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pro vyhledávání: '"Alex C. Brown"'
Autor:
Alex C. Brown
Publikováno v:
Minerals, Vol 8, Iss 11, p 506 (2018)
Well-grouped δ65Cu values (−0.3 to +0.8‰) from120 samples of native copper fromthe Keweenaw native copper district have been attributed [...]
Externí odkaz:
https://doaj.org/article/bc8307a0e56d4fd0b491b58ef408b371
Autor:
Alex C. Brown
Publikováno v:
Minerals, Vol 7, Iss 10, p 192 (2017)
Early diagenetic sediment-hosted stratiform copper (eSSC) mineralization results from low-temperature cuprous chloride complexes carried by saline aqueous solution circulating through footwall aquifers. Favorable copper solubilities are attained in m
Externí odkaz:
https://doaj.org/article/4addbb81c1c1436f91bc5b24ff956011
Autor:
Alex C. Brown
Publikováno v:
Mineralium Deposita. 53:721-728
The curious occurrence of copper-rich early diagenetic sediment-hosted stratiform copper mineralization in the finest-grained facies of Nonesuch greybeds in northern Michigan has been previously attributed to the warming of cupriferous brines in the
Publikováno v:
Energy Procedia. 114:6579-6587
A cradle to gate life cycle assessment model has been developed to quantify the greenhouse gas emission and water consumption footprint of a U.S. unconventional shale gas well. Results show that 7.1 kg CO 2 are emitted per Mcf of gas produced, equal
Autor:
Alex C. Brown
Publikováno v:
Economic Geology. 109:2035-2050
Economic stratiform copper mineralization in the fine-grained, carbonaceous basal Nonesuch Formation of the ~50-km-wide White Pine-Presque Isle mining district, northern Michigan, has long been explained by the essentially vertical infiltration of cu
Autor:
Alex C. Brown
Publikováno v:
Geological Society of America Abstracts with Programs.
Autor:
Alex C. Brown
Publikováno v:
Economic Geology. 104:857-868
Most estimates of the total tonnage of copper metal leached from footwall red beds to form sediment-hosted stratiform copper deposits are based on the amounts of copper at ppm levels that might have been derived from the volume of red beds underlying
Autor:
Alex C. Brown
Publikováno v:
Economic Geology. 103:1691-1694
Economic native copper lodes in the Lake Superior district are confined to a 45-km-long portion of the Portage Lake Volcanics on the Keweenaw Peninsula, despite similar host rocks extending for more than 1,000 km around Lake Superior. The focus of as
Autor:
C. Gustavo Durieux, Alex C. Brown
Publikováno v:
Mineralium Deposita. 42:879-899
The Juramento deposit in northwestern Argentina exhibits several readily visible general characteristics of sediment-hosted stratiform copper (SSC) mineralization. It consists of fine-grained disseminated base-metal sulfides within marine to lacustri
Autor:
Alex C. Brown
Publikováno v:
Journal of Geochemical Exploration. 89:23-26
Copper and uranium may be closely associated metals in sedimentary basins in which “upstream” sediments have been diagenetically reddened (e.g., sediment-hosted stratiform copper (SSC) deposits and roll-type uranium deposits) and the immediate ho