| 赣北石门寺钨多金属矿床同位素地球化学研究 |
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| 关键词:Shimensi tungsten deposit isotope source of ore-forming materials northern Jiangxi province |
| 基金项目:江西省地质矿产勘查开发局九一六大队地质科研项目(编号: 2011-87) |
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| Isotopic Geochemical Characteristics of the Shimensi Tungsten-polymetallic Deposit in Northern Jiangxi Province |
| The Shimensi tungsten polymetallic deposit is a recently discovered superlarge deposit in the Mesozoic Cu-Mo-Au-Ag-Pb-Zn ore belt of Jiangnan block within Lower Yangtze metallogenic province. The ore bodies are thick with gentle attitude, approximately parallel to the contact surface between the biotite granodiorite and the top of the porphyraceous biotite granite. In addition, the external contact zone is an important contact type, and the major type of the mineralization is veinlet disseminated scheelite. Based on sulfur, lead and carbon isotopic characteristics, this paper studied the origin and evolution of the ore-forming material. The results show that the δ34SV-CDT values of the sulfide ore range from –2.53‰ to –0.91‰ with an average of –1.65‰. It is estimated that the sulfur origin is closely related to the magmatic sulfur. The 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb ratios of sulfide ore range respectively within 18.109~18.268, 15.586~15.708 and 38.208~38.715. In combination with tectonic patterns of lead isotope and related parameters, the lead composition indicates that the metallogenic materials were closely related to magmatism, and their lead was mainly derived from the lower crust with the addition of some upper crust matter. Carbon and oxygen isotopic compositions of calcite show that carbon in the ore-forming fluid was mainly derived from the lower crust or the upper mantle. |
| XIANG Xin-kui,WANG Peng,SUN De-ming,ZHONG Bo.2013.Isotopic Geochemical Characteristics of the Shimensi Tungsten-polymetallic Deposit in Northern Jiangxi Province[J].Acta Geoscientica Sinica,34(3):263-271. |
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