Results 71 to 80 of about 2,637,113 (187)

Cryptic Paleomagnetic Complexity in the Ediacaran Egersund Dikes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract The Ediacaran Period (∼635–539 Ma) represents a critical interval in Earth's evolution, yet its paleomagnetic record remains complex and contentious. One of the few Ediacaran paleomagnetic results from Baltica considered robust is a pole from the ca.
Yi Xue, Mathew Domeier, Petter Silkoset, Leandro C. Gallo, Justin A. D. Tonti‐Filippini, Harald J. Walderhaug   +5 more
wiley   +1 more source

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 311-336, May 2026.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum, Tereza Nemeškalová, Martin Racek, Vojtěch Janoušek, Julian Portenkirchner, Rainer Abart   +5 more
wiley   +1 more source

From subduction to collision. a combined metamorphic, structural and geochronological study of polymetamorphic metasediments at the NE edge of the Lepontine dome (Swiss Central Alps) [PDF]

, 2009
This study analyses the tectono-metamorphic evolution of metasedimentary units belonging to the Valaisan and adjacent European domains at the north-eastern border of the Lepontine dome (Central Alps).
Wiederkehr, Michael
core   +1 more source

Coesite Discovery in Eclogites Confirms UHP Metamorphism in the Orlica‐Śnieżnik Dome (SW Poland)

Journal of Metamorphic Geology, Volume 44, Issue 3, Page 200-225, April 2026.
ABSTRACT Eclogite lenses are exposed within the orthogneiss‐dominated core of the Orlica‐Śnieżnik Dome in the Sudetes, which forms the northeastern margin of the Bohemian Massif (Variscan Belt of Central Europe). The presence of coesite inclusions in garnet and omphacite confirms that these eclogites underwent ultrahigh‐pressure metamorphism.
Małgorzata Nowak, Lucie Tajčmanová, Marcin Dąbrowski, Iris Buisman, Jacek Szczepański   +4 more
wiley   +1 more source

P-T evolution of Glenelg eclogites, NW Scotland: Did they experience ultrahigh-pressure metamorphism?

, 2010
Eclogites and their retrogressed equivalents from the eastern unit of the Glenelg-Attadale Inlier in NW Scotland preserve much microstructural evidence that indicates that very high-pressure/temperature eclogite facies conditions were reached, and ...
Windley, Brian F, Sajeev, Krishnan, Maruyama, Shigenori, Kawai, Takahiro, Omori, Soichi   +4 more
core  

Tethyan and Indian subduction viewed from the Himalayan high- to ultrahigh-pressure metamorphic rocks

, 2008
International audienceThe Himalayan range is one of the best documented continent-collisional belts and provides a natural laboratory for studying subduction processes.
Pecher, Arnaud, Mahéo, Gweltaz, Hattori, Keiko, Guillot, Stephane, de Sigoyer, Julia   +4 more
core   +1 more source

Petrological and geochemical characteristics of the Quartzite-type crystalline graphite deposit, East China: implication for graphite genesis

Open Geosciences
The Quartzite-type crystalline graphite deposit of East China, which is developed in the South Sulu ultrahigh-pressure (UHP) metamorphic belt, represents a medium-sized crystalline graphite deposit.
Zhang Yangyang, Rao Wenbo, Liu Feng, Yao Weijun, Shi Lin, Xu Ziling, Mao Changping   +6 more
doaj   +1 more source

Prolonged super-orogens during Gondwana assembly contributed to the formation of a habitable Earth: Insights from big data

China Geology
Since the initiation of plate tectonics on Earth, the evolution of tectonic regime and supercontinent cycles (Nuna, Rodinia and Pangea) have been the first order factors that contributed to Earth surficial environmental changes and thus development of ...
Peng-yuan Cui, Jin-long Yao, Guo-chun Zhao, Yi-gui Han, Qian Liu, Dong-hai Zhang, Hang Yang   +6 more
doaj   +1 more source

Fluid‐Driven Mass Transfer During Retrograde Metamorphism and Exhumation of the UHP Western Gneiss Region Terrane, Norway

Geochemistry, Geophysics, Geosystems
Dehydration reactions within subducted oceanic crust are important for fluid‐mediated element transfer within the subducting plate and potentially to the mantle wedge.
D. Z. Shulaker, S. M. Gordon, J. Hammerli, J. W. DesOrmeau   +3 more
doaj   +1 more source

Magnetic properties of ultrahigh-pressure eclogites controlled by retrograde metamorphism: a case study from the ZK703 drillhole in Donghai, eastern China

, 2007
Parallel studies on rock magnetic properties, petrology and mineralogy were conducted on 16 eclogite samples from the ZK703 hole and magnetic susceptibilities and densities of 41 eclogite samples with different degree of retrograde metamorphism (from ...
Liu, Q-S., Xu, H.J., Chan, L.S., Chan, L, Liu, Q.S., Liu, Q, Jin, Z.M., Zhang, Z, Yang, T, Yang, T., Jin, Z, Zhang, Z.M., Xu, H   +12 more
core   +1 more source