云南思茅-南坪盆地边缘造山带金(铜)成矿流体动力学

曹志敏; 郑建斌; 徐则民; 任建国; 李保华; 覃功炯

Volume 27 Issue 4

Jul. 2002

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Article Navigation > Earth Science > 2002 > 27(4): 425-434

CAO Zhi-min, ZHENG Jian-bin, XU Ze-min, REN Jian-guo, LI Bao-hua, TAN Gong-jiong, 2002. Au (Cu) Ore-Fluid Dynamics in Bordering Orogenic Belt of Simao-Nanping Basin, Yunnan Province. Earth Science, 27(4): 425-434.

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Au (Cu) Ore-Fluid Dynamics in Bordering Orogenic Belt of Simao-Nanping Basin, Yunnan Province

1.
Faculty of Earth Sciences, Ocean University of Qingdao, Qingdao 266002, China
2.
State Key Laboratory of Mineral Deposits Research in Nanjing University, Nanjing 210005, China
3.
Faculty of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
4.
Faculty of Earth Sciences and Mineral Resources, China University of Geosciences, Beijing 100029, China

Received Date: 2001-11-19
Publish Date: 2002-07-25

Abstract

Abstract

We studied geologic and geochemical characteristics and physical chemical condition of the Au (Cu) ore fluid, bordering the orogenic belt of the Simao Nanping basin. The studies of isotopic tracing on H-O, C-O, He-Ar, T and p, composition in the mineral inclusions testing and their physical chemical parameter calculation in the fluid inclusion indicate that ore forming fluid is derived from meteoric water and that the ore forming materials may be from crustal source and other origin fluid joined. The fluid presents some characteristics such as epithermal, high salinity, alkalescency and deoxidizescency, Na⁺ > K⁺ and Ca²⁺+Mg²⁺, Cl^- > F^- in the compositions. In the fluid, S^2- is dominated and plays a key role in transference and precipitation of Au. The hydrodynamic field and discharge conditions are simulated by paleo hydrogeologic method with a stress on the control of migration and distribution pattern of paleo hydrodynamics field over the multi genetic ore fluid. The ore fluid of high energy and high degree of mineralization is discharged in the low hydrodynamics pressure area and precipitated to form the ore after a long time of repeated leaching and permeation, driven by magmatic dynamics and tectonics.
- Au (Cu) deposit,
- ore fluid,
- orogenic belt,
- Simao Nanping basin of Yunnan Province

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References(15)

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