摘要
江西银山多金属矿床发育南北不对称的矿化与蚀变分带。矿区南部的分带性较完整，从九区Ｃｕ（Ａｕ）矿化带往南依次为银山区Ｃｕ－Ｐｂ－Ｚｎ矿化带、含银Ｐｂ－Ｚｎ矿化带和南山区Ｐｂ－Ａｇ矿化带，形成了相应的矿物共生组合及演化序列。矿化作用发生在成矿热液的缓慢演化过程中。九区Ｃｕ（Ａｕ）矿化带北侧的九区Ｚｎ－Ｐｂ矿化带，是在物理化学条件急剧变化的热液体系中，各种矿物在溶液浓度同时达到饱和或过饱和后快速沉淀的产物。在银山矿床的上部（尤其是九区Ｚｎ－Ｐｂ矿化带）还发育高岭石化和重晶石化蚀变。它们是受蒸气加热的酸性地下水淋滤作用的产物，矿化带成矿体系物理化学条件的急剧变化极可能与这种酸性地下热水的混入有关。
An unsymmetrical zone is developed in north and south parts of the Yinshan polymetallic deposit,Jiangxi.The southern zonation is comprised of Cu-Pb-Zn belt,silver-bearing Pb-Zn belt and Pb-Ag belt at the Nanshan area from Cu(Au) belt at Jiuqu to south,which form distinct mineral association and evolution sequence.Metallogenesis is involved with everlasting evolution of fluid.In the north,the Zn-Pb belt at Jiuqu was formed by rapid deposition from saturated fluid and fluctuation condition. Kaolinization and baritization developed at the top of deposit resuls from leaching of heated acid underground water which might be responsible for sharp change of geophysico-geochemical conditions.
出处
《矿产勘查》
1998年第4期2-6,共5页
Mineral Exploration
基金
国家自然科学基金
中国科学院矿床地球化学开放研究实验室基金
