Zobrazeno 1 - 10 of 26 pro vyhledávání: '"M. J. Spicuzza"'
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SIMS microanalysis of the Strelley Pool Formation cherts and the implications for the secular-temporal oxygen-isotope trend of cherts
Autor: John W. Valley, Reinhard Kozdon, Arthur H. Hickman, M. J. Spicuzza, Ian J. Orland, Aaron J. Cavosie, M. J. Van Kranendonk, J.N. Cammack, Kouki Kitajima
Publikováno v: Precambrian Research. 304:125-139
The significance of oxygen isotope ratios in Archean chert has long been debated. Cherts from the c. 3.4 Ga Strelley Pool Formation (SPF) (Pilbara Craton, Western Australia) host some of the oldest stromatolite and microfossil evidence for life, but
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6d1cb437b76d90f99fbc8d5516ffd4a4
https://doi.org/10.1016/j.precamres.2017.11.005
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8
Oxygen isotope thermometry using quartz inclusions in garnet
Autor: M. J. Spicuzza, Daisuke Nakashima, Ryan Joel Quinn, John W. Valley, Kouki Kitajima
Publikováno v: Journal of Metamorphic Geology. 35:231-252
Oxygen isotope ratios of quartz inclusions within garnet from granulite and amphibolite facies gneisses in the Adirondack Mountains, NY were analyzed and used to determine metamorphic temperatures. Primary quartz inclusions for eight of 12 samples ha
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3c3539203988bc5169d5d40626a16d54
https://doi.org/10.1111/jmg.12230
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9
Temporal and compositional evolution of Jorullo volcano, Mexico: Implications for magmatic processes associated with a monogenetic eruption
Autor: Elisabeth Widom, Claus Siebe, Sergio Salinas, Marie-Noëlle Guilbaud, G. Valdez, John W. Valley, Christine Rasoazanamparany, M. J. Spicuzza
Publikováno v: Chemical Geology. 434:62-80
The 1759–1774 eruption of the Jorullo volcano in the Michoacan Guanajuato Volcanic Field (MGVF), Mexico, produced lavas that range in composition from basalt to basaltic andesite. We have conducted new major and trace element and isotopic studies (
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2809338c7338c577909b4030411a4c5d
https://doi.org/10.1016/j.chemgeo.2016.04.004
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10
Carbon and sulfur isotopic signatures of ancient life and environment at the microbial scale: Neoarchean shales and carbonates
Autor: Takayuki Ushikubo, Reinhard Kozdon, J. L. Eigenbrode, M. J. Spicuzza, Kevin Lepot, Kouki Kitajima, Christian Hallmann, Kenneth H. Williford, Roger E. Summons, John W. Valley
Publikováno v: Geobiology
An approach to coordinated, spatially resolved, in situ carbon isotope analysis of organic matter and carbonate minerals, and sulfur three- and four-isotope analysis of pyrite with an unprecedented combination of spatial resolution, precision, and ac
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e45a17495ddf75cb4ac6de376f660d84
https://doi.org/10.1111/gbi.12163
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