Results 21 to 30 of about 3,855 (216)

Assessing the Validity of Negative High Field Strength-Element Anomalies as a Proxy for Archaean Subduction: Evidence from the Ben Strome Complex, NW Scotland

Geosciences, 2018
The relative depletion of high field strength elements (HFSE), such as Nb, Ta and Ti, on normalised trace-element plots is a geochemical proxy routinely used to fingerprint magmatic processes linked to Phanerozoic subduction.
George L. Guice, Iain McDonald, Hannah S. R. Hughes, Denis M. Schlatter, Kathryn M. Goodenough, John M. MacDonald, John W. Faithfull   +6 more
doaj   +1 more source

Supporting Information for 'Formation of late Miocene silicic volcanic rocks in the central Tibetan Plateau by crustal anatexis of granulites'

, 2022
Supporting Information for 'Formation of late Miocene silicic volcanic rocks in the central Tibetan Plateau by crustal anatexis of ...
Quan Ou (8202621)
core   +1 more source

Precambrian intraplate magmatism: high temperature low pressure granulites.

, 1999
Starting from the hypothesis that the lower continental crust is dominated by granulites, some essential features of granulites are recalled. Two general P-T-t paths are possible, clockwise and anticlockwise, of which the former is more common for high ...
Huizenga, J.M., Touret, J.L.R., Jan M. Huizenga, Jacques L.R. Touret   +3 more
core   +1 more source

Implication of Dynamic Recrystallization Mechanism for the Exhumation of Lower Crustal Rocks: A Case Study in the Shear Zones of the Ambaji Granulite, NW India

Lithosphere, 2022
Shear zones are important channels for the exhumation of lower crustal rocks. The Ambaji granulite of the Aravalli-Delhi mobile belt (ADMB) has been exhumed along several shear zones, and earlier studies have shown a two-stage exhumation process during a
Sudheer Kumar Tiwari, Anouk Beniest, Priti Rai, Sohini Chatterjee, Ruturaj Vilas Daphale, Tapas Kumar Biswal, Anand Kumar Yadav, Subha Kundu   +7 more
doaj   +1 more source

Geochemistry of the Guaxupe Granulites, Minas Gerais, Brazil

, 1998
Geochemical data for granulite terrain are presented from the northernmost portion of the Guaxupe Massif, at Mantiqueira Province, SE Brazil. Several types of granulites are recognized in the area: basic, intermediate and acid granulite.
de Oliveira, MAF, Del Lama, E. A., Zanardo, A.   +2 more
core   +1 more source

Timing of retrograde metamorphism in medium-pressure pelitic granulites of the Qianlishan Complex: insights from monazite-zircon U-Pb geochronology and phase equilibria modelling

Frontiers in Earth Science
Accurately determining the retrograde metamorphic ages of pelitic granulites is crucial for reconstructing their metamorphic evolution and understanding associated post-collisional extensional and subsequent exhumation processes in orogenic belts.
Shangjing Wu, Yige Su, Qin Wang, Hengzhong Qiao   +3 more
doaj   +1 more source

Sensitive high-resolution ion microprobe U-Pb dating of prograde and retrograde ultrahigh-temperature metamorphism as exemplified by Sri Lankan granulites [PDF]

, 2010
Ultrahigh-temperature (UHT) granulites of the central Highland Complex, Sri Lanka, underwent some of the highest known peak temperatures of crustal metamorphism. Zircon and monazite U-Pb systems in granulites near Kandy, the highest grade region (~1050
Osanai, Y, Williams, Ian, Sajeev, K., I.S. Williams, K. Sajeev, Y. Osanai   +5 more
core   +1 more source

Petrology of granulites from Anakapalle-evidence for Proterozoic decompression in the Eastern Ghats, India

, 1994
The granulite complex at Anakapalle, which was metamorphosed at ~1000 Ma, comprises orthopyroxene granulites, leptynite, khondalite, mafic granulites, calc-silicate rock, spinel granulites, and two types of sapphirine granulites-one quartz-bearing and ...
Dasgupta, Somnath, Sanyal, Sanjoy, Sengupta, Pulak, Fukuko, M.   +3 more
core   +1 more source

Ion microprobe (SHRIMP) dates complex granulite from Santa Catarina, southern Brazil

Anais da Academia Brasileira de Ciências, 2000
Complex polymetamorphic granulites have been dated in the Santa Catarina granulite complex of southern Brazil through SHRIMP study of zircon. This complex is dominated by intermediate-acid plutonic rocks and contains small volumes of mafic and ultramafic
LÉO A. HARTMANN, JOÃO O. S. SANTOS, NEAL J. McNAUGHTON, MARCOS A. Z. VASCONCELLOS, LUIZ C. DASILVA   +4 more
doaj   +1 more source

The rare earth element geochemistry of mafic granulites from the Neoarchaean northern marginal zone of the Limpopo Belt

, 2022
The granulites of the Northern Marginal Zone of the Limpopo belt, Zimbabwe represent the lower crust of the Zimbabwe Craton. They are predominantly felsic in composition and represent magmas of the tonalite-trondhjemite-granodiorite suite which formed ...
Rollinson, H.
core   +1 more source