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Leonid A. Neymark
Researcher at United States Geological Survey
Publications - 73
Citations - 1274
Leonid A. Neymark is an academic researcher from United States Geological Survey. The author has contributed to research in topics: Geochronology & Zircon. The author has an hindex of 18, co-authored 70 publications receiving 1076 citations. Previous affiliations of Leonid A. Neymark include Russian Academy of Sciences & Denver Federal Center.
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234U/238U evidence for local recharge and patterns of ground-water flow in the vicinity of Yucca Mountain, Nevada, USA
TL;DR: In this paper, the authors used thermal ionization mass spectrometry on more than 280 samples from the Death Valley regional flow system to investigate hydrologic flow and downgradient dilution and dispersion in the vicinity of Yucca Mountain.
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U-Pb ages of secondary silica at Yucca Mountain, Nevada: Implications for the paleohydrology of the unsaturated zone
TL;DR: In this article, the ages of calcite and silica layers from different microstratigraphic positions in individual calcite-silica coating samples collected from fractures in the shallower part of the UZ (welded part of overlying Tiva Canyon Tuff) were analyzed.
ReportDOI
Ages and Origins of Calcite and Opal in the Exploratory Studies Facility Tunnel, Yucca Mountain, Nevada
TL;DR: In this article, the authors propose a method to solve the problem of homonymity in homonym identification, i.e., homonym-of-individuals-with-individuality.
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Precise determination of δ88Sr in rocks, minerals, and waters by double-spike TIMS: a powerful tool in the study of geological, hydrological and biological processes
TL;DR: In this paper, the authors presented strontium isotopic (88Sr/86Sr) results obtained by 87Sr-84Sr double spike thermal ionization mass-spectrometry (DS-TIMS) for several standards as well as natural water samples and mineral samples of abiogenic and biogenic origin.
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In situ LA-ICPMS U–Pb dating of cassiterite without a known-age matrix-matched reference material: Examples from worldwide tin deposits spanning the Proterozoic to the Tertiary
TL;DR: In this article, the authors proposed a new approach for in situ LA-ICPMS dating of cassiterite, which benefits from the unique chemistry of cassitite with extremely low Th concentrations (Th/U ratio of 10−4 or lower) in some cassite samples.