Results 71 to 80 of about 6,694 (263)

Lunar Mg suite: Thermobarometry and petrogenesis of parental magmas [PDF]

Journal of Geophysical Research: Planets, 2001
Using compilations of internally consistent thermodynamic data on minerals and advances in quantifying the energetics of crystalline solid solutions, we have recalculated the pressures and temperatures of equilibration of troctolite sample 76535 and a number of spinel cataclasites. The five phase assemblage (olivine + orthopyroxene + clinopyroxene + Cr‐
I. S. McCallum, J. M. Schwartz
openaire   +1 more source

COMPLICATED THERMAL HISTORY OF THE LITHOSPHERIC MANTLE OF THE ANABAR REGION: RECONSTRUCTIONS BASED ON XENOCRYSTS FROM KIMBERLITES

Геодинамика и тектонофизика
The thermal history and thickness of the lithospheric mantlebeneath the kimberlite fields of the Eastern Anabar shield and adjacent territories of the Siberian craton were reconstructed based on the composition of clinopyroxene xenocrysts from the ...
А. M. Dymshits, E. A. Gladkochub, S. I. Kostrovitsky   +2 more
doaj   +1 more source

Elastic thermobarometry on metapelites across the crustal section of the Famatinian Arc, Argentina

Contributions to Mineralogy and Petrology
We applied elastic thermobarometry on garnet-bearing migmatites along two transects through the crustal section at Sierra Valle Fértil-La Huerta, Argentina.
Emanuel Giovanini, K. Befus, J. Otamendi, E. Cristofolini, T. Guerreiro, Miguel Cisneros   +5 more
semanticscholar   +1 more source

The Mesozoic along-strike tectono-metamorphic segmentation of Longmen Shan (eastern Tibetan plateau) [PDF]

, 2018
The Longmen Shan belt (eastern border of the Tibetan plateau) constitutes a tectonically active region as demonstrated by the occurrence of the unexpected 2008 Mw 7.9 Wenchuan and 2013 Mw 6.6 Lushan earthquakes in the central and southern parts of the ...
A. Robert, Airaghi, Airaghi, Airaghi, Ansberque, Arne, Beyssac, Billerot, Burchfiel, C. J. Warren, Chen, Cook, D. Deldicque, Deng, Densmore, Deschamps, Dirks, Dubacq, Godard, Guo, Harrison, Harrowfield, Huang, Huang, Hubbard, Hubbard, J. de Sigoyer, Jia, Jiang, Kapp, Kapp, Kirby, L. Airaghi, Lanari, Lanari, Li, Li, Li, Li, Liao, Lichun, Liu, Massonne, Meng, Meng, Michele, Passchier, Robert, Robert, Robert, Roger, Roger, Roger, S. Guillot, SBGMR (Sichuan Bureau of Geology and Mineral Resources), Sigoyer, Sigoyer, Stipp, Tan, Tan, Tian, Vidal, Vidal, Wang, Wang, Wang, Weller, Whitney, Worley, Xu, Xu, Xue, Yan, Zhang, Zhang, Zhang, Zhang, Zheng, Zheng, Zhou, Zhou   +80 more
core   +3 more sources

High‐Resolution P‐T‐Time Paths Across Himalayan Faults Exposed Along the Bhagirathi Transect NW India: Implications for the Construction of the Himalayan Orogen and Ongoing Deformation

Geochemistry, Geophysics, Geosystems, 2020
Pressure‐temperature (P‐T) conditions and high‐resolution paths from 11 garnet‐bearing rocks collected across Himalayan fault systems exposed along the Bhagirathi River (Uttarakhand, NW India) reveal the tectonic conditions responsible for their growth ...
Elizabeth J. Catlos, Theresa J. Perez, Oscar M. Lovera, Chandra Shekhar Dubey, Axel K. Schmitt, Thomas M. Etzel   +5 more
doaj   +1 more source

Application of Clinopyroxene Chemistry for Investigation of the physical conditions of ascending magma, a case study of volcanic rocks in the Aliabad area (Northwest of Nain)

Journal of Economic Geology, 2020
Introduction The Aliabad area is located in the northwest of Nain. Volcanic rocks of the Aliabad area have andesitic to rhyolitic composition. On the basis of petrographic investigations, porphyritic texture is the main texture of these rocks.
Rezvan Mehvari, Mortaza Sharifi
doaj   +1 more source

Garnet-Amphibolites Mineralogy and thermobarometry in Aliabad-Damagh (south of Hamedan, Sanandaj-Sirjan Zone) [PDF]

پترولوژی, 2017
The garnet-amphibolites in Aliabad-Damagh area, occurs as layers and are enveloped by staurolite-schist. They composed predominantly of garnet, hornblende, feldspar (± muscovite and quartz) with titanite, epidote, ilmenite and graphite as accessory ...
Ali Akbar Baharifar, Kwan Nang Pang, Sun Lin Chung, Yoshiyuki Iizuka   +3 more
doaj   +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]

, 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, Carlos W. Rapela, Carmen Galindo, Casquet, Casquet, Cesar Casquet, Corrievau, Damm, Edgardo Baldo, Galindo, Jose M. González-Casado, Juan A. Dahlquist, Kretz, Loewy, Martignole, McDonough, Pankhurst, Porcher, Powell, Ramos, Ramos, Ramos, Rapela, Rapela, Rivers, Robert J. Pankhurst, Thomas, Tosdal, Varela, Vavra, Vujovich, Wasteneys   +31 more
core   +4 more sources

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Amphibole and biotite of melanocratic rocks from the Ural granitic massifs: composition, relationship, petrogenetic consequences

Литосфера, 2020
Research subject. The article discusses the features of the relationship between biotite and amphibole on the example of magmatogene melanocratic rocks from a number of granitoid massifs of the Urals. These rocks form xenoliths and synplutonic intrusions
S. V. Pribavkin
doaj   +1 more source