Results 41 to 50 of about 8,669 (230)

40Ar/39Ar Thermochronology for Submilligram Samples Using a Ta Platform Microfurnace, With Illustrations From the Bushveld Complex

Geochemistry, Geophysics, Geosystems, 2020
We present a method for 40Ar/39Ar step‐heating measurements on anhydrous K‐bearing minerals. Samples placed in dimples on Ta foil platforms are heated indirectly with a laser while temperatures are measured with a two‐color pyrometer. The system provides
Jacob B. Setera, Brent D. Turrin, Gregory F. Herzog, Jill A. VanTongeren, Jeremy S. Delaney, Carl C. Swisher III   +5 more
doaj   +1 more source

Multianalytical provenance analysis of Eastern Ross Sea LGM till sediments (Antarctica): Petrography, geochronology, and thermochronology detrital data [PDF]

, 2017
In order to reveal provenance of detrital sediments supplied by West Antarctic Ice Sheet (WAIS), 19 glaciomarine cores of Last Glacial Maximum age were analyzed from Eastern Ross Sea and Sulzberger Bay.
Andreucci, Benedetta, Langone, Antonio, Perotti, Matteo, Talarico, Franco, Zattin, Massimiliano   +4 more
core   +2 more sources

Neon diffusion kinetics and implications for cosmogenic neon paleothermometry in feldspars [PDF]

, 2017
Observations of cosmogenic neon concentrations in feldspars can potentially be used to constrain the surface exposure duration or surface temperature history of geologic samples.
Balco, Greg, Cassata, William S., Shuster, David L., Tremblay, Marissa M.   +3 more
core   +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.
Aciego, Aciego, Aciego, Blackburn, Blondes, Bristow, Dungan, Dungan, Farley, Farley, Flowers, Frances J. Cooper, Gardés, Gautheron, Hon, Hourigan, Jaeger, Kelley, Kip V. Hodges, Lipman, Lipman, Matthijs C. van Soest, McDougall, Min, Nasdala, Reiners, Schildgen, Schildgen, Self, Shuster, Vermeesch, Vermeesch, Wendt   +32 more
core   +2 more sources

T-t Evolution of the Early Proterozoic Rocks in the Northern Ladoga Region from the Data on U-Pb, Rb-Sr and Sm-Nd Systems in Minerals

Геодинамика и тектонофизика
This paper presents the results of a study of isotopic systems in minerals and rocks in southern margin of the epi-Archean Karelian craton in the zone of its junction with the Svecofennian mobile belt.
Sh. K. Baltybaev, V. M. Savatenkov, M. E. Petrakova   +2 more
doaj   +1 more source

Turning the Orogenic Switch: Slab‐Reversal in the Eastern Alps Recorded by Low‐Temperature Thermochronology

Geophysical Research Letters, 2021
Many convergent orogens, such as the eastern European Alps, display an asymmetric doubly vergent wedge geometry. In doubly vergent orogens, deepest exhumation occurs above the retro‐wedge.
Paul R. Eizenhöfer, Christoph Glotzbach, Lukas Büttner, Jonas Kley, Todd A. Ehlers   +4 more
doaj   +1 more source

The North Pyrenean Frontal Thrust: structure, timing and late fluid circulation inferred from seismic and thermal-geochemical analyses of well data

BSGF - Earth Sciences Bulletin, 2021
During orogenesis, large-scale thrusts as orogenic fronts can act as conduits and/or barriers for fluid flow. Unravelling the timing and modes of tectonic activation of large-scale faults is crucial to understanding the relationship between fluid flow ...
Barré Guillaume, Fillon Charlotte, Ducoux Maxime, Mouthereau Frédéric, Gaucher Eric C., Calassou Sylvain   +5 more
doaj   +1 more source

Evidence for surface uplift of the Atlas Mountains and the surrounding peripheral plateaux: Combining apatite fission-track results and geomorphic indicators in the Western Moroccan Meseta (coastal Variscan Paleozoic basement) [PDF]

, 2010
This work represents an initial attempt to link the evolution of the topography in relation to the general tectonic framework of western Morocco. For this purpose, in a section of the Western Moroccan Meseta different tools are combined in order to ...
A. Azdimousa, A. Jabaloy, Ait Brahim, Ayarza, Babault, Barbero, Bargach, Baudin, Braun, Braun, British Oceanographic Data Centre, Burov, Chèvromont, D. Gómez-Ortiz, Davison, El Hadi, Fullea, Fullea-Urchulutegui, Ghorbal, Guiraud, Harmand, Hoepffner, Hurford, Hurtrez, J. Estupiñán, J.V. Pérez-Peña, Johansson, Ketcham, Ketcham, L. Asebriy, L. Barbero, Lifton, M. Vázquez, M.J. Rodríguez-Peces, Mahmood, Masek, Michard, Michard, Michard, Missenard, Mrini, O'Callaghan, Ohmori, Price, Pérez-Peña, Pérez-Peña, R. Tejero, Rayner, Reiners, Schumm, Strahler, Tahiri, Tarboton, Tassi, Teixell, Teixell, Teixell, Tejero, Zeyen   +58 more
core   +2 more sources

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

Geological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Deciphering mantle, tectonic and climatic drivers of exhumation

Communications Earth & Environment
Regional thermochronology provides an important record of crustal exhumation through deep time. However, untangling the myriad of geodynamic, tectonic, climatic and surface processes responsible for long-term upper crustal cooling is often hindered by ...
Samuel C. Boone, Stijn Glorie, Sabin Zahirovic, Angus Nixon, Fun Meeuws, Fabian Kohlmann   +5 more
doaj   +1 more source