Results 31 to 40 of about 3,223 (190)

The metabasites from the Texel Unit (Austroalpine nappe stack): markers of Cretaceous intracontinental subduction and subsequent collision

open access: yesAustrian Journal of Earth Sciences, 2023
Abstract Eclogites in the Texel Unit (Austroalpine nappe stack; Eastern Alps, South Tyrol, Italy) represent the westernmost out-crops of the E-W striking Eoalpine High-Pressure Belt (EHB). East of the Tauern Window, the EHB forms part of a Cretaceous intracontinental south-dipping subduction/collision zone.
Tropper, Peter   +3 more
openaire   +2 more sources

Absolute Ages and Geological Investigations on the Rocks in the Area of Around Syowa Station, East Antarctica

open access: yesAntarctic Record, 1974
The K-Ar age determination on micas from the metamorphic rocks and granites in the Ongul Islands and Lang Hovde areas gave the following results: Metabasites 463, 467, 515, 517, 533 and 539 m.y. Biotite gneiss 560 m.y.
Keizo YANAI, Yoshio UEDA
doaj   +1 more source

Geochemistry, Lu–Hf garnet ages, and P–T conditions of blueschists from the Meliatic and Fatric nappes, Western Carpathians: Indicators of Neotethyan subduction

open access: yesGeosystems and Geoenvironment, 2023
Basaltic rocks from ophiolitic mélanges provide information on geodynamic setting, origin, and later tectonometamorphic conditions. This paper resolves the P–T conditions and timing of high-pressure metamorphism in an accretionary wedge that formed ...
Marián Putiš   +4 more
doaj   +1 more source

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

open access: yes, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge   +4 more
core   +2 more sources

Miocene metabasites of the hanaoka area, northern akita prefecture.

open access: yesJOURNAL OF MINERALOGY, PETROLOGY AND ECONOMIC GEOLOGY, 1990
In the Hanaoka mining area of the “Green Tuff” region, the Miocene submarine lavas and pyroclastic rocks with basaltic to andesitic compositions were recrystallized at low temperatures to form various secondary minerals. The upper metabasites are characterized by the mineral assemblage of prehnite-pumpellyite facies; i.e.
Tatuhiro Tanokura, Hitoshi Onuki
openaire   +2 more sources

Geology of the West Yamato Nunataks, East Antarctica

open access: yesAntarctic Record, 1975
Seven nunataks, provisionally named the West Yamato Nunataks, located at 30 km southwest of A group of the Yamato Mountains were briefly investigated by the present author in 1973.
Kazuyuki SHIRAISHI
doaj   +1 more source

Historical Use of Lime in Some Islands of the Tuscan Archipelago (Italy) Where Stone for Lime Is Almost Absent

open access: yesGeosciences, 2023
The Tuscan Archipelago lies between the Ligurian Sea to the north and the Tyrrhenian Sea to the south and between Corsica to the west and the Tuscan coast to the east.
Silvia Rescic   +2 more
doaj   +1 more source

Química mineral de les amfibolites de Bordelle i dels gneis de Lousada (Lugo, Zona Asturoccidental-Lleonesa del Massís Ibèric) [PDF]

open access: yes, 2014
Les metabasites i els gneis que afloren en la Zona Asturoccidental-Lleonesa han estat relacionats amb una activitat magmàtica lligada a un episodi de distensió.
Universitat Autònoma de Barcelona. Facultat de Ciències   +1 more
core  

Diamond formation in the deep mantle: the record of mineral inclusions and their distribution in relation to mantle dehydration zones [PDF]

open access: yes, 2010
Studies of the inclusions contained in natural diamonds have shown the occurrence of minerals which must have formed at depths below the lithosphere and which may be closely matched with the silicate mineral assemblages determined by high pressure and ...
B. Harte   +26 more
core   +1 more source

Home - About - Disclaimer - Privacy