Results 81 to 90 of about 297,462 (204)

New U-Pb zircon data for Maarianvaara granite and Tohmajärvi volcanic complex, eastern Finland: geologic implications [PDF]

Bulletin of the Geological Society of Finland
New U-Pb zircon ages reported for samples from the Maarianvaara granite and Tohmajärvi volcanic complex (TVC) corroborate previous estimates of their magmatic emplacement at ca. 1.85 Ga and 2.11 Ga, respectively. The ca.
Asko Kontinen, Jarmo Kohonen, Perttu Mikkola, Matti Kurhila   +3 more
doaj   +1 more source

Stratigraphy and structure of Mesozoic metavolcanic rocks in the vicinity of Mt. Dana, Yosemite National Park, California.

, 1976
Mt. Dana is one of several high peaks along the Sierra Nevada crest on the eastern boundary of Yosemite National Park (Fig. 1). The mountain is underlain by metamorphic rocks which form the northern extension of the Ritter Range roof pendant, an elongate
Russell, Stephen John.
core  

Provenance of the Late Ediacaran Minas de Corrales Formation, Nico Pérez Terrane, Uruguay: paleogeographic implications

Frontiers in Earth Science
The Nico Pérez Terrane, located in the eastern margin of the Río de la Plata Craton, played a critical role in the assembly of SW Gondwana. The Isla Cristalina de Rivera basement klippe represents the northernmost exposures of the Nico Pérez Terrane in ...
Paulina Abre, Gonzalo Blanco, Dirk Frei
doaj   +1 more source

Geochemistry and petrology of the Cambrian metavolcanic rocks of the Sierra de San Luis [PDF]

, 2020
En la presente investigación se estudiaron las metavolcanitas ácidas del Cámbrico, localizadas en dos fajas de bajo metamorfismo de la sierra de San Luis. Se describe la petrografía, se presentan análisis químicos y se establece su posición geotectónica.
Poma, Stella Maris, Kronegold de Brodtkorb, Milka Aniela Sofía, Brodtkorb, Mika K. de, Pezzutti, Norma E., Pezzutti, Norma, Fernández, Raúl Roberto   +5 more
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Nagssugtoqidian supracrustal metavolcanic rocks of Sarfartûp nunâ, Søndre Strømfjord, central West Greenland

Rapport Grønlands Geologiske Undersøgelse, 1974
The area discussed here is situated 8 km north of the Sukkertoppen Iskappe and 10 km east of Søndre Strømfjord at 66°27'N, 51°50'W. The work was undertaken during August as part of the programme led by Dr. J. Watterson (see this report). The outcrop of supracrustal metavolcanic rocks is less than 15 km2 in extent.
J.N Diggens, C Talbot
openaire   +2 more sources

Geochemical Constraints on the Nature and Tectonic Setting of Metavolcanic Rocks in the Roanoke Rapids Terrane, Eastern Piedmont, Virginia

, 2009
The main purpose of this study was to provide a general reconnaissance of the metavolcanic rocks of the Roanoke Rapids terrane (RRT) of the southern Piedmont of Virginia, including protolith type and likely tectonic setting.
Hanger, Tessa M.
core   +1 more source

Precambrian crustal evolution and Cretaceous–Palaeogene faulting in West Greenland: The Nordre Strømfjord shear zone and the Arfersiorfik quartz diorite in Arfersiorfik, the Nagssugtoqidian orogen, West Greenland [PDF]

Geological Survey of Denmark and Greenland Bulletin, 2006
The Nordre Strømfjord shear zone in the fjord Arfersiorfik, central West Greenland, consists of alternating panels of supracrustal rocks and orthogneisses which together form a vertical zone up to 7 km wide with sinistral transcurrent, ductile ...
Stensgaard, Bo Møller, Glassley, William E., Korstgård, John A., Sørensen, Kai   +3 more
doaj  

Middle Cretaceous silicic metavolcanic rocks in the Kings Canyon area, central Sierra Nevada, California

, 1990
Metamorphosed silicic volcanic and hypabyssal rocks of middle Cretaceous (110 to 100 Ma) age occur in two roof pendants in the Kings Canyon area of the central Sierra Nevada. The metavolcanic remnants are similar in age to or are only slightly older than
Nokleberg, Warren J., Moore, James G., Longiaru, Samuel, Kistler, Ronald W., Saleeby, Jason B.   +4 more
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Geology and petrology of the kösedağ metavolcanic rocks to the south of Tosya

, 2020
Kösedağ metavolkanik kayaları, güney Orta Pontidler'de, Tosya'nın güneyinde KD-GB uzanımlı bir kuşak boyunca yüzlek verirler. Birim metasedimanter litolojilerle ardalanan metavolkanik kayalardan oluşur. Kösedağ Metavolkanikleri kuzeyde Kuzey Anadolu Fay'ı ile sınırlanırken, güneyde Dikmen Formasyonu'nun metakarbonatlarını tektonik ...
openaire   +1 more source

Gold mobility in subduction zones, the slab perspective

Communications Earth & Environment
Arc environments are locally gold-endowed and it has been long hypothesized that gold mobilization during slab dehydration could affect mantle composition and arc Au-fertility.
Clifford G. C. Patten, Alexandre Peillod, Simon Hector, Barbara I. Kleine-Marshall, Aratz Beranoaguirre, Antonin Bilau, Kirsten Drüppel, Jesse B. Walters, Iain Pitcairn, Uwe Ring, Alasdair Skelton, Jochen Kolb   +11 more
doaj   +1 more source