Zobrazeno 1 - 10
of 141
pro vyhledávání: '"John M, Hanchar"'
Autor:
Dorota K. Pietruszka, John M. Hanchar, Fernando Tornos, Richard Wirth, Nathan A. Graham, Kenneth P. Severin, Francisco Velasco, Matthew Steele-MacInnis, Wyatt M. Bain
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-11 (2023)
Abstract The origin of magnetite-(apatite) iron deposits (MtAp) is one of the most contentious issues in ore geology with competing models that range from hydrothermal to magmatic processes. Here we report melt inclusions trapped in plagioclase pheno
Externí odkaz:
https://doaj.org/article/35d75695ac83483a953e139e8285a52d
Autor:
Tobias Keller, Fernando Tornos, John M. Hanchar, Dorota K. Pietruszka, Arianna Soldati, Donald B. Dingwell, Jenny Suckale
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-14 (2022)
Can volcanoes erupt ore deposits? This study combines observations, experiments, and simulations to show that iron ore deposits on El Laco volcano formed by eruption of melt sourced from separation of Fe-rich melt from a silicate magma body beneath.
Externí odkaz:
https://doaj.org/article/74a48b924b834e22b1d13dda0cc93c19
Publikováno v:
Economic Geology. 118:883-902
The A.M. breccia is part of the Giant Copper porphyry deposit in southern British Columbia. It is the only well-defined zoned tourmaline breccia pipe in the Canadian Cordillera. Tourmaline is a common alteration mineral within the A.M. breccia and is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c44b44d61b15fe779f6acc08724d705
https://doi.org/10.5382/econgeo.4987
https://doi.org/10.5382/econgeo.4987
Autor:
Tenley J. Banik, Tamara L. Carley, Matthew A. Coble, John M. Hanchar, Justin P. Dodd, Gabriele M. Casale, Sean P. McGuire
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 3, Pp n/a-n/a (2021)
Abstract We present the first zircon‐based U‐Pb geochronology, trace element concentrations, and O and Hf isotope compositions for Snæfell, an off‐rift volcano in eastern Iceland. These data provide constraints on the longevity and petrogeneti
Externí odkaz:
https://doaj.org/article/918efa31848b4787845ac4770ccc96e4
Autor:
Ke Su, Shao-Bing Zhang, John M. Hanchar, Zhen-Xin Li, Fang-Yuan Sun, Ting Liang, Xiao-Ying Gao
Publikováno v:
Acta Geochimica.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e254b0d35c5e7217771f95544f58d329
https://doi.org/10.1007/s11631-023-00606-w
https://doi.org/10.1007/s11631-023-00606-w
Autor:
Dorota K. Pietruszka, John M. Hanchar, Fernando Tornos, Martin J. Whitehouse, Francisco Velasco
Publikováno v:
GSA Bulletin.
The long-standing controversy about the origin of magnetite-(apatite) mineral deposits pertains to how they form. The Pleistocene El Laco deposit in northern Chile is a critical location because the host andesite contains immiscible melt inclusions t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6ff7744f070dcec9d1c7a08f24bada8
https://doi.org/10.1130/b36506.1
https://doi.org/10.1130/b36506.1
Autor:
Laura Mateo, Fernando Tornos, John M. Hanchar, Igor M. Villa, Holly J. Stein, Antonio Delgado
The Montecristo district, northern Chile, is one of the few places worldwide where there is a direct relationship between magnetite-(apatite) (MtAp) mineralization and iron oxide-copper–gold (IOCG) mineralization. The MtAp mineralization includes T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbd96807a31e163513d43da5e320401f
https://hdl.handle.net/10481/81592
https://hdl.handle.net/10481/81592
Autor:
Dorota K. Pietruszka, John M. Hanchar, Fernando Tornos, Richard Wirth, Nathan A. Graham, Kenneth P. Severin, Francisco Velasco, Matthew Steele-MacInnis, Wyatt M. Bain
The origin of magnetite-(apatite) iron deposits (MtAp) is among the most contentious issue in ore geology with competing models involving purely hydrothermal to magmatic processes. We study here melt inclusions trapped in plagioclase phenocrysts in a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d5233af6fd2b9d1e759bfd0a6f5d7c4
https://doi.org/10.21203/rs.3.rs-2156064/v1
https://doi.org/10.21203/rs.3.rs-2156064/v1
Autor:
Dorota Pietruszka, Emily C. Creaser, Fernando Tornos, John M. Hanchar, Matthew Steele-MacInnis, Wyatt M. Bain
Publikováno v:
Geology. 49:1044-1048
The origins of Kiruna-type magnetite(-apatite) [Mt(-Ap)] deposits are contentious, with existing models ranging from purely hydrothermal to orthomagmatic end members. Here, we evaluate the compositions of fluids that formed the classic yet enigmatic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38f59c3551d8d16ea8b517a0d1e7995b
https://doi.org/10.1130/g48861.1
https://doi.org/10.1130/g48861.1
Publikováno v:
Geochimica et Cosmochimica Acta. 274:45-62
Laser depth profiling of laboratory-induced helium diffusion profiles in natural zircon confirms that helium diffusivity is crystallographically controlled and significantly anisotropic. Experiments on Mud Tank zircon with low degrees of alpha radiat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94f8c577b7e42d4af85a4351f2329dee
https://doi.org/10.1016/j.gca.2020.01.049
https://doi.org/10.1016/j.gca.2020.01.049