Results 51 to 60 of about 3,223 (190)

Geo-structural map of the Laguna Blanca basin (Southern Central Andes, Catamarca, Argentina) [PDF]

open access: yes, 2015
The Laguna Blanca basin is a rhomb-shaped basin located at the SE margin of the Puna plateau in the southern Central Andes (Catamarca, Argentina). An interactive analysis using remote sensing and field mapping enabled us to produce a geo-structural map ...
Massironi, Matteo   +2 more
core   +2 more sources

Superimposed Folding of the Precambrian Metamorphic Rocks of the Lutzow-Holm Bay Region, East Antarctica (Earth Sciences) [PDF]

open access: yes, 1976
The Lutzow-Holm Bay region (latitude 69°S ; longitude 38°E to 40°E) is located in the Prince Olav Coast of Enderby Land of East Antarctica, where crystalline basement rocks extensively occur under the glacial cover.
Terumi ISHIKAWA
core   +1 more source

U-Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina) : correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane [PDF]

open access: yes, 2006
The Sierras Pampeanas of Argentina, the largest outcrop of pre-Andean crystalline basement in southern South America, resulted from plate interactions along the proto-Andean margin of Gondwana, from as early as Mesoproterozoic to Late Paleozoic times (e ...
C. Mark Fanning   +31 more
core   +4 more sources

Cambrian magmatism, Variscan high-grade metamorphism and imposed greenschist facies shearing in the Central Sredna Gora basement units (Bulgaria)

open access: yesGeologica Carpathica, 2015
Gneisses from the deep structural levels of the European Variscan Belt are well exposed in the Central Sredna Gora in Bulgaria. In general, migmatites predominate, but unmigmatized domains (or domains with incipient migmatization) are also documented in ...
Lazarova Anna   +3 more
doaj   +1 more source

Neoproterozoic crustal evolution in Southern Chad: Pan-African ocean basin closing, arc accretion and late- to post-orogenic granitic intrusion. [PDF]

open access: yes, 2006
International audienceIn the Lake Léré region, southern Chad, Neoproterozoic terrains are distributed in four lithostructural groups that reveal the geotectonic evolution of a part of the Pan-African orogenic domain.
Doumnang, J.C.   +4 more
core   +3 more sources

Geochemistry and Petrogenesis of Metabasites from the Votuverava Group (Apiaí Terrane, Southern Ribeira Belt): Evidence of a Calymmian Back-arc Basin Frederico [PDF]

open access: yesGeologia USP. Série Científica, 2011
The Votuverava Group (ca. 1500 - 1400 Ma), which is part of the Apiaí Terrane, a segment of the Southern RibeiraBelt, is composed of distal turbidites with signifi cant basic magmatism represented by concordant lenses of metabasite.Twenty metabasite ...
Frederico Meira Faleiros   +3 more
doaj  

The Barreiro suite in the central Ribeira Belt (SE-Brazil): a late Tonian tholeiitic intraplate magmatic event in the distal passive margin of the São Francisco Paleocontinent

open access: yesBrazilian Journal of Geology, 2019
New geochemical, U-Pb, Lu-Hf and Sr-Nd data from the Barreiro Suite metabasites in comparison with enclaves within the distal Andrelândia Group and the orthogranulites of the Juiz de Fora Complex are presented. Geochemical data suggest intraplate setting,
Monica Heilbron   +9 more
doaj   +1 more source

Evidence of a Temperature-dependent ‘Blueschist' to ‘Eclogite' Transformation in High-pressure Metamorphism of Metabasic Rocks [PDF]

open access: yes, 2017
Textures in the blueschist metabasic rocks of the island of Syros, Greece, indicate a reaction forming omphacite and garnet from earlier glaucophane and epidote.
RIDLEY, JOHN
core  

Cold subduction and the formation of lawsonite eclogite - constraints from prograde evolution of eclogitized pillow lava from Corsica [PDF]

open access: yes, 2010
International audienceA new discovery of lawsonite eclogite is presented from the Lancône glaucophanites within the Schistes Lustrés nappe at Défilé du Lancône in Alpine Corsica.
Andersen, Torgeir B.   +3 more
core   +3 more sources

Île Dumet (Armorican Massif, France) and its glaucophane eclogites: the little sister of Île de Groix [PDF]

open access: yesEuropean Journal of Mineralogy
Blueschist-facies rocks are scarce within the Variscan orogen. Two main occurrences are known in the Armorican Massif (NW France), at Île de Groix and Bois-de-Céné.
G. Godard   +5 more
doaj   +1 more source

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