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研究甲玛铜多金属矿床岩浆结晶演化特点、岩浆热液过渡与矿化的关系。利用Linkam TS1500热台对甲玛矿床含矿斑岩石英斑晶中的熔融包裹体进行鉴定、均一温度测定,采用电子探针与同步辐射X射线荧光微探针对石英斑晶中的熔融包裹体进行常量元素及微量元素的测定,结果表明,含矿斑岩体形成温度为630~880℃。Na、Ca等元素易富集于岩浆挥发组分中,挥发组分饱和出溶形成高温、高盐度流体,成矿元素从最早的岩浆结晶分异阶段开始,强烈地选择性进入挥发性气相中进行迁移,出溶的挥发组分中具有成矿元素的初步富集。矿床在成因上与斑岩-夕卡岩成矿系统中的岩浆-热液成矿作用密切相关。
The relationship between magma crystallization evolution and magmatic hydrothermal transition and mineralization in Jiama copper polymetallic deposit was studied. The melt inclusions in quartz porphyrite of the ore-bearing porphyry in the Jiama ore deposit were identified by the Linkam TS1500 thermal station. The temperature of the melt inclusions was determined by electron probe and synchrotron radiation X-ray fluorescence microprobe. The determination of major elements and trace elements showed that the formation temperature of the ore-bearing porphyry was 630 ~ 880 ℃. Na, Ca and other elements are easily enriched in the magma volatile components, the volatile components of the saturated solution of high temperature and high salinity fluid formation, ore-forming elements from the earliest stage of magma crystallization differentiation, strongly selective into the volatile gas In the volatile components of the dissolution of the initial enrichment of metallogenic elements. The genesis of the deposit is closely related to the magmatic-hydrothermal mineralization in the porphyry-skarn metallogenic system.