Results 101 to 110 of about 4,058 (252)

The Val Biandino Intrusive Suite (central Southern Alps, N Italy): new geochronological and geochemical data on the Early Permian magmatic activity in the Southalpine Domain

open access: yesSwiss Journal of Geosciences
The Early Permian in the present-day Europe area was a time when a major tectonic shift occurred, leading from the tectonic collapse of the Variscan orogeny to the crustal extension and thinning that characterized the Early Permian times.
Stefano Zanchetta   +3 more
doaj   +1 more source

Volatile‐Assisted Intrusion and Autometasomatism of Leucogranites in the Khumbu Himalaya, Nepal

open access: yesThe Journal of Geology, 1999
Abstract Leucogranite crops out in the upper Imja Khola, Khumbu Himalaya, Nepal, where it makes up approximately 50% of the exposed bedrock. Leucogranites and their associated aplite‐pegmatites typically intruded as concordant sills, millimeters‐ to kilometers‐wide.
Weinberg, R, Searle, M
openaire   +1 more source

U-Pb AGE AND GEOCHEMICAL TYPIFICATION OF THE SARAM MASSIF ROCKS (WESTERN TRANSBAIKALIA): EARLY JURASSIC GRANITOID MAGMATISM

open access: yesГеодинамика и тектонофизика
The paper presents data on the geological position, age and features of the material composition of the Saram massif granitoids, located in the northwestern part of the Malkhan ridge of Western Transbaikalia.
A. L. Elbaev   +4 more
doaj   +1 more source

Extensive crystal fractionation of high-silica magmas revealed by K isotopes. [PDF]

open access: yesSci Adv, 2022
Wang ZZ   +6 more
europepmc   +1 more source

Fertility of metapelites and metagraywackes during leucogranite generation: an example from the Black Hills, U.S.A. [PDF]

open access: yes, 2000
In order to elucidate how mineralogy and composition of crustal sources influences production of leucogranite magmas, we modelled the potential fertility of a sequence of metapelites and metagraywackes from the Black Hills, South Dakota, U.S.A., using a ...
Cindy D. Bartlett, Peter I. Nabelek
core   +1 more source

Pleistocene melting and rapid exhumation of the Nanga Parbat massif, Pakistan: Age and P-T conditions of accessory mineral growth in migmatite and leucogranite [PDF]

open access: yes, 2009
Rapid Pleistocene exhumation of the core of the Nanga Parbat massif (northwestern Himalayan syntaxis) is inferred by combining U-Pb dates from monazite, xenotime, and zircon from migmatitic rocks and a leucogranite dike with pressure estimates that are ...
Crowley, JL   +10 more
core   +1 more source

Sillimanite-bearing shear zones in syntectonic leucogranite: fluid-assisted brittle-ductile deformation under amphibolite facies conditions [PDF]

open access: yes, 2002
In the Imja Kola valley (eastern Nepal), Miocene peraluminous leucogranite dykes were emplaced within transtensional shear zones synchronously with regional amphibolite–facies metamorphism in the metamorphic host rocks.
MUSUMECI, GIOVANNI
core   +1 more source

Interplay between deformation and magmatism during doming of the Archaean Shaw Granitoid Complex, Pilbara Craton, Western Australia [PDF]

open access: yes, 2004
The Shaw Granitoid Complex, one of the classic granitoid domes of the Archaean Pilbara Craton, Western Australia, evolved from a plutonic complex into a not, vert, similar60 km diameter steep-sided dome during migmatisation of the deep crust.
Pawley, M.J.   +2 more
core   +1 more source

LATE NEOPROTEROZOIC RARE-METAL LEUCOGRANITE FROM THE KHARIUSIKHA MASSIF OF YENISEI RIGDE: GENESIS AND RELATIONSHIP TO MAGMATISM OF A LARGE IGNEOUS PROVINCE

open access: yesГеодинамика и тектонофизика
The paper deals with the petrogeochemical composition and U-Pb (SHRIMP-II) age (753±6 Ma) of subalkaline leucogranites and syenites from the Khariusikha massif of the Yenisei Ridge, which contain rare-metal mineralization.
A. D. Nozhkin, O. M. Turkina
doaj   +1 more source

Neoproterozoic Anatexis of 2.9 Ga Old Granitoids in the Goiás-Crixás Archean Block, Central Brazil: Evidence From New SHRIMP U-Pb Data and Sm-Nd Isotopes [PDF]

open access: yesGeologia USP. Série Científica, 2003
The first SHRIMP U-Pb ages for granitoid rocks from the southern part of the Goiás-Crixás Archean Block (Caiçara andUvá complexes) are presented and discussed in combination with Sm-Nd isotopic data in order to elucidate the main aspectsof the geological
Márcio Martins Pimentel   +5 more
doaj  

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