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首页> 外文学位 >Characterization and significance of lithogeochemical, stable isotope and mineral alteration halos in the Hollinger-McIntyre gold deposit, Timmins Ontario, Canada.
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Characterization and significance of lithogeochemical, stable isotope and mineral alteration halos in the Hollinger-McIntyre gold deposit, Timmins Ontario, Canada.

机译：加拿大安大略省Timmins的Hollinger-McIntyre金矿床的岩石地球化学，稳定同位素和矿物蚀变晕的特征及意义。

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摘要

Two distinct mineralizing fluids formed the Hollinger-McIntyre-Coniaurum deposit. The earliest fluid formed the disseminated Cu-Au-Mo zone in the Pearl Lake Porphyry (PLP). The alteration pattern in the felsic rocks of the PLP is characterized by increased amounts of K2O, Au, Cu, Mo, W, Sn, K/Al, Sericite/Chlorite Index (SCI) and Sericite Alteration Index and the removal of CaO. The H2O-CO2-NaCl mineralizing fluid involved had a temperature of 342 to 389°C and a delta18O water composition of 11.68 to 12.68‰.;The H2O-CH4-CO2-NaCl mineralizing fluid that formed the gold deposits associated with the Hollinger Shear Zone (HSZ) during northwest-southeast compression had an estimated temperature of 290°C and a delta18Owater 4.60‰. These auriferous fluids are associated with increases in As, CO2, and CO2/CaO and removal of Na2O from rocks in and above the HSZ. They are isotopically similar to those that formed the Giant and Colomac gold deposits.;A third alteration type is present and has added Na2O to the metavolcanic rocks. The addition of Na2O probably occurred during spilitic alteration of volcanic rocks when they were deposited in a subaqueous marine environment.
机译：两种不同的矿化流体形成了Hollinger-McIntyre-Coniaurum矿床。最早的流体形成了珍珠湖斑岩（PLP）中的散布的Cu-Au-Mo带。 PLP的长英质岩石中的蚀变模式的特征是增加的K2O，Au，Cu，Mo，W，Sn，K / Al，绢云母/亚氯酸盐指数（SCI）和绢云母蚀变指数以及CaO的去除量。所涉及的H2O-CO2-NaCl矿化液温度为342至389°C，δ18O水组成为11.68至12.68‰.; H2O-CH4-CO2-NaCl矿化液形成了与Hollinger剪切有关的金矿床西北-东南压缩期间的带（HSZ）的估计温度为290°C，δ18O水为4.60‰。这些含铁流体与As，CO2和CO2 / CaO的增加以及从HSZ内外的岩石中Na2O的去除有关。它们在同位素上与形成巨人和科洛马克的金矿床相似。;第三种蚀变类型存在，并向准火山岩中添加了Na2O。 Na2O的添加可能是在火山岩沉积在水下海洋环境中时发生的自发性蚀变。

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  • 作者

    Washington, Gibran.;

  • 作者单位

    Wayne State University.;

  • 授予单位 Wayne State University.;
  • 学科 Geology.;Geochemistry.
  • 学位 M.S.
  • 年度 2008
  • 页码 226 p.
  • 总页数 226
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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