CCPortal

浏览/检索结果: 共31条,第1-10条 帮助

限定条件    
已选(0)清除 条数/页:   排序方式:
New GSA Bulletin articles published ahead of print in June 科技资讯
2021
收藏  |  浏览/下载:16/0  |  提交时间:2021/07/02
No need to dig deep: New tool maximizes extraction of gold and porphyry copper 科技资讯
2020
收藏  |  浏览/下载:8/0  |  提交时间:2020/01/19
Assessment of undiscovered copper resources of the world, 2015 科技报告
报告编号: 70201026, 页数: 644, 2019
作者:  Hammarstrom, Jane M. jhammars@usgs.gov;  Zientek, Michael L.;  Parks, Heather L. hparks@usgs.gov;  Dicken, Connie L. cdicken@usgs.gov;  U.S. Geological Survey Global Copper Mineral Resource Assessment Team
Adobe PDF(324154Kb)  |  收藏  |  浏览/下载:103/29  |  提交时间:2019/11/06
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
Focus areas for data acquisition for potential domestic sources of critical minerals—Rare earth elements 科技报告
报告编号: 70202572, 页数: 21, 2019
作者:  Hammarstrom, Jane M. jhammars@usgs.gov;  Dicken, Connie L. cdicken@usgs.gov
Adobe PDF(1665Kb)  |  收藏  |  浏览/下载:44/24  |  提交时间:2019/11/06
Soil mineralogy and geochemistry along a north-south transect in Alaska and the relation to source-rock terrane 科技报告
报告编号: 70204649, 页数: 27, 2019
作者:  Wang, Bronwen;  Hults, Chad P. chults@usgs.gov;  Eberl, Dennis D.;  Woodruff, Laurel G. woodruff@usgs.gov;  Cannon, William F. wcannon@usgs.gov;  Gough, Larry P. lgough@usgs.gov
Adobe PDF(6985Kb)  |  收藏  |  浏览/下载:65/35  |  提交时间:2019/11/06
Descriptive models for epithermal gold-silver deposits: Chapter Q in 科技报告
报告编号: 70196376, , 2018
作者:  John, David A. djohn@usgs.gov;  Vikre, Peter G. pvikre@usgs.gov;  du Bray, Edward A. edubray@usgs.gov;  Blakely, Richard J. blakely@usgs.gov;  Fey, David L. dfey@usgs.gov;  Rockwell, Barnaby W. barnabyr@usgs.gov;  Mauk, Jeffrey L. jmauk@usgs.gov;  Anderson, Eric D. ericanderson@usgs.gov;  Graybeal, Frederick T.
Adobe PDF(39815Kb)  |  收藏  |  浏览/下载:51/17  |  提交时间:2019/11/06
Quartz-pebble-conglomerate gold deposits: Chapter P in Mineral deposit models for resource assessment 科技报告
报告编号: 70196218, 页数: 44, 2018
作者:  Taylor, Ryan D. rtaylor@usgs.gov;  Anderson, Eric D. ericanderson@usgs.gov
Adobe PDF(6658Kb)  |  收藏  |  浏览/下载:46/16  |  提交时间:2019/11/06
Platinum-group elements 科技报告
报告编号: 70159183, 页数: 106, 2017
作者:  Zientek, Michael L. mzientek@usgs.gov;  Loferski, Patricia J. ploferski@usgs.gov;  Parks, Heather L. hparks@usgs.gov;  Schulte, Ruth F. rschulte@usgs.gov;  Seal, Robert R. II rseal@usgs.gov
Adobe PDF(34317Kb)  |  收藏  |  浏览/下载:89/41  |  提交时间:2019/11/06
Rhenium 科技报告
报告编号: 70158902, 页数: 62, 2017
作者:  John, David A. djohn@usgs.gov;  Seal, Robert R. II rseal@usgs.gov;  Polyak, Désirée E. dpolyak@usgs.gov
Adobe PDF(11230Kb)  |  收藏  |  浏览/下载:9/8  |  提交时间:2019/11/06