Results 111 to 120 of about 4,931 (238)

Current controversies in the Caledonides [PDF]

open access: yes, 1999
No abstract ...
Bluck, B.J., Tanner, P.W.G.
core  

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 6, Page 417-439, July 2026.
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   +4 more
wiley   +1 more source

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)

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 6, Page 440-469, July 2026.
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   +4 more
wiley   +1 more source

Using U-PB Geochronology to Constrain the Formation of a New Jersey Nelsonite

open access: yes, 2014
The gneisses in the New Jersey Highlands host a collection of small ore bodies called nelsonites that are primarily comprised of apatite and magnetite. Other minerals present include significant amounts of pyroxenes, amphiboles, and quartz that signify ...
Lewis, Lauren
core  

A Mountain Glacier Perspective on the Bipolar Seesaw

open access: yesGeophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract A global record of mountain glacier terminations during the last deglaciation (∼19–11 ka) dated by a large, uncurated data set of cosmogenic‐nuclide exposure ages highlights a statistically significant asynchrony in termination ages between the Northern and Southern Hemispheres.
Joseph P. Tulenko, Greg Balco
wiley   +1 more source

U-Pb geochronology of detritai zircons from Caratas and Los Arroyos Formations, northeastern Venezuela

open access: yes, 2013
LA-MC-ICPMS U-Pb geochronology in detrital zircons was performed in two Tertiary turbidite sequences from Northeastern Venezuela to contribute to the understanding of the Cenozoic history of the northern South America plate.
NOGUERA, Mariela I.   +3 more
core  

Late Carboniferous Paleomagnetism From North Qiangtang Block Reveals a Multibranched Paleo‐Tethys Ocean

open access: yesGeophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang   +12 more
wiley   +1 more source

Data for: U-Pb geochronology of paleosol carbonate cements by LA-ICP-MS: A proof of concept and strategy for dating the terrestrial record

open access: yes
U-Pb and laser methods data for the manuscript by Aguirre-Palafox et al. to be published by Geochimica et Cosmochimica Acta as "U-Pb geochronology of paleosol carbonate cements by LA-ICP-MS: A proof of concept and strategy for dating the terrestrial
Aguirre Palafox, L (via Mendeley Data)
core   +1 more source

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