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Effect of size-biased sampling on resource predictions from the three-part method for quantitative mineral resource assessment—A case study of the gold mines in the Timmins-Kirkland Lake area of the Abitibi greenstone belt, Canada: 科技报告
报告编号: 70200660, 页数: 24, 2019
作者:  Ellefsen, Karl J. ellefsen@usgs.gov
Adobe PDF(938Kb)  |  收藏  |  浏览/下载:8/6  |  提交时间:2019/11/06
Titanium mineral resources in heavy-mineral sands in the Atlantic coastal plain of the southeastern United States 科技报告
报告编号: 70196106, , 2018
作者:  Van Gosen, Bradley S. bvangose@usgs.gov;  Ellefsen, Karl J. ellefsen@usgs.gov
Adobe PDF(19948Kb)  |  收藏  |  浏览/下载:5/2  |  提交时间:2019/11/06
User’s guide for GcClust—An R package for clustering of regional geochemical data 科技报告
报告编号: 70169018, , 2016
作者:  Ellefsen, Karl J. ellefsen@usgs.gov;  Smith, David B. dsmith@usgs.gov
Adobe PDF(2913Kb)  |  收藏  |  浏览/下载:2/0  |  提交时间:2019/11/06