Results 91 to 100 of about 5,229 (211)

Adakitic post-Miocene magmatism of Qaraie sub-volcanic dome, Mahneshan area (west of Zanjan)

open access: yesJournal of Economic Geology
Qaraie sub-volcanic dome in the west of Zanjan is part of the Urumieh-Dokhtar magmatic arc in the Central Iran zone. Qaraie dome with columnar joints was intruded into the Upper Red Formation sequence and Kahrizbeik granitoid intrusion with Upper ...
Sajad Moseni Badalabadi   +2 more
doaj   +1 more source

ENERGY-DISPERSIVE X-RAY FLUORESCENCE (EDXRF) ANALYSIS OF MAJOR OXIDE AND TRACE ELEMENT CONCENTRATIONS FOR RHYOLITE AND DACITE PROJECTILE POINT FRAGMENTS FROM THE TULAROSA BASIN, SOUTHERN NEW MEXICO [PDF]

open access: yes, 2020
The non-destructive whole rock analysis here of three projectile point fragments from unknown provenience in the Tularosa Basin of southern New Mexico indicates that one of the artifacts was likely produced from the Socorro hydrothermally altered ...
Shackley, M. Steven
core  

Melt extraction with crystal entrainment from basaltic crystal mush, causing a dacitic pumice eruption from the mafic-dominant Iwate volcano, northern Honshu

open access: yesEarth, Planets and Space
The structure and evolution of the magma plumbing system that produced the dacitic Yukiura Pumice (YP) at Iwate volcano, northern Honshu, are constrained by petrography and rhyolite–MELTS simulations. The basaltic Yukiura Scoria (YS) eruption immediately
Tsukasa Ohba   +3 more
doaj   +1 more source

Mechanical behaviour of dacite from Mount St. Helens (USA): A link between porosity and lava dome extrusion mechanism (dome or spine)?

open access: yes, 2016
International audienceThere is a rich diversity in lava dome morphology, from blocky domes and lobes to imposing spine and whaleback structures. The latter extrude via seismically active, gouge-rich conduit-margin faults, a manifestation of a brittle ...
Russell, Kelly   +5 more
core   +1 more source

Dacite origins during a compositional shift in eruptive products at Middle Sister volcano, Oregon Cascades [PDF]

open access: yes
The Three Sisters Volcanic Complex (TSVC) in the Oregon Cascades provides a unique framework for investigating trans-crustal magmatic systems and intermediate magma petrogenesis at arc systems, due to its compositional variability (erupting the full ...
Ernst, Olivia C.
core  

The gabbro dacite blend as soil remineralizer

open access: yesRevista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences, 2022
F.J.P. Silva   +2 more
openaire   +2 more sources

On the dacite-granodiorite contact relations in the Warburton area

open access: yes, 1932
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

Trepça Ore Belt and Stan Terg mine – Geological overview and interpretation, Kosovo (SE Europe)

open access: yesGeologija, 2010
The Trepça Belt of Pb-Zn-Ag mineralization is located within the NNW-SSE trending Vardar zone. The Beltextends for over 80 km, and supported five mines during the period 1930-2008. It contains a number of the otherPb-Zn occurrences too.
Sylejman Hyseni   +5 more
doaj  

The rhyolite-dacite-granodiorite association of the Dandenong Ranges

open access: yes, 1956
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

High-Na dacite from the Jean-Charcot Trough

open access: yes, 1994
197 Nakada, S., Maillet, P., Monjaret, M.-C., Fujinawa, A. and Urabe, T., 1994. High-Na dacite from lhe Jean Charcot Trough (Vanuatu), Southwest Pacific. In: J.-M. Auzende and T. Urabe (Editors), North Fiji Basin: STARMER French-Japanese Program.
Setsuya Nakada   +4 more
core  

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