| 黑龙江漠河元宝山金矿地质及地球化学特征与找矿方向 |
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| 引用本文： | 李想,徐倩,徐开喜,吴国学.黑龙江漠河元宝山金矿地质及地球化学特征与找矿方向[J].世界地质,2016,35(1):123-132. |
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| 作者姓名： | 李想 徐倩 徐开喜 吴国学 |
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| 作者单位： | 1. 吉林大学 地球科学学院，长春 130061; 2. 黑龙江省齐齐哈尔矿产勘查开发总院，黑龙江 齐齐哈尔 161006 |
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| 摘 要： | 采用地质、物探、化探找矿方法,对漠河元宝山金矿进行综合研究。结果表明,目前已发现矿体4条,矿化体3条,Au平均品位2.15×10~(-6);赋矿地层为侏罗系中统漠河组;控矿构造为NEE向漠河推覆构造。磁场强度ΔT值一般在-30~20 nT,ΔΤ最大值为133.1 n T;视极化率最大值为23.58%,平均值为10.58%;视电阻率一般在500Ω·m以下,最高为1 200Ω·m,显示物探异常具低阻、高极化特征。漠河组地层金元素丰度值为8.06×10~(-9),标准离差为0.25,变化系数为0.912。黄铁矿δ~(34)S值为3.3×10~(-3)~5.3×10~(-3),极差为2.5×10~(-3),平均值为4.5×10~(-3),具有岩浆硫特点;石英中流体包裹体的δ18O值为5.2×10~(-3)~9.6×10~(-3),δD值为-125×10~(-3)~-112×10~(-3),δ18O和δD变化范围较大,反映在成矿过程中有大气降水加入。根据地质和物化探异常特征等综合信息,认为矿区西部小金沟(HS-8水系组合异常)有良好的找矿前景。
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| 关 键 词： | 金矿床 地质特征 找矿方向 漠河 黑龙江 |
Geological and geochemical features of gold ore and exploration direction of Yuanbaoshan Gold Ore in Mohe，Heilongjiang Province |
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| LI Xiang,XU Jing,XU Kai-Xi,WU Guo-Xue.Geological and geochemical features of gold ore and exploration direction of Yuanbaoshan Gold Ore in Mohe，Heilongjiang Province[J].World Geology,2016,35(1):123-132. |
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| Authors: | LI Xiang XU Jing XU Kai-Xi WU Guo-Xue |
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| Institution: | 1. College of Earth Sciences，Jilin University，Changchun 130061，China; 2. Qiqihar Institute of Mineral Ｒesources Exploration and Development，Qiqihar 161006，Heilongjiang，China |
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| Abstract: | Comprehensive research was carried on the gold ore in Yuanbaoshan by geological，geophysical and geochemical exploration methods． The results show that four ore bodies and three mineralized bodies have been found with an average Au grade of 2. 15 × 10 －6 ． The ore- hosting strata are the Middle Jurassic Mohe Formation． The ore- controlling structure is nappe structure of Mohe with NEE direction． The magnetic field strength ΔT usually is －30 ～20 nT，while with 133. 1 nT in maximum． The apparent polarization is 23. 58% in maximum and its av- erage is 10. 58%． The apparent resistivity is usually below 500 Ω·m，and the highest is 1 200 Ω·m，which shows the abnormal geophysical exploration feature by low resistance and high polarization． The gold abundance in Mohe Formation is 8. 06 ×10 －9 ，the standard deviation is 0. 25，and the coefficient of variation is 0. 912． The val- ue of pyrite δ 34 S is 3. 3 ×10 －3 ～5.3 ×10 －3 ，the range is 2. 5 ×10 －3 ，and the average is 4. 5 ×10 －3 ，which indi- cates the characteristics of magmatic sulfur． The value of δ 18 O of fluid inclusion in quartz is 5. 2 × 10 －3 ～ 9. 6 × 10 －3 ，the value of δD is －125 ×10 －3 ～ －112 ×10 －3 ，and the variation range of δ 18 O and δD is comparatively big，which shows atmospheric precipitation was in the process of mineralization． According to the abnormal features of geological and geophysical exploration，we believe that there is good prospect for explovation in Xiaojingou in western ore district (HS- - 8 combination anomaly of stream) . |
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| Keywords: | gold deposit geologic feature prospecting direction Mohe Heilongjiang Province |
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