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鄂西北银洞沟铅锌-银矿床的流体包裹体研究 总被引:3,自引:0,他引:3
本文研究银洞沟铅锌-银矿床流体包裹体的特征、均一温度、盐度和流体成分,对矿床形成的温度、压力、矿化流体性质及其演化规律等成因问题作出了解释。 相似文献
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Fluid inclusion studies were made on the basis of the geological data on the strata-bound ore de-posits of China including those of Pb,Zn,Au,Ag,Sb,U,Hg,W,quartz-crystal and sparry-calcite.An attempt was made to approach the model of formation for each type of ore depos-its by considering the material sources,the migration of fluids and the conditions of mineralization.It is found that ore-forming fluids (especially H2O)originate as heated underground water reacts with the wallrocks and dissolves Na^ ,Ca^2 ,K^ ,Cl^ ,HCl^- and Mg^2 .The ore fluids are mainly of NaCl-Ca-HCO3-H2O system with salinities ranging from 4to 14wt.%.NaCl equivalent and densities ranging from 0.9 to 1.0g/cm^3.It may be concluded that the deposits were formed at temperatures ranging from 150 to 250℃ under pressures from 300 to 1000 bars.Ore deposition may have been controlled by temperature and pressure or by the mixing among different fluids. 相似文献
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层控夕卡岩及有关矿床形成过程的稀土元素行为——以安徽冬瓜山矿床为例 总被引:6,自引:3,他引:6
对安徽省冬瓜山层控夕卡岩型铜(金)矿床中穿层方向上不同蚀变程度的大理岩,顺层方向上距岩体远近不同但垂向深度的块状石榴子石夕卡岩及其主矿物石榴子石,不同演化阶段的石英及矿石等到的REE特征进行了系统研究,结果显示,在穿层方向上,大理岩被交代的程度愈深其稀土总量(∑REE)愈高,Eu负异常愈显著,尽管,夕卡岩全岩的RE分布模式与原岩(大理岩)相似,但前者的稀土总量(∑REE)远高于后者,且Eu异常更为显著,显然不是继续承原岩的REE特征所致,而是受控于其主矿物石榴子石的REE特征,后者又由参与交代作用的岩浆热液REE所决定,热液中的REE具有缓和右倾型分布模式,LREE富集,较显著的Eu负异常等基本特征,石榴子石晶体基本承袭了热液的REE特征,REE的空间变化特征结果地层的构造特征可以揭示夕卡岩及相关矿体形成过程中流体的输运径及输运方式,REE的研究有助于深化对层控夕卡岩及其相关矿床形成过程的认识。 相似文献
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铜石矿田陈家坝地区断裂构造地球化学特征及定位预测 总被引:6,自引:4,他引:6
陈家坝地区是铜厂矿田中重要的金属成矿区。在划分矿田构造体系和厘定成矿构造体系的基础上,深入阐述了铜厂矿田陈家坝地区断裂构造地球化学特征,认为陈家坝、陈家坝南和秦家砭、红土石构造地球化学异常集中区是进行铜金多金属矿预测的有利靶位。 相似文献
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