Results 51 to 60 of about 148,632 (254)

Expanding the application of the Eu-oxybarometer to the lherzolitic shergottites and nakhlites: Implications for the oxidation state heterogeneity of the Martian interior [PDF]

, 2009
Experimentally rehomogenized melt inclusions from the nakhlite Miller Range 03346 (MIL 03346) and the lherzolitic shergottite Allan Hills 77005 (ALH 77005) have been analyzed for their rare earth element (REE) concentrations in order to characterize the ...
Elkins-Tanton, Linda, McCanta, Molly C., Rutherford, Malcolm J.   +2 more
core   +1 more source

ALL-RUSSIA CONFERENCE «FLUID REGIME OF ENDOGENIC PROCESSES IN THE CONTINENTAL LITHOSPHERE», IRKUTSK, RUSSIA, OCTOBER 6–9, 2015

Геодинамика и тектонофизика, 2015
Chronicle of All-Russian conference “Fluid regime of endogenic processes of continental lithosphere” devoted to 50 anniversary of Laboratory of petrology, geochemistry and ore genesis of the Institute of the Earth’s crust is presented.
F. A. Letnikov, Yu. V. Danilova, T. S. Sokolova, A. V. Levin   +3 more
doaj   +1 more source

Mesozoic-Cenozoic mafic magmatism in Sanandaj-Sirjan Zone, Zagros Orogen (Western Iran): geochemical and isotopic inferences from Middle Jurassic and Late Eocene gabbros [PDF]

, 2017
One of the consequences of Neo-Tethys ocean subduction beneath the Central Iranian Micro-continent (CIMC) is the development of rare gabbroic intrusions in the Malayer-Boroujerd Plutonic Complex (MBPC) located in the Sanandaj-Sirjan Zone (SaSZ) of the ...
Deevsalar, Reza, Ghaderi, Majid, Hoskin, P.W.O., Lee, Hao Yang, Murata, Mamoru, Neill, Iain, Oshiro, Shoma, Shinjo, Ryuichi, Wang, Kuo-Lung   +8 more
core   +1 more source

Petrology, Palynology, and Geochemistry of Gray Hawk Coal (Early Pennsylvanian, Langsettian) in Eastern Kentucky, USA

, 2015
This study presents recently collected data examining the organic petrology, palynology, mineralogy and geochemistry of the Gray Hawk coal bed. From the Early Pennsylvanian, Langsettian substage, Gray Hawk coal has been mined near the western edge of the
J. Hower, C. Eble, J. O'Keefe, S. Dai, Peipei Wang, Panpan Xie, Jingjing Liu, C. Ward, D. French   +8 more
semanticscholar   +1 more source

Zircon ages in granulite facies rocks: decoupling from geochemistry above 850 °C? [PDF]

, 2018
Granulite facies rocks frequently show a large spread in their zircon ages, the interpretation of which raises questions: Has the isotopic system been disturbed? By what process(es) and conditions did the alteration occur?
A Boriani, A Boriani, A Henk, A Langone, A Mulch, A Mulch, A Möller, A Zanetti, A Zingg, A Zingg, A-M Seydoux-Guillaume, AE Hofmann, B Bingen, B Schnetger, Barbara E. Kunz, BE Kunz, BE Kunz, C Annen, C Paton, C Paton, C Redler, C Redler, C Yakymchuk, CR McFarlane, CR McFarlane, D Regis, D Rubatto, D Rubatto, D Rubatto, D Rubatto, D Rubatto, Daniele Regis, DE Kelsey, DE Kelsey, DJ Cherniak, DJ Cherniak, DM Fountain, DM Fountain, E Rutter, EB Watson, EB Watson, EM Peterman, F Corfu, F Tomaschek, FJ Korhonen, G Bigi, G Fraser, G Peressini, G Rivalenti, G Rivalenti, G Vavra, G Vavra, GL Luvizotto, H Berckhemer, H Degeling, H Voshage, IS Williams, IS Williams, J Hermann, J Pape, J Sláma, JA Baldwin, JA Petrus, JE Quick, JE Quick, JF Diener, JW Valley, K Mezger, KR Mehnert, L Nasdala, L Nasdala, L Schiøtte, M Bertolani, M Bertolani, M Guillong, M Kohn, M Tichomirowa, MA Kusiak, MA Kusiak, Martin Engi, MJ Whitehouse, MP Roberts, MR Handy, MR Handy, NE Timms, NE Timms, NJ Pearce, NM Kelly, P Monjoie, P Vonlanthen, PW Hoskin, PW Hoskin, PW Hoskin, R Schuster, RC Ewing, RJ Taylor, RM Flowers, RT Pidgeon, S Barboza, S Barboza, S Bodorkos, S Capedri, S Piazolo, S Sinigoi, S Sinigoi, S Sinigoi, SE Jackson, SH Vorhies, SL Harley, SM Reddy, SM Schmid, SM Schmid, T Geisler, T Geisler, TA Ewing, U Schaltegger, U Schaltegger, U Schaltegger, U Schaltegger, US Klötzli, WF McDonough   +120 more
core   +1 more source

Preliminary results on degree of thermal alteration recorded in the eastern part of Mt. Papuk, Slavonia, Croatia

Geologia Croatica, 2011
In order to improve present knowledge of metamorphic conditions to which rocks of the Mt. Papuk have been subjected, selected samples belonging to the Radlovac metamorphic complex as well as overlying sedimentary rocks and parts of Psunj metamorphic ...
Vanja Biševac, Dražen Balen, Darko Tibljaš, Darko Španić   +3 more
doaj   +1 more source

Rapid Magma Generation or Shared Magmatic Reservoir? Petrology and Geochronology of the Rat Creek and Nelson Mountain Tuffs, CO, USA

Frontiers in Earth Science, 2019
Large-volume silicic volcanism poses global hazards in the form of proximal pyroclastic density currents, distal ash fall and short-term climate perturbations, which altogether warrant the study of how silicic magma bodies evolve and assemble.
Jakub Sliwinski, David Farsky, Peter W. Lipman, Marcel Guillong, Olivier Bachmann   +4 more
doaj   +1 more source

AgeSpectraAnalyst: A MATLAB based package to model zircon age distributions in silicic magmatic systems

MethodsX, 2023
In the last decade, improvements in the analytical precision achievable by zircon U-Pb geochronological techniques have allowed to resolve complexities of zircon crystallization histories in magmatic rocks to an unprecedented level.
Lorenzo Tavazzani, Jörn-Frederik Wotzlaw, Rita Economos, Dawid Szymanowski, Oscar Laurent, Olivier Bachmann, Cyril Chelle-Michou   +6 more
doaj   +1 more source

Geology and geochemistry of the Eocene zeolite bearing volcaniclastic sediments of Metaxades, Thrace, Greece

Estudios Geologicos, 1995
Los sedimentos eocenos volcanoclásticos con zeolita (51% de media de clinoptilolita rica en Ca) de Metaxades, Tracia, Grecia, se estudian desde el punto de vista geológico y de su composición química. Las formaciones alternantes que se pueden observar en
Th. Koutles, A. Kassoli-Fournaraki, A. Filippidis, A. Tsirambides   +3 more
doaj   +1 more source

An ion probe study of the sulphur isotopic composition of Fe-Ni sulphides in CM carbonaceous chondrites [PDF]

, 2004
From the Introduction: The CM chondrites have endured variable degrees of aqueous alteration [1] which has changed their original mineralogy. A detailed study of the petrology and mineralogy of the sulphides in a suite of increasingly aqueously altered ...
Bullock, E. S., Gounelle, M., Grady, M. M., McKeegan, K. D., Russell, S. S.   +4 more
core   +1 more source