Results 61 to 70 of about 2,471 (181)

A Two-Step K-Ar Experiment on Mars: Dating the Diagenetic Formation of Jarosite from Amazonian Groundwaters [PDF]

, 2017
Following K-Ar dating of a mudstone and a sandstone, a third sample has been dated by the Curiosity rover exploring Gale Crater. The Mojave 2 mudstone, which contains relatively abundant jarosite, yielded a young K-Ar bulk age of 2.57 ± 0.39 Ga (1σ ...
Amirkhanoff, Anderson, Bibring, Bischoff, Bish, Blake, Bogard, Bridges, Bristow, Brophy, Cannon, Cassata, Cassata, Changela, Deer, Dehouck, Dekov, Dutrizac, Dutrizac, Ehlmann, Ehlmann, Evernden, Farley, Fassett, Freissinet, Glavin, Gombosi, Grant, Grotzinger, Grotzinger, Halliday, Hamilton, Hartmann, Hartmann, Hartmann, Hassanipak, Hicks, Humayun, Kula, Lee, Leitner, Lofgren, Madden, Mahaffy, Martín-Torres, McEwen, McEwen, McEwen, McSween, Mees, Ming, Minitti, Morris, Morrison, Nachon, Nachon, Nimmo, Nyquist, Ojha, Ojha, Papike, Rampe, Renne, Renne, Robbins, Schwenzer, Siebach, Singer, Smits, Stack, Sutter, Swindle, Thomson, Treiman, Treiman, Treiman, Vaniman, Vasconcelos, Vasconcelos, Wolff-Boenisch   +79 more
core   +2 more sources

Regional Thermal History Trends From the Idaho‐Montana Fold‐Thrust Belt Using Multiple Low‐T Thermochronometers

Tectonics, Volume 44, Issue 5, May 2025.
Abstract Low‐temperature thermochronometric data can reveal the long‐term evolution of erosion, uplift, and thrusting in fold‐thrust belts. We present results from central Idaho and southwestern Montana, where the close spatial overlap of the Sevier fold‐thrust belt and Laramide style, basement‐involved foreland uplifts signify a complex region with an
J. M. Kaempfer, W. R. Guenthner, D. M. Pearson, D. A. Orme, B. Crawford, D. T. Brennan   +5 more
wiley   +1 more source

Oligocene Slab Break‐Off and Pleistocene Glacial Erosion Shaped the Tectonic Evolution of the Dent Blanche Tectonic System, Western Alps

Tectonics, Volume 44, Issue 5, May 2025.
Abstract Integrating new zircon and apatite (U‐Th‐Sm)/He (ZHe, AHe) and muscovite 40Ar/39Ar (MAr) thermochronometric data with published data sets, we reconstruct the tectonic and thermal evolution of the Dent Blanche Tectonic System (DBTS), an Austroalpine nappe overlain by Ligure‐Piemontese oceanic units in the Western Alps. We report new Late Eocene‐
L. Gemignani, E. R. Sobel, M. Zucali, I. Albino, M. Stellato, J. Glodny, K. Kuiper   +6 more
wiley   +1 more source

Electron Spin Resonance Thermochronometry Indicates Quaternary Activity of the Brenner Fault (Eastern Alps)

Geochemistry, Geophysics, Geosystems
The Brenner Fault is one of the most important normal faults in the Eastern Alps as it accommodates uplift and lateral extrusion of the Tauern Window. Consequently, understanding its kinematic history is important for studying the dynamics of the Eastern
Valentina Argante, Sumiko Tsukamoto, David Colin Tanner, Christoph vonHagke, Christian Brandes, Junjie Zhang, Chloé Bouscary, Christoph Glotzbach   +7 more
doaj   +1 more source

Thermochronometry and palaeomagnetism of the Archaean Nelshoogte Pluton, South Africa [PDF]

Geophysical Journal International, 1998
SUMMARY 207Pb/206Pb single-grain zircon, 40Ar/39Ar single-grain hornblende and biotite, and 40Ar/39Ar bulk-sample muscovite and biotite ages from the Nelshoogte trondhjemite pluton located in eastern Transvaal, South Africa, show that this granitoid had a protracted thermal history spanning 3213±4 Ma to about 3000 Ma.
Paul W. Layer, Margarita Lopez-Martinez, Alfred Kröner, Derek York, Michael McWilliams   +4 more
openaire   +1 more source

Reconciling Geologic and Paleotopographic Constraints on Source‐to‐Sink Sediment Fluxes: An Example From the Bartonian Pyrenees

Basin Research, Volume 37, Issue 3, May/June 2025.
Sediment fluxes are estimated from an Eocene paleoDEM of the Pyrenees using the geomorphic‐climatic BQART equation. These volumes are comparable to sediment supplies independently calculated from bedrock exhumation rates, showing the pDEM generates reliable sediment fluxes.
Xiang Yan, Alexander C. Whittaker, Benjamin Gréselle   +2 more
wiley   +1 more source

Thermal imprint of rift-related processes in orogens as recorded in the Pyrenees [PDF]

, 2014
International audience19 The extent to which heat recorded in orogens reflects thermal conditions inherited from 20 previous rift-related processes is still debated and poorly documented.
Bernet, M, Gautheron, C, Lahfid, Abdeltif, Le Pourhiet, Laetitia, Masini, E, Mouthereau, Frédéric, Pik, R, Tibari, B, Vacherat, Arnaud   +8 more
core   +3 more sources

Sub-Quaternary Himalayan tectonics inferred from luminescence thermochronometry

, 2022
A system of successively forming north-dipping crustal-scale thrusts, extending along the Himalayan arc, and merging at depth into the Main Himalayan Thrust (MHT), have accommodated most of the convergence between the Indian and Eurasian tectonic plates since at least the early Miocene.
openaire   +2 more sources

Latest Cretaceous to Cenozoic Exhumation Patterns in the Northern Andes From the Sedimentary Provenance Record on the Broken Retro‐Foreland Putumayo Basin

Basin Research, Volume 37, Issue 3, May/June 2025.
(A) Tectonic model of the Putumayo Basin showing the several collisional events that triggered the inversion of preexistent Jurassic rift sequences during the Upper Cretaceous and their influence in the provenance sources from the synorogenic deposits. Brown arrows suggest Amazonian and Putumayo basement sources, dark green arrows suggest a provenance ...
Giovanny Nova, Mauricio Parra, Agustín Cardona, Brian K. Horton, Victor A. Valencia, Andrés Mora, Cleber Soares   +6 more
wiley   +1 more source

The beginnings of geography teaching and research in the University of Glasgow: the impact of J.W. Gregory [PDF]

, 2009
J.W. Gregory arrived in Glasgow from Melbourne in 1904 to take up the post of foundation Professor of Geology in the University of Glasgow. Soon after his arrival in Glasgow he began to push for the setting up of teaching in Geography in Glasgow, which ...
Bernard E. Leake, Bishop P., Evans D. J. A., Evans I. S., Geikie A., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Gregory J. W., Livingstone D. N., Lovering J. F., Marvin U. B., Paul Bishop, Steers J. A., Wegener A.   +22 more
core   +1 more source