云南保山核桃坪铅锌多金属矿床辉石族矿物成因矿物学研究

The Mineralogy Study of the Minerageny of Pyroxene Group from Baoshan Hetaoping Lead-zinic Polymetallic Deposit,Yunnan Province

云南保山核桃坪铅锌多金属矿床的成因一直存在争议,通过电子探针分析对核桃坪铅锌多金属矿床主矿体1号矿体中的辉石进行分析并进行晶体化学计算认为核桃坪铅锌多金属矿床中的辉石主要以锰-铁次透辉石、铁次透辉石为主,个别为次透辉石及锰-钙铁辉石。将核桃坪铅锌多金属矿床中的辉石与国内一些典型的矽卡岩铅锌多金属矿床中的辉石矿物成分特征及Mn/Fe比值、Mg/Fe比值特征进行对比,认为核桃坪铅锌多金属矿床属接触交代型钙矽卡岩矿床,矿床纵向分带由地表至深部为Pb-Zn-Cu-Fe矽卡岩分带系列,矿床中的辉石含锰可认为是铅锌矿化的重要标志。

The cause of Baoshan Hetaoping （ Yunnan Province） lead-zinpolymetallideposihaalwasybeen in controversial. Electron microprobe analysiwaconducted on pyroxene of No. 1 orebody of the main orebody in Hetaoping lead-zinpolymetallideposit, and crystal chemical calculations, which suggested thathe pyroxene of thideposiimainly consisted of manganese-iron diopsideand iron diopsides, while some individual ihypo-diop- side and manganese-calcium and iron pyroxene. Comparison of pyroxene mineral composition characteristicand Mn / Fe ratio of Mg / Fe ratio between the Hetaoping polymetallideposiand the typical skarn lead-zinpoly- metallidepositrevealed thaHetaoping lead-zinpolymetallideposiicalcium skarn deposiof contacmetaso- matism. The vertical zone of the deposifrom surface to deep iof Pb-Zn-Cu-Fe skarn series, and the pyroxene with manganese can be considered aan importanindicatoof lead-zinmineralization.