Results 61 to 70 of about 7,236 (215)
Anais da Academia Brasileira de Ciências, 2008 U-Pb dating of zircon was undertaken with the Beijing SHRIMP II (sensitive high resolution ion microprobe) on anamphibolite facies granodiorite and an almandine-albite granulite from the Santa Maria Chico Granulitic Complex, southern Brazilian Shield ...
Léo A. Hartmann +4 more
doaj +1 more source
SHRIMP U-Pb Zircon Geochronology and Geochemistry of Drill Cores from the Pohang Basin
The Journal of the Petrological Society of Korea, 2014 SHRIMP zircon U-Pb ages and major element and Sr-Nd isotopic compositions were determined for drill cores (374-3390 m in depth) recovered from three boreholes in the Pohonag basin, southeastern Korea. Shallow-seated volcanic rocks and underlain plutonic rocks were geochemically classified as rhyolite and gabbro-granite, respectively. They showed high-K
Tae-Ho Lee +5 more
openaire +2 more sources
Assessing Pb Isotopic Equilibrium Between Apatite and K‐Feldspar
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.Abstract Quantifying common Pb, the non‐radiogenic Pb present in a mineral independent of in situ U decay, is essential for obtaining accurate U–Pb ages in common Pb‐bearing minerals such as apatite. However, constraining the amount and composition of common Pb, as well as the timing of its entrapment, remains a persistent challenge.
Priyanjan Datta +3 more
wiley +1 more source
Journal of Metamorphic Geology, Volume 44, Issue 1, Page 20-46, January 2026.ABSTRACT Elevated heat flow associated with mafic magmatism in accretionary orogens has often been proposed as a driving mechanism for (ultra)high‐temperature (UHT) metamorphism and anatexis. The Sancheong–Hadong complex, located in the southern Yeongnam Massif, Korea, consists of a ca.
Yuyoung Lee +3 more
wiley +1 more source
Journal of Metamorphic Geology, Volume 43, Issue 9, Page 863-890, December 2025.ABSTRACT Orogenic belts that sustain elevated temperatures at intermediate crustal depths for tens of millions of years are known as hot orogens. The evolution of these hot orogens is largely influenced by thermal maturation, primarily driven by the distribution of heat‐producing elements (HPEs), such as K, Th and U in the overthickened crust.
Lucas R. Schiavetti +6 more
wiley +1 more source
Supporting info item, In: "Using SHRIMP zircon dating to unravel tectonothermal events in arc environments. The early Palaeozoic arc of NW Iberia revisited" [PDF]
, 2007 Dating of zircon cores and rims from granulites developed in a shear zone provides insights into the complex relationship between magmatism and metamorphism in the deep roots of arc environments.
Abati Gómez, Jacobo +5 more
core +3 more sources
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.Abstract The Lepontine dome (European Central Alps) is constituted by basement nappes under Alpine regional Barrovian metamorphism, yet the duration and pattern of its post‐peak amphibolite‐facies cooling remain uncertain. We examine garnet‐rim compositional re‐adjustment and employ inverse multicomponent diffusion modeling to estimate apparent cooling
A. Tagliaferri +3 more
wiley +1 more source
Precise U-Pb zircon ages and geochemistry of Jurassic granites, Ellsworth-Whitmore terrane, central Antarctica [PDF]
, 2016 The Ellsworth-Whitmore Mountain terrane of central Antarctica was part of the early Paleozoic amalgamation of Gondwana, including a 13,000 m section of Cambrian–Permian sediments in the Ellsworth Mountains deposited on Grenville-age crust.
Craddock, John P. +7 more
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.Abstract The drift history of the Tethyan Himalaya provides key constraints on the India‐Asia collision, Himalayan‐Tibetan orogenesis, and associated global climate change. Here we present rock magnetic, petrographic, geochronologic, and paleomagnetic results of the Bolinxiala Formation limestones in the western Tethyan Himalaya.
Siqi Wang +12 more
wiley +1 more source
New U-Pb zircon ages of El Baúl Massif, Cojedes State, Venezuela.
Revista Técnica de la Facultad de Ingeniería, 2010 El Baúl massif (Cojedes State, Venezuela) has been studied since 1858, especially as an important target for oil companies since it is a structural high that has played an important role in the evolution of the oil bearing Barinas-Apure and Eastern ...
Patxi Viscarret +2 more
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