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ELibrary: Recent submissions
Now showing items 121-140 of 22407
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(2006)We have investigated the potential of hubnerite for U-Pb dating. Hubnerite forms typically at medium to low-temperatures in a wide range of pneumatolytic-hydrothermal mineral deposits, particularly porphyry molybdenum and ...
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(2006)Naturally weathered feldspar surfaces in the Jurassic Navajo Sandstone at Black Mesa, Arizona, was characterized with high-resolution transmission and analytical electron microscope (HRTEM-AEM) and field emission gun ...
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(2006)We measured solid-phase Mo and U concentrations in marine sediments from the California, Mexico, Peru, and Chile margins to ascertain the behavior of Mo and U during early diagenesis in continental margin settings. At sites ...
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(2006)Uranyl silicates such as uranophane and Na-boltwoodite appear to control the solubility of uranium in certain contaminated sediments at the US Department of Energy Hanford site [Liu, C., Zachara, J.M., Qafoku, O., McKinley, ...
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(2006)To elucidate the age and origin of seamounts in the eastern North Atlantic, 54 titanite and 10 zircon fractions were dated by the U-Pb chronometer, and initial Pb, Sr, and Hf isotope ratios were measured in feldspars and ...
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(2006)The pool of iron oxides, available in sediments for reductive dissolution, is usually estimated by wet chemical extraction methods. Such methods are basically empirically defined and calibrated against various synthetic ...
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(2006)Reduced sulfur species were studied to constrain isotopic exchange-mixing with synthetic polysulfide cross-linked macromolecules (PCLM), model sulfur containing molecules and natural sulfur-rich kerogen, asphalt and oil ...
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(2006)The oceanic cycle of cadmium is still poorly understood, despite its importance for phytoplankton growth and paleoceanographic applications. As for other elements that are biologically recycled, variations in isotopic ...
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(2006)Trace elements in calcareous organisms have been widely used for paleoclimatic studies. However, the factors controlling their incorporation into mollusc shells are still unclear. We studied here the Sr, Mg, Ba and Mn ...
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(2006)U-series disequilibria measured in waters and rocks from a chalk aquifer in France have been used as an analog for long-term radionuclide migration. Drill core samples from a range of depths in the vadose zone and in the ...
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(2006)The relationship between potential elemental proxies (Mg/Ca, Sr/Ca and Mn/Ca ratios) and environmental factors was investigated for the bivalve Pecten maximus in a detailed field study undertaken in the Menai Strait, Wales, ...
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(2006)Shear faults in Upper Cretaceous limestones of the central Negev desert adjacent to the Dead Sea Transform (DST) feature extensive ferruginous mineralization and dolomitization. This has been related to topographically ...
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(2006)Antarctic lunar meteorites Meteorite Hills 01210 and Pecora Escarpment 02007 are breccias that come from different regolith lithologies on the Moon. MET 01210 is composed predominantly of fractionated low-Ti basaltic ...
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(2006)We present a detailed study of the co-diagenesis of Fe and P in hydrothermal plume fallout sediments from ?19?S on the southern East Pacific Rise. Three distal sediment cores from 340-1130 km from the ridge crest, collected ...
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(2006)В статье рассматривается качество районизации. Главным выдвигается критерий «затраты-точность». Ставится вопрос сравнения двух районизаций одной территории. Приводится алгоритм позволяющий осуществить такое сравнение.
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(2006)Методические и технологические вопросы построения сложной территориально распределенной информационной системы в сфере геологического изучения и использования недр на примере создания информационной системы государственного ...
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(2006)В статье рассматривается метод обработки информации о геоинформационных объектах на основе топологических отношений. Данный метод позволяет формализовать топологическую составляющую пространственных объектов и на ее основе ...
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(2006)Water has played an important role in the Earth’s evolution. The incorporation of water as hydroxyl into solid mineral phases or as coexisting hydrous fluids and melts affects the chemical and physical properties of crust ...
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(2006)Hydrogen traces change the physical properties of mantle minerals to an extent that is far out of proportion to its low concentration. These properties include mechanical strength, melting behavior, diffusion rate, electrical ...
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(2006)Peridotites associated with pyroxenites (with rare olivine and spinel) are exposed on the islands of San Jorge and Santa Isabel in the Solomon Islands. Orthopyroxenite occurs in large outcrops (?100?m2) whereas websterite ...
Now showing items 121-140 of 22407