Results 21 to 30 of about 446 (178)
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 4, April 2023., 2023 Abstract The Craters of the Moon (COM) Volcanic Field in Idaho is the largest mostly Holocene lava field in the conterminous U.S. and the site of the most recent volcanism in the Yellowstone‐Snake River Plain province. This prominent example of a polygenetic fissure field has produced over 60 eruptions over the past 15,000 years from the Great Rift ...
John Chadwick +2 more
wiley +1 more source
Boreas, Volume 52, Issue 2, Page 240-271, April 2023., 2023 Thirty‐two tephra layers were identified in the time‐interval 313–366 ka (Marine Isotope Stages 9–10) of the Quaternary lacustrine succession of the Fucino Basin, central Italy. Twenty‐seven of these tephra layers yielded suitable geochemical material to explore their volcanic origins. Investigations also included the acquisition of geochemical data of
Niklas Leicher +11 more
wiley +1 more source
Earth and Space Science, Volume 10, Issue 3, March 2023., 2023 Abstract The subduction initiation and the early‐stage tectonics of the southern Paleo‐Asian Ocean have rarely been discussed. To address these problems, we report new geochemical and geochronological data of arc‐related volcanic rocks in the Huaniushan arc of the southern Beishan.
Qigui Mao +9 more
wiley +1 more source
Petrology and geochemistry of igneous rocks and their relationship with mineralization in Talahoueieh area, north of Bam, Urumieh-Dokhtar Magmatic Arc [PDF]
پترولوژیIntroduction The Central Iran zone represents one of the most significant geological domains of Iran, characterized by a wide diversity of igneous, metamorphic, and sedimentary rocks formed through prolonged tectonic and magmatic processes.
Jalal Hassanshahi +2 more
doaj +1 more source
Shoshonitic intrusive suite in SE Guangxi: Petrology and geochemistry [PDF]
Chinese Science Bulletin, 2000 A NE-direction Mesozoic shoshonitic intrusive suite in SE Guangxi has been identified in terms of geological, petrological and geochemical investigations. The shoshonitic intrusives are characterized by enrichment of LILE, HFSE and LREE and no obvious Nb-Ta depletion, similar to those potassic rocks formed in within-plate and rifting environments ...
Li, Xianhua +5 more
openaire +3 more sources
Frontiers in Earth Science, 2022 Chlorine isotopes have emerged as a new geochemical tool over the past 15 years. Most of the data consist of bulk rock data, with a minority carried out in situ on melt inclusions using secondary ion mass spectrometry.
Anne-Sophie Bouvier +2 more
doaj +1 more source
Petrology and mineralogy of the Ulaan Del Zr-Nb-REE deposit, Lake Zone, Western Mongolia
Mongolian Geoscientist, 2020 The Ulaan Del deposit is located in the Lake Zone, Western Mongolia. In the area, middle-late Devonian alkali dykes of the Khalzan Complex are hosted in the middle-late Cambrian granodiorite-tonalite of the Togthohiinshil Complex. The alkali dykes of the
Sanjsuren Oyunbat
doaj +1 more source
Metagabbros, metasyenites and related rocks in the Outokumpu assemblage, east Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 A diverse group of minor intrusive rocks in the early Proterozoic Outokumpu assemblage of eastern Finland include metagabbro, hornblendite, amphibolite, pyroxenite, syenite and chloritized dykes.
A.F. Park
doaj +1 more source
Primitive shoshonites from Fiji: Geochemistry and source components [PDF]
Geochemistry, Geophysics, Geosystems, 2009 The eruption of shoshonitic magmas in Fiji during the Late Miocene‐Pliocene (5.5–3 Ma) from 11 main volcanic centers along three broad ENE and NNW trending lineaments coincides with well‐developed spreading in the North Fiji and Lau back‐arc basins and maximum rotation of the Fiji Platform.
Roman A. J. Leslie +3 more
openaire +1 more source
Frontiers in Earth Science, 2020 The Batié granitic massif in western Cameroon is NE–SW elongated, follows the regional foliation, and is parallel to the Kekem–Fotouni shear zone, which is the southwestern extension of the Tcholliré–Banyo Fault (TBF).
Maurice Kwékam +5 more
doaj +1 more source