The controls on precious metals content of massive sulfide deposits

在2020财政年度，研究工作按计划继续进行。在多次短途旅行中，在秋田县大鱼岛附近的Hokuroku地区采集到了含有黑子矿石的新的火山岩样本。新的分析已经完成，其中一些是在秋田大学完成的，另一些是在外部实验室完成的。这些分析包括从野外采集的火山岩的化学分析，以及来自秋田大学采集的矿石样品。化学分析可以了解分析样品中金属(包括锌、铅、铜和其他)的丰度。利用秋田大学提供的仪器完成了对主要矿物的矿物分析。此外，作为学生项目的一部分，已经完成了矿物鉴定分析。目前正在汇编迄今已有的成果。新的结果将与以前发表的分析进行比较。一篇关于Hokuroku地区黑矿地质的论文最近发表在一份国际期刊上，该论文报告了过去几年的研究结果，详情如下。Aangi，Manalo，Takahashi，Veeravinantanakul，Elburg，2022。矿物学和岩石学贡献177,115。

The research has continued according to plan during financial year 2022.New samples of volcanic rocks hosting the Kuroko ore have been collected during various short trips to the field in the Hokuroku area, around Oodate, Akita-ken. New analyses have been completed, some at Akita University, and others have been made in external laboratories.These analyses included chemical analyses of volcanic rocks, collected from the field, and ore samples, deriving from the collection of Akita University. Chemical analyses allow to understand the abundance of metals (including Zn, Pb, Cu and others) in the analysed samples. Mineral analyses of the main minerals have been completed with th instruments available at Akita University. In addition, mineral identification analyses have been completed as part of student projects. A compilation of the results available so far is currently being made. The new results will be be compared with previously published analyses.A paper on the geology of the Kuroko ore of the Hokuroku area, which reports the results of the study in the last few years, has been published recently in a international journal, as detailed below.Agangi, Manalo, Takahashi, Veeravinantanakul, Elburg, 2022. Contributions to Mineralogy and Petrology 177, 115.