Results 141 to 150 of about 241 (183)

Migmatite formation at subsolidus conditions–an alternative to anatexis

Journal of Metamorphic Geology, 1985
Abstract This contribution discusses the formation of stromatic high‐grade migmatites. Volume considerations require that most of the leucosome material is not added from outside the system. A segregation mechanism is necessary except in those cases where the protolith of the migmatite already had a banded structure.
ANDERS LINDH, CARL‐HENRIC WAHLGREN
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The Cooma Granodiorite, Australia: An example of in situ crustal anatexis?

Geology, 1978
Data suggesting that the Cooma Granodiorite, New South Wales, Australia, originated by essentially in situ anatexis of adjacent metasedimentary rocks are in apparent conflict with the low-pressure metamorphic environment, unless unrealistically high and localized geothermal gradients (about 55 °C/km) are invoked.
R. H. Flood, R. H. Vernon
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Dating crustal anatexis in UHT granulites with Lu-Hf

2020
<p>Ultra-high temperature (UHT) metamorphism is a thermal regime that can be attained by the lower continental crust in exceptional contexts and that is usually accompanied by fluid-absent dehydration melting. Such conditions are observed in the Gruf Complex, a 12 x 10 km migmatitic body located in the Central Alps, which is ...
Omar Gianola, Bernardo Cesare, Omar Bartoli, Fabio Ferri, Robert Anczkiewicz   +4 more
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Production of Jurassic rhyolite by anatexis of the lower crust of Patagonia

Earth and Planetary Science Letters, 1995
Abstract The mid-Jurassic Marifil and Chon-Aike volcanic rocks of eastern Patagonia are part of one of the largest silicic igneous provinces known. Rb Sr geochronology indicates eruptive ages of 175–190 Ma for the Marifil complex (mostly Toarcian-Aalenian).
Pankhurst, R.J., Rapela, C.R.
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Anatexis, Formation of Migmatites, and Origin of Granitic Magmas

1965
In metamorphic terrains, high-grade metamorphic rocks are spatially, and presumably genetically, related to migmatites. Read (1957) describes this general observation as follows: “One of the most firmly established facts in metamorphic geology is the close association in the field of highest-grade metamorphic rocks and migmatites.”
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Anatexis, Migmatitbildung und Palingenese granitischer Magmen

1965
Metamorphe Gesteine der hochgradigen Amphibolitfazies sind eng vergesellschaftet mit Migmatiten. Diese generelle Gelandebeobachtung beschreibt Read (1957) folgendermasen: „One of the most firmly established facts in metamorphic geology is the close association in the field of highest-grade metamorphic rocks and migmatites.“
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Granites and crustal anatexis

Lithos, 2007
T. Andersen, O.T. Rämö
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Anatexis

2022
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Paleoproterozoic khondalites in Brazil: a case study of metamorphism and anatexis in khondalites from Itapecerica supracrustal succession of the southern São Francisco Craton

International Geology Review, 2021
Daniel Andrade Miranda, Alexandre De Oliveira Chaves   +1 more
exaly  

Miocene Crustal Anatexis of Paleozoic Orthogneiss in the Zhada Area, Western Himalaya

Acta Geologica Sinica, 2022
Lingsen Zeng
exaly