Results 171 to 180 of about 136,558 (327)

Forensic gemmological investigation based on optical and crystal-chemical changes in topaz from Ouro Preto and Caraí, Brazil, induced by heat treatment. [PDF]

Sci Rep
Fridrichová J, Bačík P, Rybnikova O, Štubňa J, Furka D, Furka S, Cempírek J, Škoda R, Vaculovič T.   +8 more
europepmc   +1 more source

Petrology and Geochronology of Metamorphic Zircon

, 2017
M. Kohn, N. Kelly
semanticscholar   +1 more source

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

Journal of Metamorphic Geology, EarlyView.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum, Tereza Nemeškalová, Martin Racek, Vojtěch Janoušek, Julian Portenkirchner, Rainer Abart   +5 more
wiley   +1 more source

Average physical structure of cratonic lithosphere, from thermodynamic inversion of global surface-wave data. [PDF]

Mineral Petrol
Xu Y, Lebedev S, Fullea J.
europepmc   +1 more source

Dataset of the CO₂-rich gas emissions in the Eastern Carpathians, Romania. [PDF]

Data Brief
Kis BM, Szalay R, Caracausi A, Randazzo P, Tóth TM, Palcsu L, Orsovszki J, Aiuppa A, Grassa F, Harangi S.   +9 more
europepmc   +1 more source

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

Scenario-based forecast of the evolution of 75 years of unrest at Campi Flegrei caldera (Italy). [PDF]

Commun Earth Environ
Caricchi L, Lormand C, Carlino S, Pivetta T, Simpson G.   +4 more
europepmc   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Phase equilibria modelling of trace element evolution in arc magmas: implications for petrogenesis and copper porphyry indicators. [PDF]

Contrib Mineral Petrol
Soderman CR, Weller OM.
europepmc   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source