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Browsing ELibrary by Title
Now showing items 18172-18191 of 26297
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(2004)There are two types of sparry magnesite deposits in the Southern Urals province: 1 ) layer-like bodies in the stratigraphic dolostone horizons; 2) lens-like bodies in the dolomitized limestones. The sparry magnesite deposits ...
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(1989)A single crystal X-ray investigation of yafsoanite resulted ina = 12.632(2) , space groupIa3d, cell content 8 Ca3Te2Zn3O12 (with some Pb for Ca),R = 0.075,wR = 0.028 for 186 independent reflections. Contrary to the results ...
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(2002)The Siberian craton has been tectonically regionalized. Comparison of isotopic ages shows that this craton formed in the late Paleoproterozoic (2.0-1.8 Ga) after Archean microcontinents had collided and amalgamated. The ...
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YAMATO 86029: AQUEOUSLY ALTERED AND THERMALLY METAMORPHOSED CI-LIKE CHONDRITE WITH UNUSUAL TEXTURES (2003)We describe the petrologic and trace element characteristics of the Yamato 86029 (Y-86029) meteorite. Y-86029 is a breccia consisting of a variety of clasts, and abundant secondary minerals including coarse- and fine-grained ...
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(2006)Baghdadite from Fuka, Okayama Prefecture, Japan shows a bright yellow fluorescence under UV (Hg 253.7 nm) excitation. The photoluminescence (PL) spectrum at 300 K consists of one large band near 580 nm and two small UV ...
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(2003)Many techniques have been developed to calculate the elastodynamic response of a stack of plane layers to a plane, spectral wave. These variations on the original propagator matrix method, commonly called the Haskell matrix ...
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(2002)The failure behavior of rocks can be quite complex, affected by such factors as stress path, anisotropy, and loading types and conditions. To understand the mechanical behavior of rocks under complex field conditions, the ...
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(2006)New radiocarbon and optical dates show that the Holocene Danube delta started to build out of a Black Sea embayment ~5200 yr ago. Delta lobe development phases differ by as much as 5 k.y. from previously proposed ages. The ...
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(1988)In the Udachnaya kimberlite pipe in the Daldyn field, Yakutia, the authors discovered and studied in our Institute the new carbonate Na2Ca(CO3)2, called zemkorite and close in composition to the known carbonate nyerereite, ...
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(2006)The zeolites and coexisting minerals of the silicic vitric tuffs in the Alaçatı (Çeşme) area, west of İzmir (Turkey), were studied. Mordenite is the most abundant zeolite in tuffs of the Alaçatı area and usually coexists ...
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(2001)Over the past 40 years, two universally accepted maxims of geology dealing with zeolite minerals have been shown to be incorrect: the first is that zeolites occur primarily as cavity fillings in basaltic igneous rocks, and ...
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(2000)A group of low-temperature peridotites with equigranular mosaic texture is distinguished among spinel peridotite xenoliths from Pliocene basanites of the Dzhilinda River. The mineral compositions of these peridotites are ...
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(2005)The mobility and solid-state speciation of zinc in a pseudogley soil (pH = 8.2–8.3) before and after contamination by land-disposition of a dredged sediment ([Zn] = 6600 mg kg−1) affected by smelter operations were studied ...
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(2006)Biofilm-embedded Mn oxides exert important controls on trace metal cycling in aquatic and soil environments. The speciation and mobility of Zn in particular has been linked to Mn oxides found in streams, wetlands, soils, ...
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(2004)The ‘Snowball Earth’ model of Hoffman et al. [Science 281 (1998) 1342] has stimulated renewed interest in the causes of glaciation in Earth history and the sedimentary, stratigraphic and geochemical response. The model ...
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(2004)(U-Th)/He chronometry of zircon has a wide range of potential applications including thermochronometry, provided the temperature sensitivity (e.g., closure temperature) of the system be accurately constrained. We have ...
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(2006)Sensitive high-resolution ion microprobe (SHRIMP) U-Pb ages for detrital zircons from the Caspian region reveal the age ranges of basement terrains that supplied the sediment. One sample from the modern Volga river has ...
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(2006)Yulong ore-bearing porphyries, along the northwestern extension of the Red River–Ailao Shan fault system in eastern Tibet, consist of five porphyry deposits, containing a total of more than 8 million tons of copper resources. ...
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(2006)In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U-Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...
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(2006)In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U–Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...
Now showing items 18172-18191 of 26297