|本期目录/Table of Contents|

[1]贾润幸,方维萱.云南个旧锡多金属矿床石榴石地球化学特征及其指示意义[J].地球科学与环境学报,2016,38(05):578-586.
　JIA Run-xing,FANG Wei-xuan.Geochemical Characteristics and Their Significance of Garnets from Gejiu Sn Polymetallic Deposit of Yunnan[J].Journal of Earth Sciences and Environment,2016,38(05):578-586.
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云南个旧锡多金属矿床石榴石地球化学特征及其指示意义(PDF)
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第38卷
期数:
2016年第05期
页码:
578-586
栏目:
基础地质与矿产地质
出版日期:
2016-09-15

文章信息/Info

Title:
Geochemical Characteristics and Their Significance of Garnets from Gejiu Sn Polymetallic Deposit of Yunnan
文章编号:
1672-6561(2016)05-0578-09
作者:
贾润幸; 方维萱
1.有色金属矿产地质调查中心，北京 100012；2.北京矿产地质研究院，北京 100012
Author(s):
JIA Run-xing;  FANG Wei-xuan
1. China Non-ferrous Metals Resource Geological Survey, Beijing 100012, China;2. Beijing Institute of Geology for Mineral Resources, Beijing 100012, China
关键词:
石榴石; 环带构造; 矿物地球化学; 电子探针分析; 矽卡岩; 渗滤交代; 锡矿; 云南
Keywords:
garnet;  zonal structure;  mineral geochemistry;  electron microprobe analysis;  skarn;  infiltration metasomatism;  Sn deposit;  Yunnan
分类号:
P59;P618.44
DOI:
-
文献标志码:
A
摘要:
云南个旧锡多金属矿床接触带中的石榴石通过电子探针分析主要为钙铝榴石和钙铁榴石，含少量的镁铝榴石和锰铝榴石。从接触带内侧到外侧，石榴石中的Fe元素总体上具降低趋势，而Al和Mn元素具明显的增大趋势，Sn元素具弱的增大趋势，这主要与钙铁榴石成分的逐渐降低和锰铝榴石成分的逐渐增加有关。在接触带内侧的石榴石可见环状生长纹，Sn含量小于0.03%；在接触带外侧的石榴石可见环状分带构造，Sn含量为0.50%～0.55%。石榴石环状成分分带反映出成矿流体化学成分的波动性，这主要与岩浆期后热液在对围岩进行渗滤交代的过程中物理化学条件发生周期变化有关，在接触带外侧比内侧更有利于Sn的富集和沉淀。
Abstract:
The electron microprobe analysis results show that the garnets in the contact zones between granite and carbonate from Gejiu Sn polymetallic deposit of Yunnan are mainly grossularite, andradite and a few of pyrope and spessartite. From the inner to outer contact zones, the content of Fe of garnet has the decreasing trend, but the contents of Al and Mn have the obviously increasing trend, and the content of Sn has the weakly increasing trend. The trend is mainly related to the decrease of andradite in the inner side and the increase of spessartite in the outer side. The content of Sn of garnet with ring growth lines in the inner contact zone is less than 0.03%; the content of Sn of garnet with zonal structure in the outer contact zone is 0.50%-0.55%. The ring growth lines and zonal structure of garnet imply the chemical composition volatility of metallogenic fluid. It is related to the periodicity change of physical and chemical conditions in post-magmatic hydrothermal infiltration metasomatism between granite and surrounding rocks. Compared with the inner contact zone, the outer contact zone is more favorable to the enrichment and precipitation of Sn.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-05-25
基金项目:科技部科研院所技术开发研究专项资金项目(2008EG15074,2011EG15022)
作者简介:贾润幸(1969-),男,陕西西安人,教授级高级工程师,理学博士,E-mail:chookdog@163.com。
更新日期/Last Update: 2016-09-30