、锌多金属矿 隐伏矿勘探
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吉林省磐石市小红石砬子铅锌块状硫化物矿床的特征及意义 被引量:4
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作者 曹建锋 孙志勇 薛晓刚 《长春工程学院学报(自然科学版)》 2012年第1期90-94,118,共6页
磐石市小红石砬子银铅锌多金属矿区处在磐石—永吉—双阳海西期花岗岩与石炭系碳酸岩建造的外接触带,产在中生代北西向线性火山断陷盆地内,位于海西晚期近圆形的火山穹隆构造南东部,属于块状硫化物型银铅锌多金属矿床;通过对该矿床地质... 磐石市小红石砬子银铅锌多金属矿区处在磐石—永吉—双阳海西期花岗岩与石炭系碳酸岩建造的外接触带,产在中生代北西向线性火山断陷盆地内,位于海西晚期近圆形的火山穹隆构造南东部,属于块状硫化物型银铅锌多金属矿床;通过对该矿床地质特征的描述,区域分布规律及其成矿机理的探讨,为吉中地区寻找类似矿床打开了思路。 展开更多
关键词 磐石市 铅、锌多金属矿 块状硫化物矿床
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Late Mesozoic magmatism and tectonic evolution in the Southern margin of the North China Craton 被引量:16
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作者 GAO XinYu ZHAO TaiPing 《Science China Earth Sciences》 SCIE EI CAS CSCD 2017年第11期1959-1975,共17页
Late Mesozoic granitic magmatism(158–112 Ma) are widespread in the southern margin of the North China Craton(NCC), contemporary with many world-class Mo-Au-Ag-Pb-Zn polymetallic deposits. There are abrupt changes in ... Late Mesozoic granitic magmatism(158–112 Ma) are widespread in the southern margin of the North China Craton(NCC), contemporary with many world-class Mo-Au-Ag-Pb-Zn polymetallic deposits. There are abrupt changes in the elements and isotopic compositions of these granites at about 127 Ma. The early stage(158–128 Ma) granites show slightly or no negative Eu anomalies, large ion lithophile elements enriched and heavy REE depleted(such as Y and Yb), belonging to typical I-type granite. The late stage(126–112 Ma) granites are characterized by A-type and/or highly fractionated I-type granite, with higher contents of SiO2, K2 O, Y, Yb and Rb/Sr ratio and lower contents of Sr, δEu value and Sr/Y ratio than that of the early-stage granites.Moreover, the whole rock Nd and Hf isotopic compositions of the granites younger than 127 Ma show more depleted than those of the older one. The two stages of Late Mesozoic granites were derived from a source region of the ancient basement of the southern margin of the NCC incorporated the mantle material. The late stage(126–112 Ma) granites contain more fractions of mantle material with depleted isotopic composition than the early ones. The granites record evidence for a strong crust-mantle interaction. They formed in an intracontinental extensional setting which was related to lithospheric thinning and asthenospheric upwelling in this region, which was possibly caused by westward subduction of the Paleo-Pacific plate. 127 Ma is an critical period of the transformation of the tectonic regime. 展开更多
关键词 Southern margin of the North China Craton Late Mesozoic GRANITE ORIGIN Tectonic evolution
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