Results 1 to 10 of about 3,078 (99)

Secular change of tectonic setting in the Archean Takanen greenstone belt, northeastern Karelia Province, Fennoscandian Shield [PDF]

Bulletin of the Geological Society of Finland, 2023
The target of this study is the Takanen greenstone belt (TGB), a small 11-km-long and east-west oriented supracrustal belt in the northern Lentua complex of the Western Karelia Subprovince (eastern Finland).
Ville Järvinen, Nikolaos Karampelas, Tapani Rämö, Tapio Halkoaho, Tuomo Törmänen, Perttu Mikkola, Yann Lahaye   +6 more
doaj   +1 more source

Some new insights into the geochronology of the Western Karelia Subprovince, Finnish Lapland [PDF]

Bulletin of the Geological Society of Finland, 2020
Archean terranes are generally poorly exposed and structurally complicated, making models of geological evolution difficult to establish. Because of pervasive metamorphism, strong deformation, and poorly exposed bedrock, the stratigraphy, geochronology ...
Johanna Tepsell, O. Tapani Rämö, Aku Heinonen, Yann Lahaye, Pieti Haapala, Tapio Halkoaho, Jussi S. Heinonen, Henri Höytiä, Jukka Konnunaho, Ville Järvinen   +9 more
doaj   +1 more source

Technical note: LA–ICP-MS U–Pb dating of unetched and etched apatites [PDF]

Geochronology, 2021
The same unetched and chemically etched apatite crystals from five rock samples were dated by the U–Pb method via laser ablation inductively coupled plasma mass spectrometry (LA–ICP-MS).
F. Abdullin, L. A. Solari, J. Solé, C. Ortega-Obregón   +3 more
doaj   +1 more source

Direct Calibration Method for LA-HR-ICP-MS Apatite U-Pb Dating

Yankuang ceshi, 2022
BACKGROUND Apatite is a common U-bearing accessory mineral with a U-Pb closure temperature of ~500℃, making U-Pb dating of apatite a potentially valuable thermochronometer.
ZHAO Linghao, ZHAN Xiuchun, ZENG Lingsen, HU Mingyue, SUN Dongyang, YUAN Jihai   +5 more
doaj   +1 more source

Apatite U-Pb Thermochronology: A Review [PDF]

Minerals, 2021
The temperature sensitivity of the U-Pb apatite system (350–570 °C) makes it a powerful tool to study thermal histories in the deeper crust. Recent studies have exploited diffusive Pb loss from apatite crystals to generate t-T paths between ~350–570 °C, by comparing apatite U-Pb ID-TIMS (isotope dilution-thermal ionisation mass spectrometry) dates with
David M. Chew, Richard A. Spikings
openaire   +1 more source

Dinamika nakupljanja olova u listu i dijelovima ploda bajama

Poljoprivreda, 2023
Plodovi bajama (jezgra) smatraju se diljem svijeta zdravom hranom jer osim svoje visoke nutritivne vrijednosti u povećanim koncentracijama sadrže i esencijalne bio-molekule, koje pozitivno djeluju na ljudski metabolizam i istodobno preveniraju najvažnije
Anđelko Vrsaljko
doaj   +1 more source

Establishing Provenance from Highly Impoverished Heavy Mineral Suites: Detrital Apatite and Zircon Geochronology of Central North Sea Triassic Sandstones

Geosciences, 2022
A study of Triassic sandstones in the central North Sea, UK, has shown that combined detrital zircon and apatite geochronology and apatite trace element analysis is a powerful tool for reconstructing provenance for sandstones with diagenetically ...
Iain P. Greig, Andrew Morton, Dirk Frei, Adrian Hartley   +3 more
doaj   +1 more source

U-Pb memory behavior in Chicxulub's peak ring — Applying U-Pb depth profiling to shocked zircon [PDF]

Chemical Geology, 2019
The zircon U-Pb system is one of the most robust geochronometers, but during an impact event individual crystals can be affected differently by the passage of the shock wave and impact generated heat. Unraveling the potentially complex thermal history recorded by zircon crystals that experienced variable levels of shock and heating, as well as ...
Rasmussen, Cornelia, Stockli, Daniel, Ross, Catherine, Pickersgill, Annemarie, Gulick, Sean, Schmieder, Martin, Christeson, Gail, Wittmann, Axel, Kring, David, Morgan, Joanna, J. Bralower, Timothy, Claeys, Philippe, Cockell, Charles S., Coolen, Marco J.L., Ferrière, Ludovic, Gebhardt, Catalina, Goto, Kazuhisa, Green, Sophie, Jones, Heather, Leber, Erwan, Lofi, Johanna, Lowery, Christopher M., Ocampo-Torres, Ruben, Perez-Cruz, Ligia, Poelchau, Michael H., Rae, Auriol S.P., Rebolledo-Vieyra, Mario, Riller, Ulrich, Sato, Honami, Smit, Jan, Tikoo-Schantz, Sonia M., Tomioka, Naotaka, Urrutia-Fucugauchi, Jaimie, Whalen, Michael T., Long, Xiao, Yamaguchi, Kosei E.   +35 more
openaire   +2 more sources

Towards in situ U–Pb dating of dolomite [PDF]

Geochronology, 2020
Abstract. Recent U–Pb dating by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has demonstrated that reasonable precision (3 %–10 %, 2σ) can be achieved for high-resolution dating of texturally distinct calcite phases. Absolute dating of dolomite, for which biostratigraphy and traditional dating techniques are very limited ...
B. Elisha, B. Elisha, P. Nuriel, A. Kylander-Clark, R. Weinberger, R. Weinberger   +5 more
openaire   +3 more sources

Dating minerals by ID-TIMS geochronology at times of in situ analysis: selected case studies from the CPGeo-IGc-USP laboratory

Anais da Academia Brasileira de Ciências, 2009
Since 1964, the Center for Geochronological Research - CPGeo, one of the interdepartmental centers of the Instituto de Geociências (IG) of São Paulo University, has developed studies related to several geological processes associated with different rock ...
Cláudia R. Passarelli, Miguel A.S. Basei, Oswaldo Siga Jr., Kei Sato, Walter M. Sproesser, Vasco A.P. Loios   +5 more
doaj   +1 more source