Results 51 to 60 of about 3,855 (216)

Devonian deep-crustal metamorphism and exhumation in the Variscan Orogen: evidence from SHRIMP zircon ages from the HT-HP granulites and migmatites of the Góry Sowie (Polish Sudetes) [PDF]

, 2015
The high-temperature and high-pressure granulites in the internal zone of the Variscan belt are witnesses of deep crustal processes and subsequent exhumation of deeper lithospheric fragments.
Kryza, Ryszard, Fanning, Christopher
core   +1 more source

Research progress of the ultrahigh-temperature granulites in the Rauer Group, East Antarctica

Dizhi lixue xuebao, 2021
The Rauer Group (Rauer Islands), located in the eastern margin of the Prydz Tectonic Belt in East Antarctica, represents a composite high-grade metamorphic terrane consisting of Archaean and Mesoproterozoic rocks.
TONG Laixi, LIU Zhao, WANG Yanbin
doaj   +1 more source

P‐T Uncertainty in Subsolidus Metamorphic Systems: Sources, Patterns and Controls

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Phase equilibrium modelling of metamorphic rocks is subject to multiple, superimposed sources of uncertainty that affect pressure–temperature (P$$ P $$‐T$$ T $$) estimates, making it difficult to independently distinguish and evaluate the contribution of each source.
I. P. Cawood, T. Mackay‐Champion
wiley   +1 more source

High-pressure granulites (Retrograded Eclogites) from the Hengshan Complex, North China Craton: Petrology and tectonic implications

, 2001
Both high- and medium-pressure granulites have been found as enclaves and boudins in tonalitic-trondhjemitic-granodioritic gneisses in the Hengshan Complex. Petrological evidence from these rocks indicates four distinct metamorphic assemblages. The early
Zhao, G C, Zhao, G, Cawood, PA, Lu, L Z, Cawood, Peter Anthony, Wilde, SA, Lu, L, Wilde, S A   +7 more
core   +2 more sources

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Country rock contamination of marginal mafic granulites bordering the Nain Plutonic Suite : implications for mobilization of Sr during high-grade contact metamorphism [PDF]

, 1999
The marginal mafic granulites that locally border the Nain Plutonic Suite (NPS) have a range of initial Nd-isotope ratios that overlap with that of the NPS anorthosites and associated Nain dykes.
J. Tarney, S R Noble, J Tarney, A C Cadman, S.R. Noble, A.C. Cadman, Royse, Katherine, Noble, Stephen, Cadman, Andy, Tarney, John, K.R. Royse, K R Royse   +11 more
core   +1 more source

Multi‐Mineral Geochronology Across the Neoproterozoic Brasília Nappe Stack: Constraints on Thermal Resetting and Metamorphic Architecture

Terra Nova, EarlyView.
ABSTRACT The Southern Brasília Orogen formed during Western Gondwana's final assembly and comprises nappe systems piled against the São Francisco Craton. We present new rutile U–Pb ages from the lowermost Canastra Group (> 2.2 Ga) and the uppermost Carrancas Group (~560 Ma), integrated with published zircon, monazite, garnet, and mica ages from the ...
Rodrigo Irineu Cerri, Alex J. Choupina A. Silva, Tamiris Pagotti Gonçalves Pinto, Rodrigo Prudente de Melo, George Luiz Luvizotto, Regiane Andrade Fumes, Fabrício de Andrade Caxito, Renato Moraes   +7 more
wiley   +1 more source

Thermobarometry of garnet peridotites and granulites from the Blanský Les Massif [PDF]

, 2012
English abstract Granulites of Moldanubian Zone are usually characterized by the presence of HP/UHP rocks of mafic and ultramafic compositions. The relationships between UHP rocks and granulites and their metamorphic history are subjects of many ...
Urychová, Michala
core  

Transformational Faulting: The Case of Quartz‐Coesite

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Transformational faulting in olivine has been widely invoked as a possible triggering mechanism for deep‐focus earthquakes, yet its dynamics remain debated. It is unclear whether it requires the combined effects of heat release, volume change and mechanical strength contrast, or whether it can be triggered by any one of these alone.
Giulia Mingardi, Julien Gasc, Robert Farla, Marie Baïsset, Mathieu Soret, Damien Deldicque, Philippe Yamato, Matteo Alvaro, Alexandre Schubnel   +8 more
wiley   +1 more source

Stable isotope studies on granulites from the high grade terrain of Southern India [PDF]

, 1988
Fluid inclusion and petrologic characteristics of South India granulites and their bearing on the sources of metamorphic fluids are discussed. This paper served as a review and an introduction to the next paper by D. Jackson.
Jackson, D. H., Mattey, D. P., Harris, N. B. W., Santosh, M.   +3 more
core