原文服务方: 地球化学学报(英文)       
摘要:
The Nanyangtian skarn-type scheelite deposit is an important part of the Laojunshan W–Sn polymetallic metallogenic region in southeastern Yunnan Province, China. The deposit comprises multiple scheelite ore bodies; multilayer skarn-type scheelite ore bodies are dominant, with a small amount of quartz vein-type ore bodies. Skarn minerals include diopside, hedenbergite, grossular, and epidote. Three mineralization stages exist: skarn, quartz–scheelite, and calcite. The homogenization temperatures of fluid inclusions in hydrothermal minerals that formed in different paragenetic phases were measured as follows: 221–423℃ (early skarn stage), 177–260℃ (quartz–scheelite stage), and 173–227℃ (late calcite stage). The measured salinity of fluid inclusions ranged from 0.18% to 16.34% NaCleqv (skarn stage), 0.35%–7.17% NaCleqv (quartz–scheelite stage), and 0.35%–2.24% NaCleqv (late calcite vein stage). Laser Raman spectroscopic studies on fluid inclusions in the three stages showed H2O as the main component, with N2 present in minor amounts. Minor amounts of CH4 were found in the quartz–scheelite stage. It was observed that the homogenization temperature gradually reduced from the early to the late mineralization stages; moreover, δ13CPDB values for ore-bearing skarn in the mineralization period ranged from -5.7‰ to -6.9‰ and the corresponding δ18OSMOW values ranged from 5.8‰ to 9.1‰, implying that the ore-forming fluid was mainly sourced from magmatic water with a minor amount of meteoric water. Collectively, the evidence indicates that the formation of the Nanyangtian deposit is related to Laojunshan granitic magmatism.
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篇名 Genesis of the Nanyangtian scheelite deposit in southeastern Yunnan Province, China: evidence from m
来源期刊 地球化学学报(英文) 学科
关键词 Fluid inclusion C–O isotopes Skarn Scheelite deposit Nanyangtian
年,卷(期) 2018,(4) 所属期刊栏目
研究方向 页码范围 614-631
页数 17页 分类号
字数 语种 英文
DOI 10.1007/s11631-017-0257-0
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Fluid inclusion
C–O isotopes
Skarn
Scheelite deposit
Nanyangtian
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引文网络交叉学科
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期刊影响力
地球化学学报(英文)
双月刊
2096-0956
52-1161/P
大16开
贵州省贵阳市观水路46号地球化学研究所
1982-01-03
英文
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294
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0
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