| 毛德宝,沈保丰.山西省高凡银金矿床的成因[J].地质找矿论丛,1991,(3):13-24 |
| 山西省高凡银金矿床的成因 |
| GENESIS OF GAOFAN SILVER-GOLD DEPOSIT IN SHANXI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1991.3. 002 |
| 中文关键词: 银金矿床 浊积岩 火山—次火山复式岩体 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 产于五台花岗岩—绿岩带上部高碳质浊积岩系中的高凡银金矿床,与燕山期火山—次火山复式岩体有空间联系。本文通过多方面的研究,探讨了矿床的物质来源及其与多种地质因素的成因联系。 |
| 英文摘要: |
| Gaofan silver-gold deposit is hosted by carbonaceous turbidite sequences, occuring in the upper of Wutai Archean granitoid-greenstone belt. In the orefield, there are Yanshanian volcanic-subvolcanic intermediate-acidic magmatic rocks whose genesis is closely realted to the granitoid-greenstone belt. The gold contents in turbidite and the volcanic-subvolcanic complex are not uniform, very high in carbonaceous phyillite and the alteration zone of the complex, although their mean basicaly coincide with that of the same kind rock in the world. Carbon in ore and CH4 in gas component of fluid inclu-sions in quartz tested very high. Some organic inclusions were found. The range of δ34S Values(-5.4～+3.5‰) are relatively narrow. The δD values(-86.5～-64.4‰) and δ18O values(+2.63～+12.65‰) indicate that ore-foming fluid mainly originated from the magmatic water. The δ18O and δ13Cvalues of carbornate in ore are similar to those in the strata, which consistent whith oceangenetic car-bornate. The composition of Pb-isotope, whose model-ages range from 926--1089Ma, have the feature of ancient anomalous lead. All of the above characters suggest that the carbonaceous turbidite and the volcanic-subvolcanic complex jointiy play important roles in the process of mineralition. So this deposit is a regenerated turbidite-hosted deposit in the Archean greenstone belt. |
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