Výsledky vyhledávání - "A. J. Locock"

Incorporating previously neglected excess oxygen associated with ferric iron in matrix corrections of microprobe data from cubic and rhombohedral Fe-Ti oxides

Autor: Michael A. Dungan, John J. Donovan, Andrew J. Locock, Emma S. Bullock

Publikováno v: American Mineralogist: Journal of Earth and Planetary Materials. 108:978-986

Estimates of the oxidation states of magmas are important to current investigations of the geo-chemical characteristics of their source regions and of evolved magmatic series created during differentiation. One means of achieving such estimates is to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::20704e165f5110af7373431b8625ad34
https://doi.org/10.2138/am-2022-8447

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Significant Variability in the Photocatalytic Activity of Natural Titanium-Containing Minerals: Implications for Understanding and Predicting Atmospheric Mineral Dust Photochemistry

Autor: Devon T. McGrath, Michael J. Katz, Maya Abou-Ghanem, Anton O. Oliynyk, Sarah A. Styler, Andrew J. Locock, Laura C Matchett, Zhihao Chen

Publikováno v: Environmental Science & Technology. 54:13509-13516

The billions of tons of mineral dust released into the atmosphere each year provide an important surface for reaction with gas-phase pollutants. These reactions, which are often enhanced in the presence of light, can change both the gas-phase composi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1f9b26f175d415b06670ac5f279a408
https://doi.org/10.1021/acs.est.0c05861

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Heamanite-(Ce), (K0.5Ce0.5)TiO3, a new perovskite supergroup mineral found in diamond from Gahcho Kue, Canada

Autor: Chiara Anzolini, William K. Siva-Jothy, Andrew J. Locock, Fabrizio Nestola, Tonči Balić-Žunić, Matteo Alvaro, Ingrid L. Chinn, Thomas Stachel, D. Graham Pearson

Heamanite-(Ce) (IMA 2020-001), ideally (K0.5Ce0.5)TiO3, is a new perovskite-group mineral found as an inclusion in a diamond from the Gahcho Kué mine in the Northwest Territories, Canada. It occurs as brown, translucent single crystals with an avera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::628b0db914c9cef85569042a232ac33e
http://hdl.handle.net/11577/3454082

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Nixonite, Na2Ti6O13, a new mineral from a metasomatized mantle garnet pyroxenite from the western Rae Craton, Darby kimberlite field, Canada

Autor: Andrew J. Locock, Luca Peruzzo, Fabrizio Nestola, Fei Wang, D. Graham Pearson, Garrett A. Harris, Dongzhou Zhang, Chiara Anzolini, Steven D. Jacobsen

Publikováno v: The American mineralogist 104 (2019): 1336–1344. doi:10.2138/am-2019-7023
info:cnr-pdr/source/autori:Anzolini C.[1], Wang F.[2], Harris G.[1], Locock A.[1], Zhang D.[3], Nestola F.[4], Peruzzo L.[5], Jacobsen S.[2], Pearson D.[1]/titolo:Nixonite, Na2Ti6O13, a new mineral from a metasomatized mantle garnet pyroxenite from the western Rae Craton, Darby kimberlite field, Canada/doi:10.2138%2Fam-2019-7023/rivista:The American mineralogist/anno:2019/pagina_da:1336/pagina_a:1344/intervallo_pagine:1336–1344/volume:104

Nixonite (IMA 2018-133), ideally Na2Ti6O13, is a new mineral found within a heavily metaso-matized pyroxenite xenolith from the Darby kimberlite field, beneath the west-central Rae Craton, Canada. It occurs as microcrystalline aggregates, 15 to 40 mm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7786a844bcd9ef65b1b0465c29f6ed2a
https://doi.org/10.2138/am-2019-7023

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Goldschmidtite, (K,REE,Sr)(Nb,Cr)O3: A new perovskite supergroup mineral found in diamond from Koffiefontein, South Africa

Autor: Andrew J. Locock, James P. S. Walsh, Steven D. Jacobsen, Jeff W. Harris, Michelle D. Wenz, Nicole A. Meyer

Publikováno v: American Mineralogist. 104:1345-1350

Goldschmidtite is a new perovskite-group mineral (IMA No. 2018-034) with the ideal formula (K,REE,Sr)(Nb,Cr)O3. A single grain of goldschmidtite with a maximum dimension of ∼100 μm was found as an inclusion in a diamond from the Koffiefontein pipe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43c0c196e07a8882075f8837e0a01a4b
https://doi.org/10.2138/am-2019-6937

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Production of Atmospheric Organosulfates via Mineral-Mediated Photochemistry

Autor: Andrew J. Locock, Sarah A. Styler, Mario Schmidt, Shawn M. Jansen van Beek, Anton O. Oliynyk, Maya Abou-Ghanem

Publikováno v: ACS Earth and Space Chemistry. 3:424-431

Although organosulfates (ROSO3–) comprise a significant component of secondary organic aerosol (SOA) mass, their atmospheric formation mechanisms are not fully understood. Here, using methacrolein as a model organosulfate precursor, we present a ne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::24e093d6fd09c3235358c6a217c33de6
https://doi.org/10.1021/acsearthspacechem.8b00178

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Identifying and sourcing pyrometamorphic artifacts: Clinker in subarctic North America and the hunter-gatherer response to a Late Holocene volcanic eruption

Autor: Todd J. Kristensen, Thomas D. Andrews, M. John M. Duke, Ruth M. Gotthardt, Glen MacKay, Andrew J. Locock, John W. Ives, Sean C. Lynch

Publikováno v: Journal of Archaeological Science: Reports. 23:773-790

Pyrometamorphic rocks produced by natural coal combustion appear at archaeological sites across North America but have received little archaeological attention regarding provenance studies. Tertiary Hills Clinker is a distinct pyrometamorphic rock fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0d7b22a334fc7e6b0c6b109d88a5c4ba
https://doi.org/10.1016/j.jasrep.2018.11.039

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Elevated Magmatic Sulfur and Chlorine Contents in Ore-Forming Magmas at the Red Chris Porphyry Cu-Au Deposit, Northern British Columbia, Canada

Autor: Chris Rees, Joseph A. Petrus, Jeremy P. Richards, Jing-Jing Zhu, Andrew J. Locock, Robert A. Creaser, Jürgen Lang, S. Andrew DuFrane

Publikováno v: Economic Geology. 113:1047-1075

The Red Chris porphyry Cu-Au deposit is located in the Stikinia island-arc terrane in northwest British Columbia. It is hosted by the Red Stock, which has five phases of porphyry intrusions: P1, P2E, P2I, P2L, and P3. New U-Pb dating of zircon shows

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e275562abbbb646797e1c3954fcb5243
https://doi.org/10.5382/econgeo.2018.4581

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Magmatic evolution and porphyry–epithermal mineralization in the Taftan volcanic complex, southeastern Iran

Autor: Terry L. Spell, Andrew J. Locock, Jeremy P. Richards, Ali Sholeh, Mehraj Aghazadeh, Amir M. Razavi

Publikováno v: Ore Geology Reviews. 95:258-279

The Taftan volcanic complex is located above the Makran subduction zone in Sistan and Baluchestan province, southeastern Iran. The earliest volcanic activity at Taftan started in the late Miocene (∼8 Ma) with eruption of andesitic to dacitic lava o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd90bc0c2cdffe12e64f8236c7d99a39
https://doi.org/10.1016/j.oregeorev.2018.02.018

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