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| 辽宁省海城市小孤山铅锌多金属矿集区成矿地质特征及成因分析 | |
| 引用本文： | 董存杰.辽宁省海城市小孤山铅锌多金属矿集区成矿地质特征及成因分析[J].地质与勘探,2010,46(4):599-608. |
| 作者姓名： | 董存杰 |
| 作者单位： | 1. 中国地质大学,北京,100083;辽宁有色地质局沈阳地质勘查院,沈阳,110121 2. 中国地质调查局,北京,100037 3. 辽宁有色地质局沈阳地质勘查院,沈阳,110121 4. 山东省第三地质矿产勘查院,烟台,264000 |
| 摘 要： | 勘查结果表明,小孤山矿集区的成矿作用受印支期花岗岩体、脉岩、断裂和地层的多重控制。康家岭铅锌矿区含矿围岩与正常大理岩碳同位δ13C存在明显差异,分别为+0.186和-6.055。说明矿集区的成矿作用在成岩作用之后,这种差异是成矿过程中热液蚀变造成的。铅同位素模式年龄均为负值,具明显异常铅特征,表明本区铅锌矿体的成矿物质具多源性。根据矿集区内唐望山印支期花岗岩体的化学成分及特征值判断,岩体为S型花岗岩。其Pb、Zn、Au、Ag的丰度均低于辽河群地层。岩体在早期侵入过程中,同化围岩并在岩体边部发生分异作用,使围岩中成矿元素在岩体边部及脉岩内富集,随着岩体及脉岩的进一步分异形成含矿热液,与脉岩在共同的断裂系统内运移,并在有利的岩性组合和断裂内充填成矿;岩体在侵入的晚期,随着温度和压力的下降,同化围岩及富集成矿元素的能力都相应减弱,并在与围岩接触部形成大规模的碎裂岩带,从而形成大规模的硅化带和地球化学异常。 |
| 关 键 词： | 地球化学异常 碎裂岩 S型花岗岩 小孤山 |
| 收稿时间： | 4/6/2010 12:00:00 AM |
| 修稿时间： | 2010/6/10 0:00:00 |
Metallogenic Geological Characteristics and Analysis of the Xiaogushan Polymetallic Mineralization Area in Haicheng City, Liaoning Province |
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| DONG Cun-jie.Metallogenic Geological Characteristics and Analysis of the Xiaogushan Polymetallic Mineralization Area in Haicheng City, Liaoning Province[J].Geology and Prospecting,2010,46(4):599-608. | |
| Authors: | DONG Cun-jie |
| Institution: | China University of Geosciences, Beijing |
| Abstract: | Exploration results show that the mineralization of the Xiaogushan deposit is controlled by granite mass and vein rocks,faults and strata.The carbon and oxygen isotopes exhibit a distinct difference between marble surrounding orebody and normal marble,which are +0.186 and-6.055,respectively.It implies that mineralization was after lithogenesis in this mineralized ditrict and caused by hydrothermal alteration in the mineralizaton process.The lead-isotope ages are all negative,indicative of conspicuous lead a... |
| Keywords: | geochemical anomaly cataclastic rock S-type granite Xiaogushan |
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