Results 41 to 50 of about 21,944 (246)

Dating the megalithic culture of laos: Radiocarbon, optically stimulated luminescence and U/Pb zircon results [PDF]

PLOS ONE, 2021
The megalithic jar sites of Laos (often referred to as the Plain of Jars) remain one of Southeast Asia’s most mysterious and least understood archaeological cultures. The sites, recently inscribed as UNESCO World Heritage, host hollowed stone jars, up to three metres in height, which appear scattered across the landscape, alone or clustered in groups ...
Zerboni, Andrea, Shewan, Louise, O’Reilly, Dougald, Armstrong, Richard, Toms, Phillip, Webb, John, Beavan, Nancy, Luangkhoth, Thonglith, Wood, Jamie C., Halcrow, Siân, Domett, Kate, Van Den Bergh, Julie, Chang, Nigel   +12 more
openaire   +5 more sources

Discordance dating: A new approach for dating alteration events [PDF]

Geochronology
Zircon is the premier geochronometer used to date igneous and metamorphic processes, constrain sediment provenance models, and monitor key events in Earth history such as the growth of continents and the evolution of the biosphere.
J. R. Reimink, R. Beckman, E. Schoonover, M. Lloyd, J. Garber, J. H. F. L. Davies, A. Cerminaro, A. Cerminaro, M. G. Perrot, M. G. Perrot, A. Smye   +10 more
doaj   +1 more source

Deeply subducted continental fragments - Part 2: Insight from petrochronology in the central Sesia Zone (western Italian Alps) [PDF]

, 2018
Subducted continental terranes commonly comprise an assembly of subunits that reflect the different tectono-metamorphic histories they experienced in the subduction zone.
Burn, Marco, Engi, Martin, Giuntoli, Francesco, Kunz, Barbara Eva, Lanari, Pierre   +4 more
core   +3 more sources

U-Pb (LA-ICPMS) zircon ages and Nd isotopes for granitoids of the Tamboril-Santa Quitéria Complex, Ceará Central Domain: implication for neoproterozoic syncollisional magmatism in north Borborema Province [PDF]

Geologia USP. Série Científica, 2013
The Tamboril-Santa Quitéria Complex (TSQC) is one of the largest Neoproterozoic plutonic manifestations in the northBorborema Province (NE Brazil). It represents an anatectic/igneous association characterized by a number of magmaticpulses that occurred ...
Felipe Grandjean da Costa, Carlos Eduardo Ganade de Araújo, Wagner da Silva Amaral, Antonio Maurilio Vasconcelos, Joseneusa Brilhante Rodrigues   +4 more
doaj   +1 more source

Recycling Argon through Metamorphic Reactions: the Record in Symplectites [PDF]

, 2018
The 40Ar/39Ar ages of metamorphic micas that crystallized at high temperatures are commonly interpreted as cooling ages, with grains considered to have lost 40Ar via thermally-driven diffusion into the grain boundary network.
Allaz, Anderson, Anderson, Baxter, Beltrando, Berry, Blundy, Bryhni, Christopher S. McDonald, Clare J. Warren, Connolly, Cuthbert, Dale, Daniele Regis, de Sigoyer, Di Vincenzo, Dodson, Dransfield, Engvik, Eskola, Frost, Fuhrman, Gee, Gilotti, Godard, Groppo, Hacker, Hacker, Hacker, Hacker, Heinrich, Holland, Holland, Holland, Holland, Holland, Holland, Johnson, Kellett, Krogh, Kylander-Clark, Kylander-Clark, Labrousse, Li, Li, Lux, McDonald, Mulch, Peterman, Putlitz, Renne, Roberts, Root, Root, Sarah C. Sherlock, Schmidt, Schärer, Sherlock, Simon P. Kelley, Smith, Spencer, Tajcmanová, Terry, Terry, Tucker, Villa, Villa, Wain, Wain, Walsh, Walsh, Walsh, Warren, Warren, Warren, Watson, Wheeler, White, White, Whitney, Young, Young, Young   +82 more
core   +2 more sources

Provenance and tectonic setting of Paleogene sandstone in the center of the northern Qaidam Basin, China

Journal of Natural Gas Geoscience, 2020
The average thickness of Paleogene sandstones reaches about 3000 m or even 4000 m at the northern margin of the Qaidam Basin. However, the provenance of these sandstones has been uncertain; thus, more comprehensive research is needed. Integrated research
Guoqiang Sun, Yetong Wang, Yun Jiang, Shile Pan, Shuncun Zhang, Mingfeng Zhang   +5 more
doaj   +1 more source

Simultaneous Determination of U-Pb Age and Trace Elements of Zircon by Laser Ablation Sector Field Inductively Coupled Plasma-Mass Spectrometry

Yankuang ceshi
Laser ablation sector field inductively coupled plasma-mass spectrometry (LA-SF-ICP-MS) is widely applied in U-Pb dating of zircon due to its remarkable sensitivity.
Linghao ZHAO, Dongyang SUN, Mingyue HU, Jihai YUAN, Chenzi FAN, Xiuchun ZHAN   +5 more
doaj   +1 more source

Fault Slip and Exhumation History of the Willard Thrust Sheet, Sevier Fold‐Thrust Belt, Utah: Relations to Wedge Propagation, Hinterland Uplift, and Foreland Basin Sedimentation [PDF]

, 2019
Zircon (U‐Th)/He (ZHe) and zircon fission track thermochronometric data for 47 samples spanning the areally extensive Willard thrust sheet within the western part of the Sevier fold‐thrust belt record enhanced cooling and exhumation during major thrust ...
Barber, D. E., Eleogram, Bryan, Kelley, Shari, Stockli, Daniel F., Wells, Michael L., Yonkee, W. A.   +5 more
core   +2 more sources

SHRIMP Zircon U-Pb Dating of Mid-Pleistocene Dacite and Discussion of Relative Problems

Yankuang ceshi, 2015
K-Ar and U series disequilibria methods have been applied to geochronology research of young volcanic rocks in Tengchong, China. Previous K-Ar dating methods yielded ages of 0.013 to 17.84 Ma and isochron ages of 0.13 to 2.9 Ma in this area. The U series
LI Lin-lin, WANG Shu-bing, SHI Yu-ruo
doaj   +1 more source

U–Pb zircon ages of the host rocks of the Juomasuo Au–Co–Cu deposit, northeastern Finland [PDF]

Bulletin of the Geological Society of Finland, 2017
The Salittu Formation is one of the few metavolcanic successions in the U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine the age of the host rocks of the Juomasuo Au-Co-Cu deposit located in the late Archean ...
P. Nikkola, I. Mänttäri, O.T. Rämö
doaj   +1 more source