Results 41 to 50 of about 1,181 (167)

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

Evolution of Siderian juvenile crust to Rhyacian high Ba-Sr magmatism in the Mineiro Belt, southern São Francisco Craton [PDF]

, 2018
Plutonic rocks from the Mineiro Belt, Brazil record a delayed onset of the transition from TTG to sanukitoid-type magmatism (high Ba-Sr), starting during the Siderian magmatic lull when little juvenile magma was added to the continental crust.
Fowler, Mike, Lana, Cristiano, Lasalle, Stephanie, Moreira, Hugo, Seixas, Luís, Stevenson, Ross, Storey, Craig   +6 more
core   +2 more sources

Chemical abrasion applied to LA-ICP-MS U-Pb zircon geochronology [PDF]

, 2014
Zircon (ZrSiO4) is the most commonly used mineral in U-Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of age determinations.
Benn, Keith, Chew, David, Crowley, Quentin G., Heron, Kyle, Kamber, Balz, McConnell, Brian, Riggs, Nancy Rosalind   +6 more
core   +2 more sources

Rb-Sr and in situ 40Ar/39Ar dating of exhumation-related shearing and fluid-induced recrystallization in the Sesia zone (Western Alps, Italy) [PDF]

, 2018
The Sesia zone in the Italian Western Alps is a piece of continental crust that has been subducted to eclogite-facies conditions and records a complex metamorphic history.
Glodny, J, Halama, R, Konrad-Schmolke, M, Sudo, M   +3 more
core   +2 more sources

Assembly of the Lhasa and Qiangtang terranes in central Tibet by divergent double subduction [PDF]

, 2015
This research was financially co-supported by the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB03010301), the National Key Project for Basic Research of China (2011CB403102 and 2015CB452604), the Chinese National Natural
Cawood, Peter A., Li, Shi-Min, Liu, Sheng-Ao, Wang, Li-Quan, Wang, Qing, Zhao, Zhi-Dan, Zhu, Di-Cheng   +6 more
core   +1 more source

Origin and evolution of the Variscan Léon eclogites: insights from zircon and garnet petrochronology [PDF]

European Journal of Mineralogy
Eclogites record the deep burial and exhumation of crustal terranes, which are key tectonic markers in the evolution of orogenic belts. Unraveling the evolution of eclogites and eclogite-bearing terranes may nevertheless be challenging, especially in old
L. Tual, C. Authemayou, C. Lotout, C. Lotout, M. A. Smit, M. A. Smit, K. Musiyachenko, D. Bussien Grosjean, E. Kooijman, E. Bruand   +9 more
doaj   +1 more source

Geochronological challenges posed by continuously developing tectonometamorphic systems: insights from Rb–Sr mica ages from the Cycladic Blueschist Belt, Syros (Greece). [PDF]

, 2016
Is metamorphism and its causative tectonics best viewed as a series of punctuated events or as a continuum? This question is addressed through examination of the timing of exhumation of the Cycladic Blueschist Belt (CBB).
Bond, CE, Butler, RWH, Cliff, RA, Dixon, JE   +3 more
core   +1 more source

Indentation of the Pamirs with respect to the northern margin of Tibet: constraints from the Tarim basin sedimentary record [PDF]

, 2016
The Pamirs represent the indented westward continuation of the northern margin of the Tibetan Plateau, dividing the Tarim and Tajik basins. Their evolution may be a key factor influencing aridification of the Asian interior, yet the tectonics of the ...
Ando, S., Blayney, T., Carter, Andrew, Dupont-Nivet, G., Garzanti, E., Guo, Z., Miller, I., Najman, Y., Rittner, M., Sobel, E., Vezzoli, G.   +10 more
core   +3 more sources

Late Neogene tectonically driven crustal exhumation of the Sikkim Himalaya : Insights from inversion of multithermochronologic data [PDF]

, 2016
Apatite fission track and zircon (U-Th)/He data are reported for 34 bedrock samples distributed between the foothills and the topographic crest of the Darjeeling-Sikkim Himalaya.
Coutand, Isabelle, Grujic, Djordje, Hourigan, Jeremy K., Landry, Kyle R., Whipp, David M.   +4 more
core   +1 more source

Paleoproterozoic Reworking of Archean Crust and Extreme Back‐Arc Metamorphism in the Enigmatic Southern Trans‐Hudson Orogen

Geophysical Research Letters
The crustal evolution of the southernmost ∼2000–1800 Ma Trans‐Hudson orogen (THO) is enigmatic due to burial by Phanerozoic sediments. We provide new insights through petrochronologic analysis of a paragneiss drill core sample.
Ian W. Hillenbrand, Amy K. Gilmer, Michael L. Williams, A. Kate Souders, Michael J. Jercinovic, Heather A. Lowers, Jorge A. Vazquez   +6 more
doaj   +1 more source