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Zuxing Chen, Landry Soh Tamehe, Haiyan Qi, Yuxiang Zhang, Zhigang Zeng and Mingjiang Cai
The Yonaguni Knoll IV is an active seafloor hydrothermal system associated with submarine silicic volcanism located in the ?cross back-arc volcanic trail? (CBVT) in the southwestern Okinawa Trough. However, the behavior of volatiles during magmatic diffe...
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Nikolai Berdnikov, Pavel Kepezhinskas, Natalia Konovalova and Nikita Kepezhinskas
Gold is typically transported by mafic and evolved magmas into the upper crust to be deposited in shallow oxidized porphyry and epithermal environments. However, the magmatic behavior of gold is still poorly understood and warrants further attention. Add...
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Mattia Bonazzi, Antonio Langone, Simone Tumiati, Edoardo Dellarole, Maurizio Mazzucchelli, Tommaso Giovanardi and Alberto Zanetti
Corundum-rich (up to 55 vol.%) felsic dykes formed with albite, ±K-feldspar, ±hercynite and ±biotite-siderophyllite cut the lower crustal rocks exposed in the Ivrea?Verbano Zone (NW Italy). Zircon is an abundant accessory mineral and its investigation th...
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Zoltán Váci and Carl Agee
Martian meteorites provide the only direct constraints on the timing of Martian accretion, core formation, magmatic differentiation, and ongoing volcanism. While many radiogenic isotope chronometers have been applied to a wide variety of Martian samples,...
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Jeffrey R. Chiarenzelli, Marian V. Lupulescu, Sean P. Regan and Jared W. Singer
At the Cheever Mine, located in the eastern Adirondack Mountains of the Mesoproterozoic Grenville Province, iron oxide-apatite ore forms a narrow (<3 m) sheet cross-cutting metasomatically altered, magnetite-bearing, albite-rich leucogranitic host roc...
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Ewa Slaby, Hans-Jürgen Förster, Richard Wirth, Alicja Wudarska, Lukasz Birski and Izabela Moszumanska
Phosphates from the Martian shergottite NWA 2975 were used to obtain insights into the source and subsequence differentiation of the melt/melts. The crystallization of two generations of fluorapatite (F > Cl~OH and F-rich), chlorapatite and ferromerrilli...
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Felipe Espinoza,Diego Morata,Mireille Polve,Yves Lagabrielle,Rene Maury,Aude de la Rupelle,Christele Guivel,Joseph Cotten,Herve Bellon,Manuel Suarez
Pág. 300 - 328
We presenta chronological (K-Ar), petrologic and geochemical study (major and trace elements, SrNd isotopes) ofMiddle Miocene (ca. 16-14 Ma) calc-alkaline rocks (basalts to andesites) extruded in the present-day back-arc region ofCentral Patagonia (Zebal...
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Daniel Sellés,A. Carolina Rodriguez,Michael A. Dungan,Jose A. Naranjo,Moyra Gardeweg
Pág. 293 - 316
The Quaternary Nevado de Longaví volcano of the Andean Southern Volcanic Zone (SVZ) has erupted magmas that range in composition from basalt to low-silica dacite, although andesites are the dominant erupted magma type. Amphibole is a common phenocryst ph...
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Paulina Gana,Richard M. Tosdal
Pág. 151 - 164
RESUMEN. La geocronologia U-Pb y K-Ar aplicada a rocas intrusivas del batolito de la Costa de Chile Central, permitio comprobar una edad de cristalizacion de 299+/-10 Ma (U-Pb en circon) para el pluton Pomaire de la Unidad Mirasol. Ella esta expuesta al ...
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Daniel Tormey,Paulina Schuller,Leopoldo Lopez-Escobar,Frederick Frey
Pág. 165 - 175
This is a two part study of recent lavas Irom the Southern Volcanic Zone (SVZ) of the Andes (33-46°S). In the first part, radioactive equilibrium between 238U and 230Th was tested by analyzing 9 samples from historic eruptions for 230Th/232Th activity ra...
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