Results 111 to 120 of about 30,445 (262)

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

open access: yesApplied 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

SR-FTiR microscopy and FTIR imaging in the earth sciences

open access: yes, 2013
During the last decades, several books have been devoted to the application of spectroscopic methods in mineralogy. Several short courses and meetings have addressed particular aspects of spectroscopy, such as the analysis of hydrous components in ...
Bellatreccia, F.   +2 more
core   +1 more source

Mineral chemistry, petrography and crystallization conditions of the Middle Eocene Kazıkbeli Pluton (Eastern Pontides, NE Türkiye)

open access: yesBulletin of the Mineral Research and Exploration
The Eastern Pontides host a diverse suite of plutonic rocks spanning a wide range of ages and compositions. Among these, the Middle Eocene Kazıkbeli pluton, located in the Kürtün districtof Gümüşhane, stands out due to its distinctive petrological ...
Cem Yücel   +3 more
doaj   +1 more source

Petrology of blueschist facies metamorphic rocks of the Meliata Unit [PDF]

open access: yesActa Montanistica Slovaca, 1997
Meliata blueschists originated from basalts, limestones, pelites, psammitic and amphibolite facies basement rocks. Compositionally, the metabasalts have a geochemical signature mostly indicative of a transitional arc-MORB origin, but some mafic rocks ...
Faryad Shah Wali
doaj  

Trace element geochemistry of peridotites from the Izu-Bonin-Mariana Forearc, Leg 125

open access: yes, 1992
Trace element analyses (first-series transition elements, Ti, Rb, Sr, Zr, Y, Nb, and REE) were carried out on whole rocks and minerals from 10 peridotite samples from both Conical Seamount in the Mariana forearc and Torishima Forearc Seamount in the Izu ...
Ingram, G.   +4 more
core   +1 more source

Cl-rich minerals in Archean granulite facies ironstones from the Beartooth Mountains, Montana, USA: Implications for fluids involved in granulite metamorphism [PDF]

open access: yes
The implications of Cl-rich minerals in granulite facies rocks are discussed. Results from ironstones of the Beartooth Mountains, Montana are discussed. It is suggested that CO2-brine immiscibility might be applicable to granulite facies conditions, and ...
Henry, D. J.
core   +1 more source

Experimental phase equilibria constraints on pre-eruptive storage conditions of the Soufreiere Hills magma [PDF]

open access: yes, 1998
Aspinall   +21 more
core   +1 more source

Bright sand/dark dust: The identification of active sand surfaces on the Earth and Mars [PDF]

open access: yes
Field studies and analysis of LANDSAT Thematic Mapper data in the Gran Desierto, Mexico may shed light on a technique to distinguish active from inactive (relict) sand surfaces.
Arvidson, R.   +3 more
core   +1 more source

COMPOSITIONAL AND PETROGENETIC FEATURES OF SCHISTOSE ROCKS OF IBADAN AREA, SOUTHWESTERN NIGERIA

open access: yesEarth Sciences Research Journal, 2009
Amphibole and quartz schist which occur in association with migmatite gneiss, granitic gneiss and Pan African Older Granitebodies around Ibadan area, southwestern Nigeria, were studied with a view to elucidate their compositional characteristics andtheir
Oluwatoke O.O.   +2 more
doaj  

Petrologic evidence for pressure-temperature conditions and recent reheating of andesitic magma erupting at Soufriere Hills Volcano, Montserrat, WI [PDF]

open access: yes, 1998
Andersen   +28 more
core   +1 more source

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