新疆哈密大水锰矿地质特征及成因分析

GEOLPGICAL FEATURES OF THE DASHUI MN DEPOSITS IN THE HAMI,XINJIANG AND ITS ORE GENESIS

大水-红柳河锰矿带是东天山最重要成矿带之一,以大水锰矿为例,对该带锰矿成因模式进行研究.大水锰矿主要赋存于下震旦统与下寒武统不整合接触面上,地表矿体呈脉状,空间形态呈层状、似层状产出,与围岩产状基本一致.赋矿岩性为硅质岩和白云质灰岩,沉积环境为稳定浅海-滨海相,成矿物质在一种弱还原环境下发生沉积,后期经热液叠加,新生代受次生氧化改造,形成一定规模具工业价值的锰矿床,成因类型为受次生氧化改造的海相沉积型锰矿床.

The DASHUI-HONGLIUHE manganese ore belt is Dongtianshan area important mineralization belts, therefore in this area determination main manganese ore deposit origin pattern, Its epochal to based on this seeks for the formation, homeric manganese ore. Take the DASHUI manganese ore as the example, takes to bring with the manganese ore origin pattern to this mineralization to conduct the research. The DASHUI manganese ore main saves in the not-conformity face between sinian and early cambrian.the ore body surface assumes the arteries shape, the spatial shape assumes layered, resembles layered delivers, with adjacent formation occurrence basic consistent, assumes the synchronized distortion. The tax saves of the ore-bearing rocks is silicon-rocks and dolomite calcareous, the environment of deposition is the stable Neritic facies and Littoral facies, the mineralization material under one kind restores the environment weakly has the deposition, later period undergoes the hydrothermal superimposition, the Cainozoic Era suffers the secondary oxidation transformation, forms the certain scale and certain commercial value manganese ore deposit. The ore deposit genetic is the mainre deposit manganese ore deposit which suffer the secondary oxidation transformation