Results 101 to 110 of about 138,394 (310)

U-Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina) : correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane [PDF]

, 2006
The Sierras Pampeanas of Argentina, the largest outcrop of pre-Andean crystalline basement in southern South America, resulted from plate interactions along the proto-Andean margin of Gondwana, from as early as Mesoproterozoic to Late Paleozoic times (e ...
C. Mark Fanning, Carlos W. Rapela, Carmen Galindo, Casquet, Casquet, Cesar Casquet, Corrievau, Damm, Edgardo Baldo, Galindo, Jose M. González-Casado, Juan A. Dahlquist, Kretz, Loewy, Martignole, McDonough, Pankhurst, Porcher, Powell, Ramos, Ramos, Ramos, Rapela, Rapela, Rivers, Robert J. Pankhurst, Thomas, Tosdal, Varela, Vavra, Vujovich, Wasteneys   +31 more
core   +4 more sources

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +1 more source

Behavior and Impact of Zirconium in the Soil–Plant System: Plant Uptake and Phytotoxicity [PDF]

, 2013
Because of the large number of sites they pollute, toxic metals that contaminate terrestrial ecosystems are increasingly of environmental and sanitary concern (Uzu et al. 2010, 2011; Shahid et al. 2011a, b, 2012a).
A Clearfield, A Kabata-Pendias, A Kabata-Pendias, A Kamal, A Martínez Cortizas, A Mushtaq, A Panahi, A Sako, AA Calagari, AC Kurtz, AJM Baker, AM Hirsch, B Dupré, B Pourrut, BN Ryzhenko, C Dumat, C Ekberg, C Lomonte, C Zaccone, CA Stiles, CB Brun, CF Baes, CJ Whitfield, CR Bern, D Gagnevin, D Langmuir, D Mou, DC Bain, DER Meyers, DI Sanzharova, DK Gupta, DL Jones, DR Muhs, DR Muhs, E Caffau, E Ferrand, E Maestri, EA Belousova, EA Belousova, F Zeng, F-L Wu, FA Cotton, FA Vega, FJ Pettijohn, FP Venable, FV Tome, FW Whicker, G Uzu, G Uzu, G Uzu, G Zaraisky, G Zaraisky, GES Maria, GW Garnham, H Bowen, HF Wang, HH LeRiche, I Pais, I Pais, I Valeton, I Verel, IC Smith, J Dessureault-Rompré, J Kumpiene, J Ribeiroa, J Viers, J-C Aznar, J-F Peng, J-J Braun, J-L Feng, J-L Feng, JB Thomas, JC Chow, JJ Shi, JJ Shi, JJ Shi, JJ Shi, JN Rubin, K Benekos, K Quenea, L Duvallet, L Lowery Claiborne, L Lyubenova, L Patino, LM Mosulishvili, LY Alleman, M Arshad, M Carvajal, M Egli, M Fodor, M Fodor, M Hodson, M Krzeslowska, M Krzeslowska, M Malandrino, M Patra, M Shahid, M Shahid, M Shahid, M Shahid, M Sommer, M Udovic, MAH Bhuiyan, ME Saifullah, MG Little, MI Qureshi, MJK Flohr, ML Sammut, MS Tejan-Kella, MWH Evangelou, N Mirza, N Rascio, N Senesi, N Stojilovic, N Verbruggen, NI Kovalenko, NI Prisyagina, O Abollino, O Pokrovsky, OA Chadwick, OJ Owojori, P Couture, P Grover, P Hinsinger, P Hinsinger, P Tematio, PM Kopittke, PM Kopittke, PWO Hoskin, Q Hao, R Bali, R Naudet, R Sandoval, R Schulin, RV Davis, S Ali, S Cornu, S Ghosh, S Jung, SJ Hill, SK Yadav, SP Anderson, SS Goldich, SU Aja, SV Kruglov, T Caspari, T Horvath, T Pettke, TCM Yip, TL Yau, TM Vadas, V Chaignon, V Gundersen, VB Che, VJ Oliva, VM Klechkovsky, W Jiang, WB Blumental, WB Blumenthal, X Bi, X Dou, X Liu, X Wang, Y Wu, YC Liao, YP Davydov, YP Yirchenko, Z Zou, ZMH Saifullah, ZZ Yan   +169 more
core   +3 more sources

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +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

Assessment of impact of a control die on marginal fidelity of milled zirconia crown copings for finishing and polishing

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study evaluated and compared the marginal fidelity of milled zirconia copings before and after finishing and polishing with and without a control die. Materials and Methods This prospective multicenter in vitro trial involved two methods regularly used in two clinics for hybrid and full‐digital workflows.
Marwan Al Akkad, John Sorensen, Omar Hamadah, Iva Voborna, Marek Matoušek, Radek Mounajjed   +5 more
wiley   +1 more source

A stochastic sampling approach to zircon eruption age interpretation

Geochemical Perspectives Letters, 2018
The accessory mineral zircon is widely used to constrain the timing of igneous processes such as magma crystallization or eruption. However, zircon U-Pb ages record zircon crystallization, which is not an instantaneous process.
C. B. Keller, B. Schoene, K. M. Samperton   +2 more
semanticscholar   +1 more source

Garnet–monazite rare earth element relationships in sub-solidus metapelites: a case study from Bhutan [PDF]

, 2018
A key aim of modern metamorphic geochronology is to constrain precise and accurate rates and timescales of tectonic processes. One promising approach in amphibolite and granulite-facies rocks links the geochronological information recorded in zoned ...
Argles, Tom W., Greenwood, Lucy V., Harris, Nigel B. W., Parrish, Randall R., Roberts, Nick M. W., Warren, Clare J.   +5 more
core   +9 more sources

Surface roughness, stainability, and translucency of an additively manufactured interim resin reinforced with a commercially available ceramic composite concentrate after coffee thermal cycling

Journal of Prosthodontics, EarlyView.
Abstract Purpose To compare the surface roughness (Ra), stainability, and translucency of a ceramic composite concentrate‐reinforced interim resin with its corresponding non‐reinforced formulation and with a ceramic‐filled resin indicated for definitive use after coffee thermal cycling.
Mustafa Borga Donmez, Nicolas Michel Rotter, Gabriela Panca Sabatini, Almira Ada Diken Türksayar, Hyung‐In Yoon, Burak Yilmaz   +5 more
wiley   +1 more source

The 'granite encapsulation' route to the safe disposal of Pu and other actinide [PDF]

, 2008
Waste actinides, including plutonium, present a long-term management problem and a serious security issue. Immobilisation in mineral or ceramic waste forms for interim storage is a widely proposed first step.
Burakov, B.E., Gibb, F.G.F., Taylor, K.J.   +2 more
core   +1 more source