| 内蒙东升庙硫化物多金属矿矿区同生断层的一些证据及矿床成因 |
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| 引用本文：.1994.Some evidence for contemporaneous faults in the Dongshengmiao sulfide polymetallic ore district in Inner Mongolia and the genesis of the ore deposit[J].Mineral Deposits,13(1):49~60 |
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| 中文摘要:东升庙硫化物多金属矿矿床产于华北地台北缘狼山群细碎屑岩、碳酸盐岩中。矿区内发育大量沉积-重力构造，地层厚度及岩性变化甚大，表明矿区很可能存在同生断层。据同位素分析结果、包裹体测温及成分分析资料、成矿组分的空间分布特征以及围岩的地球化学特征等，认为矿床属弱变质喷气-沉积矿床。 |
| 中文关键词:硫化物多金属矿 沉积-重力构造 矿床成因 内蒙东升庙 |
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| Some evidence for contemporaneous faults in the Dongshengmiao sulfide polymetallic ore district in Inner Mongolia and the genesis of the ore deposit |
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| Abstract:The Dongshengmiao sulfide deposit located on the northern margin of the North China platform is a Middle Proterozoic deposit, and the mineralization spots lie in a third-grade fault basin within the Langshan-Bayan Obo rift system. Some evidence shows that there exist contemporaneous faults in the ore district which might have served as channelways for hydrothermal solutions in the process of mineralization and controlled the evolution of the basin. There is also evidence for the presence of volcanic activity that took place simultaneously with the ore-forming process, and this volcanic activity might have provided heat for the hydrotbermal activity.Some exhalites have been observed in the ore deposit, such as biotitite and Chloritite.Isotopic studies indicate(1) Pb came from the depth of the crust;(2) sulfide was derived from seawater and hydrothermal solution; and(3)C and O in dolomite of ore veins were mixtures of hydrothermal solution and sedimentary dolomite.B and Ba contents of wall rocks are extremely high, implying the existence of hydrothermal exhalative activities. From th e bottom of the orebody upward and from the center to both sides there is indistinct zoning of elements: Cu(FeS)→Pb(FeS) →Zn(FeS) →Fe(FeS2)→Fe(FeCO3). Studies on inclusions in minerals show that the seawater was less than 340m in depth and the temperature of the hydrothermal solution was 240℃±. The ore deposit is of exhalative-sedimentary type. |
| keywords:sulfide polymetallic deposit, sedimentary-gravity tectonics, genesis of ore deposit, Dongshenmiao in Inner Mongolia |
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