Results 1 to 10 of about 96,623 (225)

Modeling apparent Pb loss in zircon U–Pb geochronology [PDF]

Geochronology, 2023
The loss of radiogenic Pb from zircon is known to be a major factor that can cause inaccuracy in the U–Pb geochronological system; hence, there is a need to better characterize the distribution of Pb loss in natural samples.
G. R. Sharman, M. A. Malkowski
doaj   +4 more sources

GZ7 and GZ8 - Two Zircon Reference Materials for SIMS U-Pb Geochronology. [PDF]

Geostand Geoanal Res, 2018
Here, we document a detailed characterisation of two zircon gemstones, GZ7 and GZ8. Both stones had the same mass at 19.2 carats (3.84 g) each; both came from placer deposits in the Ratnapura district, Sri Lanka. The U‐Pb data are in both cases concordant within the uncertainties of decay constants and yield weighted mean 206Pb/238U ages (95 ...
Nasdala L, Corfu F, Schoene B, Tapster SR, Wall CJ, Schmitz MD, Ovtcharova M, Schaltegger U, Kennedy AK, Kronz A, Reiners PW, Yang YH, Wu FY, Gain SEM, Griffin WL, Szymanowski D, Chanmuang N C, Ende M, Valley JW, Spicuzza MJ, Wanthanachaisaeng B, Giester G.   +21 more
europepmc   +13 more sources

Calibrating the zenith of dinosaur diversity in the Campanian of the Western Interior Basin by CA-ID-TIMS U-Pb geochronology. [PDF]

Sci Rep, 2022
The spectacular fossil fauna and flora preserved in the Upper Cretaceous terrestrial strata of North America’s Western Interior Basin record an exceptional peak in the diversification of fossil vertebrates in the Campanian, which has been termed the ...
Ramezani J, Beveridge TL, Rogers RR, Eberth DA, Roberts EM.   +4 more
europepmc   +2 more sources

Long-term repeatability and interlaboratory reproducibility of high-precision ID-TIMS U-Pb geochronology.

J Anal At Spectrom, 2021
Age determination of minerals using the U–Pb technique is widely used to quantify time in Earth's history. A number of geochronology laboratories produce the highest precision U–Pb dates employing the EARTHTIME 202Pb–205Pb–233U–235U tracer solution for ...
Schaltegger U, Schaltegger U, Ovtcharova M, Gaynor SP, Schoene B, Wotzlaw JF, Davies JFHL, Farina F, Greber ND, Szymanowski D, Chelle-Michou C.   +10 more
europepmc   +2 more sources

Expanding the limits of laser-ablation U–Pb calcite geochronology [PDF]

Geochronology, 2020
U–Pb geochronology of calcite by laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) is an emerging field with potential to solve a vast array of geologic problems.
A. R. C. Kylander-Clark
doaj   +4 more sources

Data analysis of the U–Pb geochronology and Lu–Hf system in zircon and whole-rock Sr, Sm–Nd and Pb isotopic systems for the granitoids of Thailand [PDF]

Data in Brief, 2018
This data article provides zircon U–Pb and Lu–Hf isotopic information along with whole-rock Sm–Nd, Sr and Pb isotopic geochemistry from granitoids in Thailand.
Romana E.C. Dew, Simon Nachtergaele, Alan S. Collins, Stijn Glorie, John Foden, Johan De Grave, Morgan L. Blades, Christopher K. Morley, Noreen J. Evans, Brandon L. Alessio, Pitsanupong Kanjanapayont, Rosalind King, Punya Charusiri   +12 more
doaj   +2 more sources

Regional zircon U-Pb geochronology for the Maniitsoq region, southwest Greenland. [PDF]

Sci Data, 2021
AbstractZircon U-Pb geochronology places high-temperature geological events into temporal context. Here, we present a comprehensive zircon U-Pb geochronology dataset for the Meso- to Neoarchean Maniitsoq region in southwest Greenland, which includes the Akia Terrane, Tuno Terrane, and the intervening Alanngua Complex.
Olierook HKH, Kirkland CL, Hollis JA, Gardiner NJ, Yakymchuk C, Szilas K, Hartnady MIH, Barham M, McDonald BJ, Evans NJ, Steenfelt A, Waterton P.   +11 more
europepmc   +9 more sources

Chemical abrasion applied to LA-ICP-MS U-Pb zircon geochronology [PDF]

Minerals, 2014
Zircon (ZrSiO4) is the most commonly used mineral in U-Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of age determinations.
Benn, Keith, Chew, David, Crowley, Quentin G., Heron, Kyle, Kamber, Balz, McConnell, Brian, Riggs, Nancy Rosalind   +6 more
core   +6 more sources

µID-TIMS: spatially resolved high-precision U–Pb zircon geochronology [PDF]

Geochronology
We present a novel methodology for spatially resolved high-precision U–Pb geochronology of individual growth domains in complex zircon. Our approach utilizes a multi-ion-species (Xe+/Ar+) plasma focused ion beam (PFIB)–femtosecond (fs) laser system ...
S. Markovic, J.-F. Wotzlaw, D. Szymanowski, J. Reuteler, P. Zeng, C. Chelle-Michou   +5 more
doaj   +5 more sources

A calcite reference material for LA‐ICP‐MS U‐Pb geochronology [PDF]

Geochemistry, Geophysics, Geosystems, 2017
AbstractU‐Pb dating of calcite is an emerging but rapidly growing field of application in geochronology with great potential to inform problems in landscape, basin, and mountain belt evolution, through age determination of diagenetic cements, vein mineralization, and geological formations difficult to date otherwise.
Nick M. W. Roberts, E. Troy Rasbury, Randall R. Parrish, Christopher J. Smith, Matthew S. A. Horstwood, Daniel J. Condon   +5 more
openaire   +4 more sources