Results 51 to 60 of about 36,579 (273)
Oxygen isotope evidence for progressively assimilating trans-crustal magma plumbing systems in Iceland [PDF]
, 2022 Alberto Caracciolo +9 more
openalex +1 more source
Geostandards and Geoanalytical Research, EarlyView.Key Points Six new Ca‐Mg‐Fe carbonate reference materials are available to the global geochemical community for calibrating oxygen and carbon isotope ratios by SIMS. Significant compositional matrix effects were observed in the dolomite‐ankerite and magnesite‐siderite series during SIMS analysis. Compositional matrix effects correlate with Fe variation.
Maria Rosa Scicchitano +10 more
wiley +1 more source
Computadores aplicados a la clasificación química de las rocas ígneas. Métodos C.l.P.W. y NIGGLI
Boletín Geológico, 1972 Existen diversos métodos para clasificar las rocas de acuerdo a su análisis químico. Uno de los más empleados ha sido el de C.I.P. W. que da una composición teórica calculada o normativa. Al contrario de la composición actual o modal de la misma. Esta
Humberto González lregui
doaj +1 more source
Sampling the volcanic plumes at Io: Impact speeds and shock conditions
Meteoritics &Planetary Science, EarlyView.Abstract The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that ...
M. J. Burchell +2 more
wiley +1 more source
Yankuang ceshi, 2017 The Xinliaodong copper-polymetallic deposit of Eastern Guangdong Province is one of newly discovered deposits. The ore district belongs to tin, tungsten, and copper ore cluster in the southeast coast, which have a very good ore-forming geological ...
FAN Fei-peng +8 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, 2020 Large silicic magma reservoirs preferentially form in the upper crust of extensional continental environments. However, our quantitative understanding of the link between mantle magmatism, silicic reservoirs, and surface deformation during rifting is ...
J. Gottsmann +4 more
doaj +1 more source
Boulder of orbicular rapakivi in Taivassalo, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 A boulder of an orbicular rapakivi was found in Taivassalo, close to the southern contact of the Vehmaa rapakivi area in southwestern Finland. Many features, e.g.
N. Edelman
doaj +1 more source
Heidegger and Levinas on the phenomenology of the hand: Between work and gesture
The Southern Journal of Philosophy, EarlyView.Abstract This article explores how Heidegger and Levinas develop distinct phenomenological accounts of the hand. Both thinkers refuse to treat the hand as merely an anatomical organ, instead viewing it as an essential dimension of human existence. Yet their interpretations diverge sharply. In the first section, I show how Heidegger grounds the function
Cristian Ciocan
wiley +1 more source
Cryogenian Glacial Erosion and Tectonics as Agents of Crustal Recycling
Terra Nova, EarlyView.ABSTRACT Zircon preserves evidence of recycling processes that link surface environments to the mantle. Combined δ18O‐εHf in zircon fingerprints magmatic sources and tracks how crustal material is reworked over time. We apply statistical analyses to a global compilation that apparently resolves shifts in zircon U–Pb, δ18O, and Lu‐Hf data spanning the ...
M. Seraine +9 more
wiley +1 more source
Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone
Terra Nova, EarlyView.ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong +5 more
wiley +1 more source