Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Theodore J. Bornhorst"'
Publikováno v:
Minerals, Vol 13, Iss 7, p 927 (2023)
The Western Syncline hosts reduced-facies, or Kupferschiefer-type, sedimentary rock-hosted stratiform Cu deposits (SSC) in the lowermost meters of the Nonesuch Formation, which is part of a thick section of clastic sedimentary rocks that comprise the
Externí odkaz:
https://doaj.org/article/faea0235cacb4250b3d7e8342c6cb95b
Publikováno v:
Minerals, Vol 12, Iss 4, p 474 (2022)
The Mesoproterozoic North American Midcontinent Rift hosts the world’s largest accumulation of native copper in Michigan’s Keweenaw Peninsula. During a regional metamorphogenic-hydrothermal event, native copper was deposited along with spatially
Externí odkaz:
https://doaj.org/article/6fc6fc0bc1894fd9b7a83ab34aded0c5
Autor:
Theodore J. Bornhorst, Ryan Mathur
Publikováno v:
Minerals, Vol 8, Iss 11, p 508 (2018)
We appreciate the opportunity to respond to Brown’s [...]
Externí odkaz:
https://doaj.org/article/372a1e404dc64489acea2e27100a165b
Autor:
Theodore J. Bornhorst
Publikováno v:
Minerals, Vol 8, Iss 6, p 251 (2018)
The Special Issue of Minerals on Geochemistry and Mineralogy of Hydrothermal Metallic Mineral Deposits presents the results of diverse geochemical and mineralogical research from across the globe[…]
Externí odkaz:
https://doaj.org/article/ce80f6cac3084cf0bbc7af607054f4d9
Autor:
Theodore J. Bornhorst, Ryan Mathur
Publikováno v:
Minerals, Vol 7, Iss 10, p 185 (2017)
The Keweenaw Peninsula native copper district of Michigan, USA is the largest concentration of native copper in the world. The copper isotopic composition of native copper was measured from stratabound and vein deposits, hosted by multiple rift-filli
Externí odkaz:
https://doaj.org/article/907951cff3c848db81bc5421f65f23a3
Publikováno v:
Economic Geology. 111:783-794
Native copper grains are found in aphyric amygdaloidal basalt of early Miocene age (ca. 20 Ma) in the southern Mineoka belt of Boso Peninsula, central Japan. The native copper was precipitated in the amygdules or veins along with calcite and analcime
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b0634a4517319aa421042d2905d247a
https://doi.org/10.2113/econgeo.111.3.783
https://doi.org/10.2113/econgeo.111.3.783
Autor:
Theodore J. Bornhorst, Mark J. Logsdon
Publikováno v:
Economic Geology. 111:527-542
Modern mine development requires consideration of environmental management, including long-term, post-closure conditions. A pile of ore from test mining of the Copperwood deposit in 1957 subsequently weathered under ambient local conditions for 52 ye
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5db897c4733cf5ca1db2d83f07346d5a
https://doi.org/10.2113/econgeo.111.2.527
https://doi.org/10.2113/econgeo.111.2.527
Publikováno v:
Rocks & Minerals. 90:450-453
The A. E. Seaman Mineral Museum of Michigan Technological University and the College of Literature, Science, and the Arts' Department of Earth and Environmental Sciences at the University of Michig...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13d6cce284c6112e84fc9046abded40d
https://doi.org/10.1080/00357529.2015.1059093
https://doi.org/10.1080/00357529.2015.1059093
Publikováno v:
Nature. 546(7657)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::7e7acf27caeeb7f6f0d332568fad2bed
https://pubmed.ncbi.nlm.nih.gov/28406223
https://pubmed.ncbi.nlm.nih.gov/28406223
Autor:
Theodore J. Bornhorst
Publikováno v:
Geosphere. 14:1380-1381
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d9ee98fc3ec68ae7a2502f3cc31dac1
https://doi.org/10.1130/ges01575.1
https://doi.org/10.1130/ges01575.1