Results 51 to 60 of about 82,926 (239)

Multianalytical provenance analysis of Eastern Ross Sea LGM till sediments (Antarctica): Petrography, geochronology, and thermochronology detrital data [PDF]

, 2017
In order to reveal provenance of detrital sediments supplied by West Antarctic Ice Sheet (WAIS), 19 glaciomarine cores of Last Glacial Maximum age were analyzed from Eastern Ross Sea and Sulzberger Bay.
Andreucci, Benedetta, Langone, Antonio, Perotti, Matteo, Talarico, Franco, Zattin, Massimiliano   +4 more
core   +2 more sources

µID-TIMS: spatially resolved high-precision U–Pb zircon geochronology [PDF]

Geochronology
We present a novel methodology for spatially resolved high-precision U–Pb geochronology of individual growth domains in complex zircon. Our approach utilizes a multi-ion-species (Xe+/Ar+) plasma focused ion beam (PFIB)–femtosecond (fs) laser system ...
S. Markovic, J.-F. Wotzlaw, D. Szymanowski, J. Reuteler, P. Zeng, C. Chelle-Michou   +5 more
doaj   +1 more source

Mesozoic Paleo-Pacific Subduction Beneath SW Borneo: U-Pb Geochronology of the Schwaner Granitoids and the Pinoh Metamorphic Group

Frontiers in Earth Science, 2020
The Schwaner Mountains in southwestern Borneo form a large igneous province with a complex magmatic history and poorly known tectonic history. Previously it was known that Cretaceous granitoids intruded metamorphic rocks of the Pinoh Metamorphic Group ...
H. T. Breitfeld, L. Davies, R. Hall, R. Armstrong, M. Forster, G. Lister, M. Thirlwall, N. Grassineau, Juliane Hennig-Breitfeld, M. W. van Hattum   +9 more
semanticscholar   +1 more source

Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]

, 2010
The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M., Fanning, C.M., Herve, F., Klepeis, K., Mpodozis, C., Pankhurst, R.J., Thomson, S.N.   +6 more
core   +1 more source

Impacts of Common Lead on Apatite U-Pb Geochronology by LA-ICP-MS: Assessment and Correction Strategies

Yankuang ceshi
Apatite is a widespread U-bearing mineral in igneous, metamorphic, and sedimentary rocks. U-Pb geochronology of apatite can provide significant information for constraining magmatic evolution processes and tracing provenance.
Tao LUO, Hanlin WANG, Songbai ZHU, Liyuan QING, Zhaochu HU   +4 more
doaj   +1 more source

Quaternary caldera-forming eruptions at the Sanzugawa caldera, NE Japan, revealed by zircon U-Pb geochronology

Frontiers in Earth Science, 2023
Recent application of zircon U-Pb geochronology has contributed to deciphering the evolution of caldera systems worldwide. However, in the Tohoku region, NE Japan, this is not the case, although it is well studied as a typical island arc subduction ...
Hisatoshi Ito
doaj   +1 more source

Deeply subducted continental fragments - Part 2: Insight from petrochronology in the central Sesia Zone (western Italian Alps) [PDF]

, 2018
Subducted continental terranes commonly comprise an assembly of subunits that reflect the different tectono-metamorphic histories they experienced in the subduction zone.
Burn, Marco, Engi, Martin, Giuntoli, Francesco, Kunz, Barbara Eva, Lanari, Pierre   +4 more
core   +3 more sources

Neoarchean Arc Magmatism and Crust Recycling in the Northern Marginal Zone of the Limpopo Complex, Zimbabwe: New Insights From Zircon U‐Pb‐Hf Isotopes of a Charnockite Suite

Geological Journal, EarlyView.
Charnockites with 2691–2607 Ma magmatic ages from the NMZ show arc‐magmatic geochemical signatures. They correspond to the lower‐crustal equivalent of the Chilimanzi Suite Granite in the Zimbabwe Craton. Lu‐Hf isotopic data of magmatic zircons show negative εHf(t) values (−11.18 to −2.20) with TDMC ages of 3699–3158 Ma, suggesting their protolith ...
Toshiaki Tsunogae, Md. Sazzadur Rahman, Gao Pin, M. Santosh, Wataru Fujisaki, Sam Uthup, Prince Mandingaisa   +6 more
wiley   +1 more source

U redox state tracked in mineralized hydrothermal carbonate with implications for U-Pb geochronology

Communications Earth & Environment
U-Pb carbonate geochronology can directly constrain the timing and rates of important geological processes. However, the mechanisms and controls on U incorporation, distribution, and retention in carbonate minerals remain unclear, limiting geological ...
Sarah Bowie, Catherine Mottram, E. Troy Rasbury, Paul Northrup, Ryan Tappero, Dawn Kellett   +5 more
doaj   +1 more source

Zircon micro-inclusions as an obstacle for in situ garnet U–Pb geochronology: an example from the As Sifah eclogite locality, Oman [PDF]

Geochronology
Garnet is commonly used to calculate pressure (P)–temperature (T) histories of metamorphic rocks, as well as to monitor changes in bulk-rock composition (X) and deformation (d).
J. B. Walters, J. B. Walters, J. B. Walters, J. M. Garber, A. Beranoaguirre, A. Beranoaguirre, L. J. Millonig, L. J. Millonig, A. Gerdes, A. Gerdes, T. Grützner, T. Grützner, H. R. Marschall, H. R. Marschall   +13 more
doaj   +1 more source