| 李英,高福模.陕南镇旬矿田铅锌矿化特征及成因[J].地质找矿论丛,1989,(2):54-66 |
| 陕南镇旬矿田铅锌矿化特征及成因 |
| CHARACTERISTICS OF Pb-Zn ORE DEPOSITS IN ZHENXUN METALLOGENIC BELT IN SHANXI AND THEIR GENESIS |
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| DOI：10.6053/j.issn.1001-1412.1989.2. 005 |
| 中文关键词: 古断陷 热流对流系统 硅化 铅的均匀源 二元混合模型 喷流(气)成矿 |
| 英文关键词:palaeo graben Hydrothermal convective system silicification pb isotopic homogeity bimodel exhalation |
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| 中文摘要: |
| 镇旬矿田属秦岭泥盆系铅锌一菱铁矿带,矿化在空间上分布于乾佑河南北向古断陷的两侧,产生于泥盆纪.铅锌矿化特征与凤太矿田的诸矿床及西成矿田的毕家山、邓家山等矿床相似.铅同位素组成是均匀的,模式年令略老于含矿地层年令,硫化物的硫同位素组成为海水硫酸盐型.矿体有沉积似层状和交代不规则状两种形态,主要围岩蚀变为硅化和铁白云石化.矿化与生物灰岩有密切空间和成因联系.因而说镇旬矿田与矿带中其余三个矿田的铅锌矿有相同的成因,成矿模式类似于E.D.Large(1981)和M.J.Russell(1983)提出的喷流成矿模式. |
| 英文摘要: |
| Zhenxun metallogenic belt is a part of Qinling Pb-Zn-Fe CO3 belt with mineralization occuring in the Devonian strata on the both side of Qiangu River Palaeo Fault Grabon (Trending in N-S direction). Pb, Zn mineralization is similar to the deposits of Fengtai ore field, Bijiashan deposit and Dengjiashan deposit in Xicheng ore field. Pb-isotopic composition is homogeneous. The model age is older than that of the ore-bearing strata. S-isotopic composition is chracterized by that of sulfate in sea water. Ore bodies show different forms i. e. layered bodies of sedimentation and irregular bodies of replacement. Wall rock alterations are dominated by silicification and ankeritization. Mineralization is closely related to bioclastic and reef limestone with genesis similar to exhalation type deposit suggested by E. D. large (1981) and M. J. Rusell (1983). |
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