Results 61 to 70 of about 4,976,259 (186)

6‐Month Clinical Evaluation of Reduced Dentin Etching Time Using Universal Adhesives in Noncarious Cervical Lesions: A Double‐Blind Randomized Clinical Trial

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To evaluate the effect of reduced dentin etching time on the clinical performance of two universal adhesive systems in noncarious cervical lesions (NCCLs). Methods A total of 144 NCCLs restorations were randomly placed in 36 participants according to four experimental groups: SUP5 (Scotchbond Universal Plus adhesive [pH ≈2.5–2.7 ...
Mario Felipe Gutiérrez, Natalia Amo‐Nicolás, Alondra Beniscelli‐Vásquez, Romina Aliaga‐Gálvez, Alessandro D. Loguercio   +4 more
wiley   +1 more source

K-feldspar sand-grain provenance in the Triassic, west of Shetland : distinguishing first-cycle and recycled sediment sources? [PDF]

, 2009
Sandstone provenance studies can help constrain palaeogeographic reconstructions and ancient drainage system scales and pathways. However, these insights can be obscured by difficulties in geochemically distinguishing or adequately characterising ...
Daly, J. Stephen, Shane Tyrrell, Tyrrell, Shane, Leleu, Sophie, J. Stephen Daly, Souders, A. Kate, Haughton, Peter D. W., Peter D.W. Haughton, Sophie Leleu, A. Kate Souders   +9 more
core   +1 more source

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges, Chris Yakymchuk, Michael P. DiMaio, Timothy C. C. Lui, Anirudh Prabhu, Shaunna M. Morrison   +5 more
wiley   +1 more source

Neoproterozoic to early Paleozoic extensional and compressional history of East Laurentian margin sequences:the Moine Supergroup, Scottish Caledonides [PDF]

, 2014
This work was in part supported by Natural Environment Research Council grant NE/J021822/1, National Science Foundation grant EAR-0087650, and funds from our respective institutions.Neoproterozoic siliciclastic-dominated sequences are widespread along ...
Merle, Renaud, Millar, I.L., Connelly, J.N., Loewy, Staci L., Strachan, R.A., Nemchin, Alexander A., Nemchin, Alexander, Millar, Ian L., Dalziel, I.W., Merle, Renaud E.,, Cawood, Peter A., Loewy, S.L., Merle, Renaud E., Connelly, James N., Dalziel, Ian W.D., Cawood, P., Connelly, James, Jourdan, Fred, Dalziel, Ian W. D., Kinny, Peter, Kinny, Peter D., Strachan, Robin A.   +21 more
core   +1 more source

Description and terrestrial ages of the Calama Area Meteorite Collection (Atacama Desert, Chile)

Meteoritics &Planetary Science, EarlyView.
Abstract We present a comprehensive study of a meteorite collection from the Atacama Desert (Chile), the driest and most climatically stable desert in the world. This collection includes meteorites from three adjacent Dense Collection Areas (DCAs) in the northern part of the Atacama Desert: Calama, Sierra Gorda, and Chug Chug, referred to as the ...
Carine Sadaka, Jérôme Gattacceca, Florian Dumas, Régis Braucher, ASTER Team, Matthieu Gounelle, Dilyara Kuzina, Cyril Lorenz, Alexandre Corgne, Pierre Sempéré   +9 more
wiley   +1 more source

Detrital zircon record and tectonic setting [PDF]

, 2012
Funding: University of St AndrewsDetrital zircon spectra reflect the tectonic setting of the basin in which they are deposited. Convergent plate margins are characterized by a large proportion of zircon ages close to the depositional age of the sediment,
Hawkesworth, Chris, Cawood, Peter Anthony, Hawkesworth, C. J., Dhuime, B., Dhuime, Bruno Philippe Marcel, Cawood, P. A.   +5 more
core   +1 more source

Optimizationof the Working Parameters of LA-ICP-MS and Its Application to Zircon U-Pb Dating

Yankuang ceshi, 2017
Laser Ablation (LA) combined with Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) avoids cumbersome analysis of solution and time-consuming pre process, thus reducing possible pollution during sample preparation.
ZHOU Liang-liang, WEI Jun-qi, WANG Fang, QIU Xiu-mei   +3 more
doaj   +1 more source

Salt Range Formation of Pakistan Preserves Unique Record of Volcanic Fertilization During the Ediacaran Shuram Excursion

Terra Nova, EarlyView.
ABSTRACT Thin, discontinuous, organic‐rich oil shale beds in the siliciclastic‐evaporitic Salt Range Formation (SRF) of Pakistan are of approximate Neoproterozoic to Cambrian age based on stratigraphic constraints. The beds are enriched (26–43 wt.% total organic carbon, TOC) in aliphatic organic matter (OM) of low thermal maturity despite their ...
Paul C. Hackley, Ryan J. McAleer, Jay M. Thompson, Brett J. Valentine, Imran Khan   +4 more
wiley   +1 more source

Detrital zircon and apatite (U‐Th)/He geochronology of intercalated baked sediments: a new approach to dating young basalt flows [PDF]

, 2011
Simple numerical models suggest that many basaltic lava flows should sufficiently heat the sediments beneath them to reset (U‐Th)/He systematics in detrital zircon and apatite.
Frances J. Cooper, Hodges, Kip V, van Soest, Matthijs C, Kip V. Hodges, Cooper, Frances J, Matthijs C. van Soest   +5 more
core   +1 more source

Detrital record of mountain building : Provenance of Jurassic foreland basin to the Dabie Mountains [PDF]

, 2010
The Huangshi foreland basin developed on the southern margin of the Dabie Mountains as a result of tectonic loading during Triassic collisional suturing between the North China and South China cratons.
Jianghai Yang, Cawood, Peter Anthony, Peter A. Cawood, Yuansheng Du, Yang, Jianghai, Du, Yuansheng   +5 more
core   +1 more source