Results 31 to 40 of about 21,763 (249)

U–Pb dating and Sm–Nd isotopic analysis of granitic rocks from the Tiris Complex : new constaints on key events in the evolution of the Reguibat Shield, Mauritania [PDF]

, 2012
The Reguibat Shield of N Mauritania and W Algeria represents the northern exposure of the West African Craton. As with its counterpart in equatorial West Africa, the Leo Shield, it comprises a western Archaean Domain and an eastern Palaeoproterozoic ...
Abdouloye, T.B., Darbyshire, F., Gillespie, M., Horstwood, M.S.A., O'Connor, E.A., Pitfield, P.E.J., Schofield, D.I.   +6 more
core   +1 more source

Two pulse intrusive events of the Pliocene Tanigawa-dake granites revealed from zircon U–Pb dating

Earth, Planets and Space, 2021
We performed zircon U–Pb dating on the Pliocene Tanigawa-dake granites (Makihata and Tanigawa bodies) and the Cretaceous Minakami quartzdiorite, Northeast Japan Arc.
Saki Minami, Mitsuhiro Nagata, Shigeru Sueoka, Shoma Fukuda, Yuya Kajita, Yasuhiro Ogita, Saya Kagami, Tatsunori Yokoyama, Takahiro Tagami   +8 more
doaj   +1 more source

Magmatic record of India-Asia collision [PDF]

, 2015
This work was financially co-supported by Chinese Academy of Sciences (XDB03010301) and other Chinese funding agencies (Project 973: 2011CB403102 and 2015CB452604; NSFC projects: 41225006, 41273044, and 41472061).New geochronological and geochemical data
Cawood, Peter Anthony, Chung, Sun-Lin, Liu, Sheng-Ao, Mo, Xuan-Xue, Niu, Yaoling, Wang, Qing, Wu, Fu-Yuan, Zhao, Zhi-Dan, Zhu, Di-Cheng   +8 more
core   +1 more source

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source

When do we need pan-global freeze to explain ^(18)O-depleted zircons and rocks? [PDF]

, 2011
Rocks with δ^(18)O values of less than 5‰ SMOW (Standard Mean Ocean Water) contain oxygen derived from ∼0‰ seawater or meteoric (rain or melted snow,
Bindeman, Ilya
core   +1 more source

Archived U-Pb (zircon) dates from southern New Brunswick

Atlantic Geology, 2003
U-Pb (zircon) ages for eight samples from southern New Brunswick were determined during the early 1990's as part of a regional mapping and correlation program. Although most of the dates have been subsequently quoted in the literature through personal communications, and some preliminary isochron diagrams have been incorporated in papers, the results ...
Malcolm J. McLeod, Susan C. Johnson, Tom E. Krogh   +2 more
openaire   +2 more sources

Hf isotopic compositions of the standard zircons for U-Pb dating

Chinese Science Bulletin, 2004
Using the newly published Yb isotopic abundances and the mass bias relationship between Yb and Hf, we carried out an analysis of Hf isotopes in the standard zircon 91500 by means of 193 nm laser attached to Neptune multi-collector ICP-MS (LA-MC-ICPMS).
Ping Xu, Fuyuan Wu, Liewen Xie, Yueheng Yang   +3 more
openaire   +2 more sources

Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]

, 2016
An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio, Baldo, Edgardo Gaspar Agustín, Basei, Miguel A. S., da Costa Campos Neto, Mario, Dahlquist, Juan Andrés, Rapela, Carlos Washington, Uran, Gimena Mariel, Verdecchia, Sebastián Osvaldo, Zandomeni, Priscila Soledad   +8 more
core   +2 more sources

Zircon ages in granulite facies rocks: decoupling from geochemistry above 850 °C? [PDF]

, 2018
Granulite facies rocks frequently show a large spread in their zircon ages, the interpretation of which raises questions: Has the isotopic system been disturbed? By what process(es) and conditions did the alteration occur?
A Boriani, A Boriani, A Henk, A Langone, A Mulch, A Mulch, A Möller, A Zanetti, A Zingg, A Zingg, A-M Seydoux-Guillaume, AE Hofmann, B Bingen, B Schnetger, Barbara E. Kunz, BE Kunz, BE Kunz, C Annen, C Paton, C Paton, C Redler, C Redler, C Yakymchuk, CR McFarlane, CR McFarlane, D Regis, D Rubatto, D Rubatto, D Rubatto, D Rubatto, D Rubatto, Daniele Regis, DE Kelsey, DE Kelsey, DJ Cherniak, DJ Cherniak, DM Fountain, DM Fountain, E Rutter, EB Watson, EB Watson, EM Peterman, F Corfu, F Tomaschek, FJ Korhonen, G Bigi, G Fraser, G Peressini, G Rivalenti, G Rivalenti, G Vavra, G Vavra, GL Luvizotto, H Berckhemer, H Degeling, H Voshage, IS Williams, IS Williams, J Hermann, J Pape, J Sláma, JA Baldwin, JA Petrus, JE Quick, JE Quick, JF Diener, JW Valley, K Mezger, KR Mehnert, L Nasdala, L Nasdala, L Schiøtte, M Bertolani, M Bertolani, M Guillong, M Kohn, M Tichomirowa, MA Kusiak, MA Kusiak, Martin Engi, MJ Whitehouse, MP Roberts, MR Handy, MR Handy, NE Timms, NE Timms, NJ Pearce, NM Kelly, P Monjoie, P Vonlanthen, PW Hoskin, PW Hoskin, PW Hoskin, R Schuster, RC Ewing, RJ Taylor, RM Flowers, RT Pidgeon, S Barboza, S Barboza, S Bodorkos, S Capedri, S Piazolo, S Sinigoi, S Sinigoi, S Sinigoi, SE Jackson, SH Vorhies, SL Harley, SM Reddy, SM Schmid, SM Schmid, T Geisler, T Geisler, TA Ewing, U Schaltegger, U Schaltegger, U Schaltegger, U Schaltegger, US Klötzli, WF McDonough   +120 more
core   +1 more source

Nature and timing of Late Mississippian to Mid-Pennsylvanian glacio-eustatic sea-level changes of the Pennine Basin, UK [PDF]

, 2012
The Pennine Basin of northern England contains a comparatively complete Serpukhovian– Moscovian succession characterized by high-resolution ammonoid zonation and cyclic paralic sedimentation.
Condon, Daniel J., Waters, Colin N.
core   +2 more sources