arghash – ghasem-abad area in ne iran is located in the rim of the sabzevar structural zone. tertiary outcrops include granite and quartz monzodiorite porphyry associated with dacite and andesite volcanic rocks. in the study area, quartz gabbro and quartz monzodiorite dykes intruded the older rocks. granite and volcanic rocks host au-sb-bearing quartz-calcite veins. mineralized veins are mainly...

available online at http://meteoritics.org 1 © Meteoritical Society, 2004. Printed in USA. Is the transition impact to post-impact rock complete? Some remarks based on XRF scanning, electron-microprobe, and thin section analyses of the Yaxcopoil-1 core in the Chicxulub crater J. SMIT,1* S. VAN DER GAAST,2 and W. LUSTENHOUWER1 1Faculty of Earth and Life Sciences, Vrije Universiteit, de Boelaan 1...

The initial transgressive phase at the Leg 144 Guyots is characterized by a typical association of sedimentary facies (from bottom to top): in situ weathered volcanic rocks; variegated clays, partly pyritic; gray clay, pyritic, homogeneous, or mottled; black clay, peaty, laminated, or bioturbated; and marine argillaceous limestone. Site 877 at Wodejebato Guyot represents the typical development...

In argillaceous rocks, which are considered as a potential host rock for nuclear waste repositories, sorption and diffusion processes govern the migration behaviour of actinides like neptunium. For the safety analysis of such a repository, a molecular-level understanding of the transport and retardation phenomena of radioactive contaminants in the host rock is mandatory. The speciation of Np du...

Ferralsols upon ultramafic rocks are among the most Cr-enriched soils at Earth surface. Weathering and erosion of these represents a major source Cr for coastal sediments downstream settings. Although mainly occurs as Cr(III)-bearing chromite Fe-(hydr)oxides in rocks, several evidences oxidized Cr(VI) relation with Mn-oxides have been reported. Regarding high solubility toxicity this latter spe...

CBR (California Bearing Ratio) value is usually used to determine the bearing capacity of a soil type. Soil conditions with low are often found in clay types. There several ways increase clay, one which by adding palm bunch ash. In this research, an analysis changes addition 5%, 7.5%, and 10% oil The results showed that largest was obtained at ash, 7.493%.

Measurement of thermal conductivity of rocks is important to understand the thermal properties of earth materials, the characteristics of terrestrial heat flow, and the formation of oil. In this paper we report thermal conductivity, thermal diffusivity, and heat capacity data for 12 conglomerate, sandstone, and gypsum-bearing samples from the Paleogene Kuqa River profile in Kuqa, China. Samples...

The putative occurrence of methane in the Martian atmosphere has had a major influence on the exploration of Mars, especially by the implication of active biology. The occurrence has not been borne out by measurements of atmosphere by the MSL rover Curiosity but, as on Earth, methane on Mars is most likely in the subsurface of the crust. Serpentinization of olivine-bearing rocks, to yield hydro...

Wray, S. L. Murchie, B. L. Ehlmann, R. E. Milliken, K. D. Seelos, E. Z. Noe Dobrea, J. F. Mustard, and S. W. Squyres, Department of Astronomy, Cornell University, Ithaca, NY 14853, USA ([email protected]), JHU/Applied Physics Lab, Laurel, MD, USA, IAS/Univ. Paris, Orsay, France, Univ. Notre Dame, Notre Dame, IN, USA, Planetary Science Institute, Tucson, AZ, USA, Brown Univ., Providence, R...

Geochemical models for Mars predict carbonate formation during aqueous alteration. Carbonate-bearing rocks had not previously been detected on Mars' surface, but Mars Reconnaissance Orbiter mapping reveals a regional rock layer with near-infrared spectral characteristics that are consistent with the presence of magnesium carbonate in the Nili Fossae region. The carbonate is closely associated w...