| 王清廉.陕西山阳桐木沟锌矿床地质特征及矿床成因[J].地质找矿论丛,1987,(2):54-64 |
| 陕西山阳桐木沟锌矿床地质特征及矿床成因 |
| THE GEOLOGICAL FEATURES AND GENESIS OF TONGMUGOU ZINC DEPOSIT IN SHANYANG COUNTY, SHENXI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1987.2. 006 |
| 中文关键词: 桐木沟 层控矿床 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 陕西桐木沟锌矿床为-大型以锌为主的多金属矿床.本文主要根据地层、构造及同位素组成等特征的研究,认为其成矿物质主要来源于本区的寒武-奥陶系地层,山阳-凤县深大断裂对矿液的运移起了重要作用,因此,应属于层控锌矿床. |
| 英文摘要: |
| This large zinc deposit occurs in the middle Devonian Qingshiya group located in north of Shanyang-Fengxian rift, which is composed of sericite phyllite, slate, hornstone, schistose marble predominantly. There are nine orebodies distributed as a zone, which are strictly fault-controlled. Among them, No.1 orebody is the largest, 1238 m long, 3m thick, extending 200m. The average grade is 14.87%Zn. with the content of sphalerite amounting to 60% in the ores. The age of the orebodies is believed to be 400 m.y. old, generally 430-500 m.y. old, according to lead isotope. Sulphur is derived from sial (crust source) of upper crust on the basis of the analysis of S isotope. It is speculated that the Precambrian-Ordovician strata is the oresouroe strata providing metals and sulphur. Shanyang-Fengxian rift is considered as the general channel for fluid solution, and the subfaults provided the space for the emplacement of mineralization. Post-tectonism and metamorphism are the factors for further reconstruction and enrichment of the mineralization Consequently, the auther believes that this zinc deposit is a strata-bound deposit of different sources. |
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