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Browsing ELibrary by Title
Now showing items 9046-9065 of 21936
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(2004)We have conducted petrographic, chemical and in-situ oxygen isotopic studies of refractory forsterites from unequilibrated ordinary and carbonaceous chondrites as well as an unequilibrated R-chondrite. Refractory forsterites ...
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(2002)Petrographic and petromagnetic studies of a representative collection of peridotites from various localities on the Mid-Atlantic Ridge have been carried out. It is shown that secondary magnetization of peridotites comes ...
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(1996)The matrix and fine-grained dark rims (FGDRs) around a type-A Ca-, Al-rich inclusion (CAI) and a silicate aggregate in the Mokoia CV3 chondrite differ in their major, minor, and trace element abundances. The matrix contains ...
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(2003)The Carboniferous succession in the Donets Basin hosts about 130 seams, each with a thickness over 0.45 m. Nine economically important seams from the (south)western Donets Basin are studied using organic petrographical, ...
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(1996)Diamond-bearing eclogites are an important component of the xenoliths that occur in the Mir kimberlite, Siberian platform, Russia. We have studied 16 of these eclogite xenoliths, which are characterized by coarse-grained, ...
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(2004)The Reliegos meteorite is an L5 ordinary chondrite. The chondrules are embedded in a fine-grained matrix that predominantly consists of olivine and orthopyroxene, with accessory clinopyroxene, troilite, apatite, and a ...
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(2004)Fine-grained Ca-Al-rich inclusions (FGIs) in Yamato-81020 (CO3.0) and Kainsaz (CO3.1–CO3.2) chondrites have been studied by secondary ion mass spectrometry. The FGIs from Yamato-81020 consist of aggregates of hibonite, ...
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(1990)The conversion of organic matter to petroleum products by hydrothermal activity is an easy process, occurring in nature in many types of environments. Geologically immature organic matter of marine sediments has been shown ...
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(2001)Fluid dynamics in sedimentary basins is of tremendous interest, both from a scientific and an economic point of view. Integration between fluid inclusion and present-day fluid data provides the time aspect necessary for ...
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(2001)The history of investigation into the petroleum potential of deep-seated horizons of the Uralian region is reviewed. Two major objects for oil and gas prospecting are considered: 1) Late Precambrian (Riphean and Vendian) ...
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(1989)Widespread exploration and test drilling in basins located on continental margins, chiefly on coastal plains and shelf, has revealed numerous oil and gas pools, which, as shown by analysis of geophysical data and well ...
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(2002)The Atka volcanic center, the largest modern, central Aleutian magmatic complex, covers 360 km2 with an estimated eruptive volume of ~200 km3. The oldest exposed rocks, the Old Harbor Series, are a suite of basaltic andesite ...
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(1985)The Mathematician failed rift was a fast spreading oceanic ridge prior to abandonment about 6.5 Ma. but presently has the morphology of a slow spreading ridge crest. Dredges of its inner rift valley walls indicate that it ...
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(2001)Comprehensive Petrological and geochemical studies of Albian, Late Senonian and Paleogene volcanogenic basalt-bearing formations of the Chukchi segment of the Okhotsk-Chukchi volcanic belt (CS OCVB) were carried out using ...
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(2003)Petrological and geochemical examination shows that the Hantaishir ophiolite complex of the Altai region in Mongolia contains two large ultramafic massifs (the Taishir and Naran massifs), a sheeted dyke complex, and a ...
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(2004)Ophiolites are divided into lherzolite-type (L-type) and harzburgite-type (H-type) by the lithology of their mantle peridotites. Rare depleted harzburgite-type (DH-type) is distinguished from the normal H-type by the more ...
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(2003)This paper presents a model for the formation of nickel-copper sulfide ores of the Noril'sk deposits, which originated as a result of the fluid sulfurization of iron-rich differentiates in picritic layers of gabbro-dolerite ...
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(1996)Seismic experiments imaging the deep crustal structure beneath hotspot tracks and oceanic plateaus indicate unusually high seismic velocities (VP = 7.3–7.8 km/s) at the base of the crust. These high-velocity ‘layers’, up ...
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(1995)The origin, evolution and primary melt compositions of late Cretaceous high-K ultramafic volcanics and associated basalts of Eastern Kamchatka are discussed on the basis of a study of the mineralogy and geochemistry of the ...
Now showing items 9046-9065 of 21936