福建武夷山桃棋矿区石墨矿床地质特征及成因探讨

Probe into geological features and genesis of graphite deposit of Taoqi mining area in Wuyishan city,FuJian

桃棋矿区地处闽西北隆起带之浦城-洋源隆起中部,目前已发现20个晶质石墨矿体。石墨矿体赋存于古元古代麻源岩群大金山岩组第二、三岩性段中,主要含矿岩性为黑云斜长变粒岩、硅线石英黑云片岩、硅线黑云石英片岩、长石石英黑云片岩、长石黑云石英片岩等,矿体呈层状或似层状分布,产状与地层产状一致。矿床成因类型为沉积变质(后期改造)型石墨矿床。

Taoqi graphite deposit is located in the central part of the Pucheng-Yangyuan uplift in uplift belt of northwest Fujian.Graphite orebodies occur in the second and third lithologic section of Dajinshan formation of Paleoproterozoic Maoyuan group.The main ore-bearing lithology is biotite plagioclase granulite,Sillimanite-quartz-biotite schist,Sillimanite-biotite-quartz schist,feldspar-quartz-biotite schist and feldspar-biotite-quartz schist。The orebodies are distributed in stratiform or stratoid structure,and the occurrence is consistent with the stratum occurrence.The genetic type of the graphite deposit is sedimentometamorphic(later reformed)deposit.