地质力学学报2016，Vol.22Issue(2)：338-345,8.
西藏波龙斑岩铜金矿床成矿流体物理化学条件
STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET
摘要
Abstract
Using Linkam THNSG600 dating and calculating by experience formulas, this paper discusses the fluid inclusion characteristics of Bolong porthyry copper-gold deposit in Tibet, which is beneficial to the migration of the main ore-forming element Cu, and the metallogenic process includes four periods: magma-advanced stage, magnetite-molybdenite period, chalcopyrite-pyrite period and anhydrite-pyrite period. It shows that the type of fluid inclusion is mainly the three-phases inclusion including NaCl and metal sulfide daughter minerals. The ore-forming fluid forms in high temperature (232 ~549 ℃) and low pressure (1. 40 × 105 ~234. 41 × 105 Pa), with high salinity (28. 65~52. 16wt% NaCl) and middle-high density (1. 0683 ~1. 1598 g/cm3 ). Along with the metallogenic process, the fluid fugacity and activity gradually reduce in each stages, while the values of pH and Eh increase. The element Cu mainly exits in the form of Cu ( H2 S) ( HS) 2-, which shows that Cu is easier to mineralization in high tempreture and acidic fluids.关键词
流体包裹体/物理化学条件/斑岩铜金矿床/波龙Key words
fluid inclusion/physicochemistry conditions/porphyry copper-gold deposit/Bolong分类
地质学引用本文复制引用
霍艳,李丹..西藏波龙斑岩铜金矿床成矿流体物理化学条件[J].地质力学学报,2016,22(2):338-345,8.基金项目
四川省教育厅项目（13ZB0066）；成都理工大学中青年骨干教师培养计划资助项目（JXGG201501）；成都理工大学“矿物学、岩石学、矿床学”国家重点（培育）学科建设项目 （）
