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首页> 外文期刊>Exploration and Mining Geology >A Fluid Inclusion and Stable Isotopic Investigation of the Boston Lode-Gold Deposit, Hope Bay Volcanic Belt, Nunavut
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A Fluid Inclusion and Stable Isotopic Investigation of the Boston Lode-Gold Deposit, Hope Bay Volcanic Belt, Nunavut

机译：努纳武特的霍普湾火山岩带的波士顿露头金矿床的流体包裹体和稳定同位素研究

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摘要

The Boston deposit is a recently discovered Archean lode-gold deposit located approximately 700 km northeast of Yellowknife, in the southern portion of the Hope Bay volcanic belt. Primary H2O-CO2-NaCl fluid inclusions associated with gold mineralization at Boston are of low salinity (4.6 ± 1.4 eq. wt.% NaCl, n = 182) and contain pure CO2. Homogenization temperatures of liquid-phase inclusions average 270° ± 33°C (n = 141), but some fluid inclusion assemblages contain coexisting liquid- and vapor-phase inclusions that homogenize near critical conditions, suggesting phase separation. In these groups, liquid-phase inclusions homogenized at 299° ± 25°C (n = 24), and vapor-phase inclusions homogenized at 338° ± 28°C (n = 18). These temperatures overlap within error, and a median temperature of ~320°C is taken as representative of trapping conditions within the veins. An approximate pressure of 2–3 kbar was estimated from fluid inclusion isochores at this temperature.
机译：波士顿矿床是最近发现的太古宙金矿床，位于霍普湾火山带南部的耶洛奈夫东北约700公里处。波士顿与金矿化 相关的主要 H 2 O-CO 2 -NaCl流体包裹体的盐度低（ 4.6±1.4 eq。wt。％NaCl， n = 182），并且含有纯CO 2 。 液相夹杂物的均质温度平均为270°±33°C（n = 141），但某些流体包裹体组合包含并存的 和在临界 条件附近均质的气相夹杂物，表明相分离。在这些组中，液相 夹杂物在299°±25°C（n = 24）下均质， 和汽相夹杂物在338°± < / sup> 28°C（n = 18）。这些温度在误差范围内重叠， ，并且中位温度为〜320°C作为静脉内捕获条件的代表 。从该温度下的流体包裹体等渗线 估算出大约2-3 kbar的压力 。

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    《Exploration and Mining Geology》 |2006年第2期|101-121|共21页
  • 作者

    J.U. STEMLER; J.P. RICHARDS; K. MUEHLENBACHS;

  • 作者单位

    Dept. of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3.;

    Dept. of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3.;

    Dept. of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3.;

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