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| 黔西北福来厂铅锌矿床Pb同位素研究及地质意义 | |
| 引用本文： | 汤世凯,马筱,李学刚,戴传固,张慧,周琦,况顺达,杨坤光.黔西北福来厂铅锌矿床Pb同位素研究及地质意义[J].大地构造与成矿学,2012,36(4):549-558. |
| 作者姓名： | 汤世凯 马筱 李学刚 戴传固 张慧 周琦 况顺达 杨坤光 |
| 作者单位： | 1. 中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉,430074 2. 贵州省地质调查研究院,贵州贵阳,550005 3. 中国地质大学(武汉)构造与油气资源教育部重点实验室,湖北武汉430074;中国地质大学(武汉)地球科学学院,湖北武汉430074 |
| 基金项目： | 贵州省国土资源厅"贵州区域构造特征、构造演化与矿产空间分布关系研究"和国家自然科学基金项目 |
| 摘 要： | 单阶段演化正常铅用H-H法可获得高准确性的模式年龄,在黔西北福来厂铅锌矿床中采集16件矿脉和围岩样品,测定它们的Pb同位素组成,206 pb/204 Pb为18.5346 ～ 18.7294(均值18.5935),207pb/204 Pb为15.7408～15.7603(均值15.7519),208 pb/204 Pb... |
| 关 键 词： | Pb同位素 成矿年龄 物质来源 铅锌矿 黔西北 |
Pb Isotope Composition of the Fulaichang Lead-Zinc Ore Deposit in Northwest Guizhou and its Geological Implications |
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| TANG Shikai , MA Xiao , LI Xuegang , DAI Chuangu , ZHANG Hui , ZHOU Qi , KUANG Shunda , YANG Kunguang.Pb Isotope Composition of the Fulaichang Lead-Zinc Ore Deposit in Northwest Guizhou and its Geological Implications[J].Geotectonica et Metallogenia,2012,36(4):549-558. | |
| Authors: | TANG Shikai MA Xiao LI Xuegang DAI Chuangu ZHANG Hui ZHOU Qi KUANG Shunda YANG Kunguang |
| Abstract: | Precise model age of single-stage evolution ordinary lead can be calculated by Holmes-Houtormans method.Sixteen samples of ore veins and wall rocks from the Fulaichang lead-zinc ore deposit were analyzed for their Pb isotopic compositions.Both the ore veins and wall rocks present similar geochemical characteristics:206 Pb/204 Pb =18.5346～18.7294(average 18.5935),207 Pb/204 Pb= 15.7408-15.7603(average 15.7519),208 Pb/204 Pb =38.9718~ 39.1766(average 39.0731).Accordingly,the lead in the lead-zinc ore deposit belongs to ordinary lead.Using Pb-Pb dating method,we get Pb model age of the ore veins(240~229 Ma) and the wall rock(254~230 Ma).Pb model ages of the ore veins are consistent with the ages of the wall rocks.Thus,the Pb model ages of the veins represent the major Pb mineralization period and indicate that the lead-zinc ore deposit was formed during Indosinian.The regional NW normal faults are products of regional uplift in Indosinian.These faults controlled the distribution of lead-zinc ore deposits in this area.According to Pb isotope tectonic model diagram and Δβ-Δγ diagram,we conclude that the metallogenic materials were derived from the upper crust.The upper crustal capping rocks(wall rocks) provided the major source of ore metals.Additionally,the metamorphic basement may also provide part of Pb.The Emeishan basalts are unlikely the source of the metals. |
| Keywords: | Pb isotope mineralization age material source lead-zinc ore deposits Northwest Guizhou |
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