Now showing items 1-10 of 34
Pre-Tertiary stratigraphy, magmatism, and structural history of the Central Jackson Mountains, Humboldt County, Nevada
The Jackson Mountains (JM) are part of the early Mesozoic continental arc in northwest Nevada, which was constructed upon previously accreted Paleozoic basement. The stratigraphy of the Paleozoic basement exposed in the ...
Major and trace element compositions and strontium, neodymium, and lead isotopic ratios of late Cenozoic mafic lavas from the northern Basin and Range
During the late Cenozoic mafic lavas were emplaced contemporaneously with Basin and Range extension near Battle Mountain, Nevada. They display wide ranges in major and trace elements contents and Sr, Nd, and Pb ratios. The ...
Tectonic and thermal history of the western Serrania del Interior foreland fold and thrust belt and Guarico Basin, north central Venezuela: Implications of new apatite fission track analysis and seismic interpretation
Structural analysis, interpretation of seismic reflection lines, and apatite fission-track analysis in the Western Serrania del Interior fold and thrust belt and in the Guarico basin of north-central Venezuela indicate ...
SILICA PRESERVATION IN THE OCEANS
This study was undertaken to explain why silica is preserved in the oceans, which are undersaturated in silica. Ion probe, electron probe and SEM analysis of the surface chemistry of radiolarians (a siliceous microfossil) ...
MODELS TO OPTIMIZE THE EVALUATION AND EXTRACTION OF URANIUM FROM SEDIMENTARY ORE DEPOSITS WITH APPLICATIONS TO IN-SITU LEACHING
With increasing demands for nuclear power supplies, more efficient means of evaluation and extraction of sedimentary uranium ore deposits, which form 96% of the U.S. reserves, are required. The fluvial, deltaic, and ...
SOME PROBLEMS CONCERNING THE MIGRATION AND DISTRIBUTION OF HELIUM-4 AND RADON-222 IN THE UPPER SEDIMENTS OF THE CRUST - A THEORETICAL MODEL; AND THE DEVELOPMENT OF A QUADRUPOLE ION FILTER FOR MEASURING HELIUM AT THE SOIL-AIR INTERFACE
The generation, distribution, and migration process of helium-4 and radon-222 in the upper lithosphere and their fluxes at the soil-air interface were extensively reviewed. Global baseline concentration values were obtained ...