总第177期 2010年12月
文章编号：10099700(2010)06002504
南方金属 SOUTHERN METALS
Sum.177 December2010
詹州市南江村铅锌矿区花岗岩石学特征研究
欧阳海松，刘藏，胡祥照
（中南大学地学与环境工程学院，湖南长沙410083）
摘要：南江村铅锌矿区地质筒单，地质工作薄弱.作者从岩石学和岩石化学着手，系统研究了南江村铝锌矿矿区 6%，具硅饱和的特征；Al,0，含量为14.14%~15.06%，铝饱和指数（A/CNK)为1.13~1.18，属于铝过饱和系列，其岩浆源区岩石成分可能为砂屑岩；里特曼指数α为2.33~2.01，均为钙碱性；研究区花岗岩相对富钾，反映岩体遭
受较低的氧化和剩蚀；初步认为研究区的花岗岩为S型花岗岩关键词：花岗岩；岩石学；岩石化学；海南
中图分类号：P613
文账联标识码：A
Apetrological studyofthegraniteinNanjiangPb-Zndeposit
OUYANC Hai-song, LIU Shan, HU Xiang-zhao
(School of Geoscience and Environmental Engineering,Central South University, Changsha 410083 ,Hunan)
Abstract : The geological feature in Najiang Pb-Zn mine area, Danzhou, Hainan province is simple,though the geological in vestigation in this area is lacking. A petrological and petrochemical study of the characteristics of the granite in the area was therefore undertaken,and the results are presented in the article. It was found that the granite in the Pb-Zn deposit was thc one with coarse-grained biotite and medium grain size,and its SiO, content was 73. 11% ~ 70. 9%,thus being Si-saturated. In addition,its content of Al, O, was 14. 14% ~ 15. 06 %which yielded an Al saturation index ( A/CNK) of 1. 13 ~ 1. 18, thus being Al-supersaturated. The rocks in the magmatic source of the granite could be assumed to be the psammite, With s rittmann index (o)of 2. 33 ~ 2. O1 ,the granite was calc-alkaline. The granite in the investigated area was K-rich,thus indi-cating that the rock subjected to weak oxidation and erosion. It is preliminarily concluded that the granite was of the S-type. Key words: granite; petrology; petrochemistry; Hainan
南江铅锌矿位于海南省詹州市镜内，属詹州市蓝洋镇管辖，位于蓝洋镇（蓝洋农场)330°方向.南江村铅锌矿位于南江村南侧的水塘边，之前为某广东老板私采研究区内的石灰岩，用于冶炼钢铁的熔剂，开采石灰岩的过程中发现有多组铅锌矿体，其中以锌矿为主
地质概况 1
南江村铅锌地质较为简单（图1)，
区内出露的地层主要有志留系下统空列村组、石炭系下统南好组及第四系，缺失志留系上统及泥收稿日期：2010-0415
盆系地层，所以空列村组与南好组星不整合接触，其整合线均被第四系农田覆盖.南江村铅锌矿体主要赋存与志留系下统空列村组的结晶灰岩中，其灰岩地表出露的面积有限，仅在南江村南侧的鱼塘见有大块出露，其余均为呈团块状出露
区内构造主要为皱裙及断裂构造，褶皱构造不发育，为一单斜地层；断裂构造则十分发育，主要有北北东向、北西向、南北向及近东西向断层，节理构造也较发育.区内最为主要的断裂构造为北东向，因此本区的山脉亦星北东向展布
区内岩浆岩浆出露较为广泛，约占研究区面积
基金项目：中南大学创新选题（中大研字[2009]14号2009sxt012）
作者简介：欧阳海松(1985-），男，中南大学地学与环境工程学院硕士研究生，研究方向：矿产督查与勘探