| 王立社.北秦岭清岩沟镍-钼矿床成矿特征及成因[J].地质与勘探,2010,46(5):863-871 |
| 北秦岭清岩沟镍-钼矿床成矿特征及成因 |
| Metallogenic Characteristics and Genesis of the Qingyangou Ni-Mo Depositin the Northern Qingling Mountains |
| 投稿时间：2010-06-13 修订日期：2010-08-09 |
| DOI： |
| 中文关键词: 秦岭 镍-钼矿床 成因 黑色岩系 |
| 英文关键词: Qingling,Ni-Mo deposit,genesis,black rock series |
| 基金项目:西北有色地勘局地勘院科研项目“陕西南部黑色岩系金属矿床成矿规律及找矿预测研究冶(编号:地勘[2006]),新疆维吾尔
族自治区地质勘查基金项目“新疆若羌县长沙沟岩体中段铁多金属矿普查冶(编号:[2010]286)资助。 |
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| 中文摘要: |
| [摘要]经野外调研和室内研究发现,位于商州市大荆镇北的清岩沟镍-钼矿床赋存于庙湾组下
部黑色岩系中,岩系由绢云斜长石英千枚岩、黑云斑点状二云母千枚岩、石墨化绢云千枚岩、白云母细晶
大理岩-碳质白云岩、含石墨石英透辉透闪岩、含钛方解-石英片岩等组成,含Mo、Ni、Ti、Cu、Pb、Zn、P 及
碳质高。宏观及微观地质特征表明,岩石经历了区域变质变形、后期强烈韧-脆性剪切构造作用叠加、改
造。正是这种地质过程导致Mo、Ni 等成矿元素在沉积期形成之后,发生迁移、沉淀,形成硫化物型镍、钼
矿化,矿(化)体就位于岩系强烈揉皱与膨大的片理化带、赋存于强变形的刚性与塑性构造体接触带。研
究表明区内的岩脉与矿化关系不明显。最后认为,清岩沟镍-钼矿床为黑色岩系容矿的层控型沉积-变
质叠加-韧脆性构造改造的后生热液成因矿床。 |
| 英文摘要: |
| Abstract:Field investigations and researches suggest that the Qingyangou Ni-Mo deposit hosts in the black rock series at the lower section of the Mi鄄
aowan formation,which is made up of sericite, plagioclase quartz phyllite, maculose biotite two-mica phyllite, graphitlized sericite phyllite, muscovite
fine crystalline marble-carbonceous dolomite, graphite-quartz-diopside-tremolite rock and clalcite quartz schist. The contents of Mo, Ni、, Ti, Cu, Pb,
Zn, P and TOC are high in these rocks. Macroscopic and microscopic geological characteristics show the rocks have experienced regional metamorphism,
and the shear tectonic process of brittle-ductile superposition and transformation in the later period. Because of this process,Mo and Ni have been migra鄄
ted deposited after their formation. Finally,they are hosted in the schistosity zone or the contact between ductile bodies and rigid bodies,which has underg鄄
one intense tectonic deformation . Studies show that the relationship between veins and mineralization in the deposit area is not obvious. Thus we consider
that this deposit is a sedimentary-metamorphic-structural- hydrothermal-reformation type Ni-Mo deposit. |
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