首页> 外文会议>Seventh Biennial SGA Meeting Vol.1 Aug 24-28, 2003 Athens/Greece >Carbon dioxide bearing melt inclusions within a gold-mineralized felsic granite
【24h】

Carbon dioxide bearing melt inclusions within a gold-mineralized felsic granite

机译:金矿化长英质花岗岩中含二氧化碳的熔融包裹体

获取原文
获取原文并翻译 | 示例

摘要

Disseminated gold mineralization at Timbarra forms flat-lying ore bodies constrained beneath a fine-grained carapace within the core of a zoned 249-252 Ma I-type granite. Emplacement at mesozonal levels (~7km) resulted in the development of a late stage volatile bearing (carbon dioxide-rich, chlorine-poor) magmatic fluid that was constrained by lithostatic conditions beneath a fine-grained 'quenched' carapace. The magmatic-hydrothermal fluids that ponded below the carapace formed unidirectional solidification textures (USTs), pegmatite lenses, miarolitic cavities, interconnected miarolitic cavities (IMTs) and vein-dykes. These variably gold-mineralized magmatic-hydrothermal transition textures contain carbon dioxide-bearing melt inclusions and low-salinity carbon dioxide-rich aqueous inclusions, whereas moderate to high-salinity aqueous inclusions are completely absent. The detection of carbon dioxide within melt inclusions using laser Raman spectroscopy is a significant observation supporting a magmatic origin for carbon dioxide in intrusion-related gold deposits.
机译:Timbarra的散布金矿化形成了平坦的矿体,这些矿体被约束在249-252 Ma I型花岗岩带的核心内的细粒甲壳之下。在中地带水平(约7公里)的进驻导致了后期挥发性岩浆(富含二氧化碳,贫氯)岩浆流体的发展,该岩浆流体受细粒“淬灭”甲壳下的岩石静力学条件的约束。堆积在甲壳下方的岩浆热液形成了单向凝固纹理(USTs),伟晶岩,微斜孔,相互连通的微斜孔(IMT)和脉脉。这些可变的金矿化岩浆-水热过渡织构包含含二氧化碳的熔融包裹体和低盐度的富含二氧化碳的含水包裹体,而完全不存在中至高盐度的含水包裹体。使用激光拉曼光谱法检测熔融夹杂物中的二氧化碳是一项重要的发现,支持了与侵入有关的金矿床中二氧化碳的岩浆成因。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号