Results 81 to 90 of about 28,093 (233)

Controls on Iron‐Redox State in Martian Magmas Quantified by Mössbauer Spectroscopy, Colorimetric Wet Chemistry, and XANES Spectroscopy

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract To elucidate the relationship between oxygen fugacities (fO2) recorded in martian basalts and redox processes in the martian interior, superliquidus 100‐kPa furnace experiments on a composition similar to Humphrey (Adirondack basalt) were conducted at variable fO2 and temperature. Quenched glasses were analyzed by EPMA, Mössbauer spectroscopy,
S. P. Aithala, R. A. Lange, M. M. Hirschmann   +2 more
wiley   +1 more source

Petrogenesis of the Lalezar granitoid intrusions (Kerman Province - Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2015
The Lalezar granitoids crop out within volcanic successions of the Urumieh-Dokhtar Magmatic Assemblage (UDMA). These granitoids have a range from gabbro-diorites to granites in composition.
S. M. Niktabar, A. Moradian, H. Ahmadipour1, J. F. Santos, M. H. Mendes   +4 more
doaj  

Oxygen-isotope and trace element constraints on the origins of silica-rich melts in the subarc mantle [PDF]

, 2007
Peridotitic xenoliths in basaltic andesites from Batan island in the Luzon arc contain silica-rich (broadly dacitic) hydrous melt inclusions that were likely trapped when these rocks were within the upper mantle wedge underlying the arc.
Eiler, J. M., Kita, N. T., Schiano, P., Stolper, E. M., Valley, J. W.   +4 more
core   +5 more sources

Geology, alteration, age dating and petrogenesis of intrusive bodies in Halak Abad prospect area, NE Iran

Journal of Economic Geology, 2014
The Halak Abad prospect occurs in the northeastern part of Central Iran zone (Sabzevar structural zone). In this investigation, geochemical evolution, age and source of part of northeastern Iran magmatic arc (intrusive bodies) in Halak Abad area in the ...
Maliheh Ghourchi, Mohammad Hassan Karimpour, J. Lang Farmer, Charles Stern   +3 more
doaj  

The Petrogenesis and Geological Implications of the Sanggeda Gabbros, Southern Tibet: Insights from the Amphibole Crystal Population

Applied Sciences
Amphibole is an important mineral during the differentiation of arc magmas but rarely as a phenocryst in arc lavas or eruptive pyroclastic rocks. The Sanggeda complex, intruded into the ophiolite of the Indus–Yarlung Zangbo Suture Zone (IYZSZ), Zedong ...
Xiumin Jiang, Zhaohua Luo, Xiao Liu
doaj   +1 more source

ZIRCON IN HIGH‐MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS): MORPHOLOGY, GEOCHEMICAL SIGNATURE, AND PETROGENESIS IMPLICATIONS

Геодинамика и тектонофизика, 2019
The article is focused on the morphology, trace element composition, U‐Pb and Lu‐Hf systems in zircon in high‐Mg diorite of the Chelyabinsk granitoid massif.
T. A. Osipova, G. A. Kallistov, M. V. Zaitseva   +2 more
doaj   +1 more source

Olivines in angrite LEW 87051: Phenos or xenos [PDF]

Nyquist et al. recently reported the presence of live Mn-53 in angrite LEW 86010 when it crystallized. Hence, melting must have occurred within approx.
Le, L., Mckay, G., Wagstaff, J.
core   +1 more source

Temperature-dependent thermal expansivities of silicate melts: The system anorthite-diopside [PDF]

, 1992
The temperature-dependent thermal expansivities of melts along the join anorthite-diopside have been determined on glassy and liquid samples using a combination of calorimetry, dilatometry, and Pt double bob Archimedean densitometry.
Dingwell, Donald B., Knoche, Ruth, Webb, Sharon L.   +2 more
core   +1 more source

The effect of F on the density of haplogranite melt [PDF]

, 1993
The densities and thermal expansivities of F-bearing haplogranitic glasses and liquids have been investigated using a combination of scanning calorimetry and dilatometry. F2O-1 reduces the density of haplogranitic liquids (at 750 °C) from 2.295 + 0.006 g/
Dingwell, Donald B., Knoche, Ruth, Webb, Sharon L.   +2 more
core   +1 more source

The Geochemistry, Petrogenesis, and Rare-Metal Mineralization of the Peralkaline Granites and Related Pegmatites in the Arabian Shield: A Case Study of the Jabal Sayid and Dayheen Ring Complexes, Central Saudi Arabia

Applied Sciences
The Neoproterozoic period in the Jabal Sayid and Dayheen areas is characterized by three distinct magmatic phases: an early magmatic phase of granodiorite–diorite association, a transitional magmatic phase of monzogranites, and a highly evolved magmatic ...
Hamdy H. Abd El-Naby, Yehia H. Dawood
doaj   +1 more source