What lies beneath the ice? Using the geochemistry and geochronology of modern river cobbles to better decipher the evolution of a glaciated volcanic arc (Wrangell Arc, Alaska, U.S.A.)

Autor: Matthew Brueseke, Beth K. Morter, Jeffrey A Benowitz, Jeffrey Trop, Stanley A Mertzman, Carl S Kirby, Kailyn Davis

Publikováno v: Volcanica, Vol 6, Iss 2, Pp 313-329 (2023)

The ~30 Ma to Recent Wrangell Arc (WA), Alaska is an ideal location to study subduction and slab-edge magmatism. However, the WA covers a huge area (~15,000 km2) and ~29% of the WA is covered by glaciers with rugged topography, making bedrock samplin

Externí odkaz: https://doaj.org/article/d1262e903a9740efa3b5d912efc99333

A Fractional Crystallization Link between Komatiites, Basalts, and Dunites of the Palaeoproterozoic Winnipegosis Komatiite Belt, Manitoba, Canada

Autor: Pedro Waterton, Bruce A. Kjarsgaard, K. R. Mertzman, D. Graham Pearson, Stanley A. Mertzman

Publikováno v: Waterton, P, Pearson, D G, Mertzman, S A, Mertzman, K R & Kjarsgaard, B 2020, ' A fractional crystallisation link between komatiites, basalts, and dunites of the Palaeoproterozoic Winnipegosis Komatiite Belt, Manitoba, Canada ', Journal of Petrology, vol. 61, no. 5 . https://doi.org/10.1093/petrology/egaa052

The rock type most commonly associated with komatiite throughout Earth’s history is tholeiitic basalt. Despite this well-known association, the link between komatiite and basalt formation is still debated. Two models have been suggested: that thole

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ddc6eb2c1547938510bf2fa921ac897
https://doi.org/10.1093/petrology/egaa052

Mars analog minerals’ spectral reflectance characteristics under Martian surface conditions

Autor: Edward A. Cloutis, J. T. Poitras, Paul Mann, Mark R. Salvatore, Daniel M. Applin, Stanley A. Mertzman

Publikováno v: Icarus. 306:50-73

We investigated the spectral reflectance properties of minerals under a simulated Martian environment. Twenty-eight different hydrated or hydroxylated phases of carbonates, sulfates, and silica minerals were selected based on past detection on Mars t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d9626031c6ac0cc8c13efa4572dca7b9
https://doi.org/10.1016/j.icarus.2018.01.023

Geochemistry of Woranso–Mille Pliocene basalts from west-central Afar, Ethiopia: Implications for mantle source characteristics and rift evolution

Autor: Alan L. Deino, Mulugeta Alene, Stanley A. Mertzman, Yohannes Haile-Selassie, William K. Hart, Luis Gibert, Beverly Z. Saylor

Publikováno v: Lithos. :187-200

The Woranso–Mille (WORMIL) area in the west-central Afar, Ethiopia, contains several Pliocene basalt flows, tuffs, and fossiliferous volcaniclastic beds. We present whole-rock major- and trace-element data including REE, and Sr–Nd–Pb isotope ra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d2818742f8e41b6f9b840a627c4e278
https://doi.org/10.1016/j.lithos.2017.03.005

Age and context of mid-Pliocene hominin cranium from Woranso-Mille, Ethiopia

Autor: Yohannes Haile-Selassie, Doris Barboni, Benjamin Bourel, Stanley A. Mertzman, Mulugeta Alene, Florence Sylvestre, Alice Novello, Alan L. Deino, Luis Gibert, Beverly Z. Saylor, Naomi E. Levin, Sarah J. Feakins, Mark D. Peaple, Stephanie M. Melillo

Publikováno v: Nature
Nature, Nature Publishing Group, 2019, 573 (7773), pp.220-224. ⟨10.1038/s41586-019-1514-7⟩
Nature, 2019, 573 (7773), pp.220-224. ⟨10.1038/s41586-019-1514-7⟩

International audience; A fossil hominin cranium was discovered in mid-Pliocene deltaic strata in the Godaya Valley of the northwestern Woranso-Mille study area in Ethiopia. Here we show that analyses of chemically correlated volcanic layers and the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e9df1f7f666121cbbec86f59edbc745
https://hal.archives-ouvertes.fr/hal-02286089