...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Economic geology and the bulletin of the Society of Economic Geologists >DEPLETION AND ENRICHMENT ZONES IN THE BENDIGO GOLD FIELD: A POSSIBLE SOURCE OF GOLD AND IMPLICATIONS FOR EXPLORATION
【24h】

DEPLETION AND ENRICHMENT ZONES IN THE BENDIGO GOLD FIELD: A POSSIBLE SOURCE OF GOLD AND IMPLICATIONS FOR EXPLORATION

机译：本迪戈金矿田中的枯竭和富集带：可能的金矿资源和勘探意义

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A regional lithogeochemical survey in the Bendigo region of central Victoria, Australia, covering an area of 3,750 km~2 and including the giant Bendigo gold field and other large regional gold fields such as Maldon, Castlemaine, and Fosterville, was completed in 2004 by Ionex Pty Ltd. A total of 142 rock samples were collected and analyzed for gold and associated elements. Extensive areas having an anomalously low gold content (termed "depletion zones") were detected in the vicinity of known gold fields and constitute a large proportion of the surveyed area. The results show that the gold content in the depletion zones is 70 percent below regional background levels. The Bendigo gold field itself is located within a positive gold anomaly (enrichment zone) with an average value of 14 ppb in all rock types and an extent of approx. 100 km~2. To the north is a depletion zone on the order of 700 to 800 km~2, with an average gold content of less than 0.5 ppb in all rock types. In total, the gold enrichment and depletion zones occupy an area of more than 1,000 km~2 against a regional background of 0.7 to 4.7 ppb Au (avg 1.29 ppb). If this depletion zone extends to a depth of 2 km, the volume of depleted rock would be at least 1,400 km~3 and the extent of apparent depletion would be 3,000 to 4,000 tonnes (t) of gold. The quantum of apparent gold depletion at Bendigo is on the same order of magnitude as the gold enrichment in the Bendigo gold field and associated dispersion haloes (3,000 t Au). Substantial depletion zones are also present adjacent to the other important gold deposits within the survey area. The presence of extensive gold depletion zones adjacent to the major gold deposits of central Victoria raises the possibility that these rocks were a source of gold in the deposits. These findings provide possible new criteria for the appraisal of prospective regions.
机译：Ionex于2004年完成了在澳大利亚中部维多利亚州本迪戈地区的一次区域岩石地球化学调查，覆盖了3,750 km〜2，其中包括巨大的本迪戈金矿田和其他大型区域金矿田，例如Maldon，Castlemaine和Fosterville。 Pty Ltd.总共收集了142个岩石样品并分析了金和相关元素。在已知的金矿场附近发现了具有异常低的金含量的广泛区域（称为“耗尽区”），占调查区域的很大一部分。结果表明，耗尽区的金含量比区域背景水平低70％。本迪戈金矿田本身位于一个正金异常（富集区）内，所有岩石类型的平均值为14 ppb，范围约为。 100公里〜2。北部是一个约700至800 km〜2的枯竭带，所有岩石类型的平均含金量均小于0.5 ppb。总的来说，金富集和耗尽区的面积超过1,000 km〜2，而金背景的金背景为0.7至4.7 ppb（平均1.29 ppb）。如果这个枯竭带延伸到2 km的深度，那么枯竭的岩石的体积将至少为1,400 km〜3，表观枯竭的程度将为3,000至4,000吨（吨）金。本迪戈的表观金消耗量与本迪戈金矿场中的金富集量和相关的分散晕圈（3,000吨金）数量级相同。在调查区内其他重要的金矿床附近也有大量的枯竭区。与维多利亚州中部主要金矿床相邻的广阔的金耗竭区的存在，增加了这些岩石成为矿床金源的可能性。这些发现为潜在地区的评估提供了可能的新标准。

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