摘要
该铅锌矿床位于扬子准地台滇东台褶带昆明台褶束南缘,区域构造以北东向及东西向断裂和褶皱构造为主,矿区构造线方向与区域构造线特征大体相近,呈近东西向或北东东向。矿区内主要为一单斜构造,地层倾向南南东。矿床产于上泥盆统在结山组(D3zj)的断层破碎带中,该地层倾向南南东,倾角20-30°,岩性单一,主要由浅灰、灰白色薄层状含泥质条带粉-细晶白云岩与中-厚层状、块状粉-细晶白云岩组成。矿体呈脉状产出,走向近北东东。矿石矿物主要为闪锌矿,其次为少量方铅矿,未见其他金属矿物,脉石矿物只有方解石。该矿床是受北东东向的断裂构造和泥盆系下统在结山组(D3zj)白云岩系控制的,含矿热液沿断裂构造运移,在碳酸质围岩性质活泼的构造破碎带中发生交代、蚀变、充填作用,于有利的成矿空间内沉淀富集并成矿,属中低温热液型矿床。
The Pb-Zn deposits of Jianshui county in Yunnan Province, located in the south margin of Kunming folded belt, east Yunnan folding zone in Yangtze Paraplafform. The regional structure mainly in NE and EW of fracture and folding, structural lines of ore district are nearly in EW or NEE direction likely the regional structure lines, which is a monoclinal structure, SSE dip. This deposits in fault rupture zone during construction in Zaijieshan Formation of Devonian System . the stratigraphic inclination trend SSE-S and dip angle is 20 - 30°, the ithology is single, it is mainly composed of low gray-and-white and the low layered structure of micro-crystal-aplite. Mainly by the light grey, with its thin layer of dirt is a fine powder, and the crystalline - thick and thin, white powdered bulk of crystalline rock. The trend of the veins ore body is east-west. The major ore minerals are sphal- erite, and a little galenite, with no other minerals, the gangue minerals is calcite. The ore deposit are controlled by NEE rift tectonic and the Zaijieshan Formation Dolostone of the Lower Devonian System. The ore-forming hydrothermal fluid via the fractured zones , it react with the active wall carbonate rocks in fractured zones by replacement, alteration and packing action. The useful mineral enriched and precipitated in favorable structures place. It formed this Pb-Zn Polymetallic Ore Deposit. and the results indicate that it is a hydrothermal （medium to low temperature type）.
出处
《贵州大学学报（自然科学版）》
2012年第1期58-61,共4页
Journal of Guizhou University:Natural Sciences
关键词
铅锌矿床
构造控制
成矿条件
云南建水
the Pb-Zn deposits
tectonic-controlling
ore-forming condition
The Jianshui of Yunnan
