Characterization and origin of gold mineralization at the providence mine

该提案旨在研究普罗维登斯金矿的金矿化起源，普罗维登斯金矿是“母矿脉金矿带”中的一系列高品位矿床之一，该金矿带是位于内华达州山脉西坡的一个200公里长的金石英脉系统。尽管该地区有开采的历史，但对“母矿脉金矿带”的科学研究却少得惊人，特别是对矿脉的详细结构和矿物学分析更是缺乏。现有的文献几乎全是区域性的研究或总结，而且很难确定其中许多文献的相关性，因为这些团体和结构的名称和定义已被反复修改。为了有效地指导进一步的勘探，发起公司需要知道：（1）矿床是如何形成的;（2）褶皱、断层、剪切带等地质构造与含金矿脉的关系，（3）金矿的赋存矿物及其相互关系，（4）存款的分类及其与其它金矿的比较。这种分析有两个主要的好处：（1）它将有助于建立存款的成因模型，着眼于预测在哪里可能发现额外的静脉;（2）该公司可借此发展一个冶金循环，以尽量回收黄金。（绘图和采样），然后是光学岩石学、扫描电子显微镜、电子探针微量分析和X射线衍射技术。将对收集到的数据进行评估，以确定哪种存款模型与数据最一致，或者新的存款模型是否更合适。在任何一种情况下，普罗维登斯金矿特有的元素都将被仔细检查。

The proposal is to study the origin of the gold mineralization in the Providence mine, one of a number ofhigh-grade deposits in the "Mother Lode Gold Belt", a 200-km-long system of gold-quartz veins located on thewestern slope of the Sierra Nevada mountain range. Despite the history of mining in the area, suprisingly littlescientific research has been done on the "Mother Lode Gold Belt", and in particular, there exists no detailedstructural and mineralogical analysis of the veins. The literature that is available consists almost entirely ofregional studies or summaries, and it is difficult to determine the relevance of many of these because the namesand definitions of the groups and structures have been repeatedly revised.In order to efficiently direct further exploration the sponsoring company needs to know: (1) how the depositformed; (2) the relationship between geological structures such as folds, faults, and shears and the gold-bearingveins; (3) minerals the gold occurs with and their relationships; and (4) the classification of the deposit andhow it compares to other gold deposits. There are two primary benefits of such an analysis: (1) it will aid indeveloping genetic model of the deposit, with an eye towards predicting where additional veins may be found;(2) it will allow the company to develop a metallurgical circuit for maximum gold recovery.The proposed project will involve fieldwork (mapping and sampling) followed by optical petrography,scanning electron microscopy, electron probe microanalysis, and X-ray diffraction techniques. The gathereddata will be evaluated to determine which deposit model is most consistent with the data, or if a new depositmodel is more appropriate. In either case, elements idiosyncratic to the Providence Gold Mine will be closelyexamined.