Results 51 to 60 of about 45,144 (177)
Meteoritics &Planetary Science, Volume 60, Issue 5, Page 1263-1283, May 2025.Abstract This study presents a refined approach to determine 14C saturation activities and 14C/10Be saturation activity ratios in chondritic meteorites with the goal to improve terrestrial age dating. By combining new model calculations for 10Be, 14C, and cosmogenic (22Ne/21Ne)cos, along with experimental data from 17 freshly fallen chondrites, we ...
Mohammad Tauseef +7 more
wiley +1 more source
The iodine-plutonium-xenon age of the Moon-Earth system revisited
, 2014 From iodine-plutonium-xenon isotope systematics, we re-evaluate time constraints on the early evolution of the Earth-atmosphere system and, by inference, on the Moon-forming event. Two extinct radioactivites (129I, T1/2 = 15.6 Ma, and 244Pu, T1/2 = 80 Ma)
Avice, Guillaume, Marty, Bernard
core +3 more sources
Extremely low long‐term erosion rates around the Gamburtsev Mountains in interior East Antarctica [PDF]
, 2010 The high elevation and rugged relief (>3 km) of the Gamburtsev Subglacial Mountains (GSM) have long been considered enigmatic. Orogenesis normally occurs near plate boundaries, not cratonic interiors, and large‐scale tectonic activity last occurred in ...
Cox, S. E. +4 more
core +2 more sources
Journal of Geophysical Research: Planets, Volume 130, Issue 4, April 2025.Abstract The “light mantle” deposit at the base of South Massif in the Moon's Taurus‐Littrow Valley was a primary science target for the Apollo 17 exploration. The possibility that it was a landslide triggered by ejecta from Tycho Crater is critical for establishing the age of Tycho and constraining recent lunar impact chronology; however, the ...
Mason Neuman +40 more
wiley +1 more source
Refining the Eruption Chronology of Atitlán Caldera Through Zircon Double‐Dating
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.Abstract Precise dating of Quaternary volcanism is vital for risk mitigation, understanding volcano‐climate interactions, and deciphering the evolution of large silicic magmatic systems. The Atitlán caldera in Guatemala has experienced major eruptions that challenge radiometric dating techniques and complicate eruption chronology in this densely ...
Alejandro Cisneros de León +7 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 130, Issue 3, March 2025.Abstract As part of the Apollo Next‐Generation Sample Analysis (ANGSA) program, we provide bulk composition, mineralogy, petrology, and noble gas assays of lunar particles and soils from the top half of the 73001/2 double‐drive tube (i.e., 73002) studied by the ANGSA consortium.
Barbara A. Cohen +7 more
wiley +1 more source
I-129 Waste form Using Bi-Zn-P-Oxide Glass
, 2013 I-129 is a problematic nuclide generated from the recycling of spent fuel by pyroprocess. Gaseous form of radiogenic iodine is trapped by using silver exchanged zeolite (AgX) at Korea Atomic Energy Research Institute (KAERI). We developed the low melting
Jae-Hwan Yang +3 more
semanticscholar +1 more source
Studying the Earth with Geoneutrinos [PDF]
, 2013 Geo-neutrinos, electron antineutrinos from natural radioactive decays inside the Earth, bring to the surface unique information about our planet. The new techniques in neutrino detection opened a door into a completely new inter-disciplinary field of ...
Ludhova, Livia, Zavatarelli, Sandra
core +2 more sources
Westernmost Grand Canyon incision: Testing thermochronometric resolution [PDF]
, 2017 The timing of carving of Grand Canyon has been debated for over 100 years with competing endmember hypotheses advocating for either a 70 Ma (“old”) or
Fox, MR +5 more
core +1 more source
Lu-Hf Chronology in Chondrites and the Role of Phosphates. [PDF]
, 2016 第2回極域科学シンポジウム/第34回南極隕石シンポジウム 11月17日（木） 国立国語研究所 ...
Amelin Y., Debaille V., Yin Q.-Z.
core +1 more source