| 黑河市三道湾子金矿床地质、地球化学和成因探讨 |
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| 引用本文： | 刘宝山,吕军.黑河市三道湾子金矿床地质、地球化学和成因探讨[J].大地构造与成矿学,2006,30(4):481-485. |
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| 作者姓名： | 刘宝山 吕军 |
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| 作者单位： | 1. 中国地质大学,地质过程与矿产资源国家重点实验室,北京,100083;中国地质大学,岩石圈构造、深部过程及探测技术教育部重点实验室,北京,100083;黑龙江省地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005
2. 黑龙江省地质调查研究总院,齐齐哈尔分院,黑龙江,齐齐哈尔,161005 |
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| 基金项目： | 黑龙江省矿产资源补偿项目(编号:SD2002-29). |
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| 摘 要： | 黑河市三道湾子岩金矿体赋存于晚侏罗世塔木兰沟组安山岩中,是石英脉型矿体。通过对其围岩及金矿体稀土元素和稳定同位素的研究,发现围岩安山岩与石英脉金矿体稀土配分曲线缓右倾,形态基本一致,∑REE逐渐降低;δ34S均一化程度较高,分布范围集中,接近陨石硫,具明显的幔源硫同位素组成特点;铅同位素组成以高放射性成因铅为特点,围岩与石英脉金矿体比值十分接近,在铅同位素构造模式图上样品投影点均落于地幔与造山带间;上述特征显示成矿流体和物质主要来自岩浆热液或矿区火山岩,矿床形成于伸展构造环境,深源岩浆作用为成矿过程中成矿物质运移和流体循环提供了热能。
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| 关 键 词： | 三道湾子 含金石英脉 稀土元素 同位素 成矿流体 成矿物质 |
| 文章编号： | 1001-1552(2006)04-0481-05 |
| 收稿时间： | 2005-12-21 |
| 修稿时间： | 2006-03-31 |
GEOLOGICAL, GEOCHEMICAL AND GENETIC STUDY OF THE SANDAOWANZI QUARTZ VEIN-TYPE GOLD DEPOSIT IN HEIHE CITY, HEILONGJIANG PROVINCE |
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| LIU Baoshan,LU Jun.GEOLOGICAL, GEOCHEMICAL AND GENETIC STUDY OF THE SANDAOWANZI QUARTZ VEIN-TYPE GOLD DEPOSIT IN HEIHE CITY, HEILONGJIANG PROVINCE[J].Geotectonica et Metallogenia,2006,30(4):481-485. |
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| Authors: | LIU Baoshan LU Jun |
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| Institution: | 1. Sate Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China; 2. MOE Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology, China University of Geosciences, Beijing 100083, China ; 3. Qiqihaer Branch of Geological Survey of Heilongliang Province, Qiqihaer, HL 161005, China |
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| Abstract: | As a typical quartz vein-type gold deposit, Sandaowanzi gold deposit occurs in the andesite of the late Jurassic Tamulan Formation. Results from REE and stable isotopes studies show that the REE distribution patterns for the andesite are similar to those for gold ore bodies, since they are inclined toward right in both cases, and the ∑REE content is reduced gradually. The homogenization degree of δ 34 S values is high, and the distribution is centralized and similar to that for meteoritic sulfur, indicating that the sulfur could be mantle-derived. Lead isotope composition data suggest a very high rate of radiogenic lead and indicate that the ratio of lead isotope in country rocks is similar to those in gold ore bodies. When projected to the lead dynamic evolution curves of the structure model, the samples fall in the area located between the mantle and the orogen. All these characteristics indicate that the source of ore-forming fluid and metallogenic materials are magma-derived hydrothermal fluids or the large-scale eruptive volcanics in the area, and that the deposit was formed in an extensional tectonic setting. Volcanic magma from the deep mantle provided sufficient heat energy for migration and circulation of metallogenic fluids in the ore-forming process. |
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| Keywords: | Sandaowanzi gold-bearing quartz vein REE stable isotopes ore-forming fluid metallogenic material |
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