J
John W. Valley
Researcher at University of Wisconsin-Madison
Publications - 518
Citations - 34568
John W. Valley is an academic researcher from University of Wisconsin-Madison. The author has contributed to research in topics: Zircon & Isotopes of oxygen. The author has an hindex of 87, co-authored 500 publications receiving 31230 citations. Previous affiliations of John W. Valley include Rice University & NASA Astrobiology Institute.
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Journal ArticleDOI
Improved 206Pb/238U microprobe geochronology by the monitoring of a trace-element-related matrix effect; SHRIMP, ID-TIMS, ELA-ICP-MS and oxygen isotope documentation for a series of zircon standards
Lance P. Black,Lance P. Black,Sandra L. Kamo,Charlotte M. Allen,Donald W. Davis,John N. Aleinikoff,John W. Valley,Roland Mundil,Ian H. Campbell,R. J. Korsch,Ian S. Williams,Chris Foudoulis +11 more
TL;DR: In this article, the authors investigated correlations between the age offsets and P, Sm and Nd abundances in the zircons, and concluded that the presence of Nd is not the primary cause of the apparent matrix effect.
Journal ArticleDOI
Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago.
TL;DR: The discovery of a detrital zircon with an age as old as 4,404 ± 8 Myr is reported, about 130 million years older than any previously identified on Earth and represents the earliest evidence for continental crust and oceans on the Earth.
Journal ArticleDOI
Further characterisation of the 91500 zircon crystal
Michael Wiedenbeck,John M. Hanchar,William H. Peck,Paul J. Sylvester,John W. Valley,Martin J. Whitehouse,Andreas Kronz,Yuichi Morishita,Lutz Nasdala,Jens Fiebig,Ian A. Franchi,J.-P. Girard,Richard C. Greenwood,R. W. Hinton,Noriko T. Kita,Paul R.D. Mason,Marc D. Norman,M. Ogasawara,Philip M. Piccoli,Dieter Rhede,Hisao Satoh,B. Schulz-Dobrick,Øyvind Skår,Mj. Spicuzza,Kentaro Terada,Andrew G. Tindle,Shigeko Togashi,Torsten Vennemann,Q. Xie,Yong-Fei Zheng +29 more
TL;DR: In this article, the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma-mass spectrometer (LA-ICP-MS), secondary ion mass spectrometry (SIMS), and laser fluorination analyses, were reported.
Journal ArticleDOI
4.4 billion years of crustal maturation: oxygen isotope ratios of magmatic zircon
John W. Valley,Jade Star Lackey,Jade Star Lackey,Aaron J. Cavosie,Aaron J. Cavosie,Cory C. Clechenko,Michael J. Spicuzza,Miguel Angelo Stipp Basei,Ilya N. Bindeman,Valderez P. Ferreira,Alcides N. Sial,Elizabeth King,William H. Peck,A. K. Sinha,Chun-Sheng Wei +14 more
TL;DR: In this article, the authors summarized data for δ18O in zircons that have been analyzed from 1,200 dated rocks ranging over 96% of the age of Earth.