Výsledky vyhledávání - "Michael F. Roden"

40Ar-39Ar dating and petrology of monzonite ejecta in tephra from Quaternary Gölcük volcano (Isparta, SW Turkey): tear-related contrasting metasomatic symptoms in extensional mantle-derived magmas

Autor: Winfried H. Schwarz, Gültekin Topuz, Michael F. Roden, Hakan Çoban, Nguyen Van Hoang

Publikováno v: Lithos. :160-176

Eruption of (74-26 ka old) pyroclastic (pumice fall) flow deposits of the Quaternary Golcuk volcano, Isparta, SW Turkey, carried a cargo of Western Anatolian’s youngest monzonitic-syenitic ejecta, 40Ar-39Ar hornblende ages range 313+64−268+43 ka,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49b046ab7bac238e6f511fa171e2fbaf
https://doi.org/10.1016/j.lithos.2019.02.006

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Petrology of the shoshonitic Çambaşı pluton in NE Turkey and implications for the closure of the Neo-Tethys Ocean: Insights from geochemistry, geochronology and Sr–Nd isotopes

Autor: Michael F. Roden, Şenel Özdamar, Mehmet Z. Billor

Publikováno v: Lithos. :477-492

The Eastern Pontide Orogenic Belt (EPOB) is one of the well-preserved continental magmatic arcs in the Alpine–Himalayan Belt and consists of Paleozoic to Miocene plutonic bodies. This paper presents new geological, bulk-rock major and trace element

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::09965ce2e173f3e813029f39c8ade835
https://doi.org/10.1016/j.lithos.2017.04.025

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Petrogenesis of oligocene plutonic rocks in western Anatolia (NW Turkey): Insights from mineral and rock chemistry, Sr-Nd isotopes, and U-Pb, Ar-Ar and (U-Th)/He geochronology

Autor: Haibo Zou, Willis E. Hames, István Dunkl, Mehmet Z. Billor, Şenel Özdamar, Michael F. Roden, Stoyan Georgiev

Publikováno v: Geochemistry. 81:125747

Northwestern Anatolia is characterized by voluminous Paleozoic to Cenozoic granitoid bodies with varying compositions. Most of them are composite plutons emplaced into western Anatolia orogenic crust during the Eocene, Oligocene and Miocene along the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc8f57eaf0c7c4e7b37fda01fc6c23e9
https://doi.org/10.1016/j.chemer.2021.125747

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Petrogenesis of coeval sodic and potassic alkaline magmas at Spanish Peaks, Colorado: Magmatism related to the opening of the Rio Grande rift

Autor: Michael F. Roden, Heath McGregor, Rory Leahy, A. Brooke Hamil Lord, Vincent J. M. Salters, Adam R. Sarafian

Publikováno v: Geochimica et Cosmochimica Acta. 185:453-476

Approximately coeval, relatively primitive (∼5–10% MgO with exception of a trachyandesite) alkaline mafic dikes and sills at or near Spanish Peaks, CO are divided into relatively sodic and potassic varieties on the basis of K 2 O/Na 2 O. Many of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f06a56f9922cafe10d25d32a87dbaa0
https://doi.org/10.1016/j.gca.2016.04.019

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First U–Pb SHRIMP zircon and 40Ar/39Ar ages of metarhyolites from the Afyon–Bolkardag Zone, SW Turkey: Implications for the rifting and closure of the Neo-Tethys

Autor: Michael F. Roden, Mehmet Z. Billor, Gürsel Sunal, Fahri Esenli, Şenel Özdamar

Publikováno v: Gondwana Research. 24:377-391

The Afyon–Bolkardag Zone (ABZ) is one of the most important metamorphic zones in Turkey. This zone consists of metasedimentary and metavolcanic rocks, which have undergone regional greenschist facies metamorphism. The metavolcanic rocks are dominat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d536ef86520c06793f2912d33c6f2acf
https://doi.org/10.1016/j.gr.2012.10.006

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The volatile content of Vesta: Clues from apatite in eucrites

Autor: Michael F. Roden, Adam R. Sarafian, Alberto Patino-Douce

Publikováno v: Meteoritics & Planetary Science. 48:2135-2154

Apatite was analyzed by electron microprobe in 3 cumulate and 10 basaltic eucrites. Eucritic apatite is fluorine-rich with minor chlorine and hydroxyl (calculated by difference). We confirmed the hydroxyl content by measuring hydroxyl directly in apa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30323ecc74e030982aa28cc2b491ccc5
https://doi.org/10.1111/maps.12124

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Compositional variability of terrestrial mantle apatites, thermodynamic modeling of apatite volatile contents, and the halogen and water budgets of planetary mantles

Autor: Gene Yogodzinski, Jeff Chaumba, Chris Fleisher, Alberto E. Patiño Douce, Michael F. Roden

Publikováno v: Chemical Geology. 288:14-31

Apatites in ultramafic xenoliths from Hawaii, Kamchatka, Nunivak Island, Lunar Crater volcanic field and the Navajo volcanic field have variable volatile (F, Cl, OH) compositions that correlate with their petrogenesis. Apatites in metasomatized lherz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3577db1cc62cb6783b2847490f1a11f9
https://doi.org/10.1016/j.chemgeo.2011.05.018

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