We present models of the spectral reflectances of groups of outer Solar System objects defined primarily by their colors in the spectral region 0.4 -1.2pm , and which have geometric albedo 0.04 at wavelength 0.55pm . Our models of the groups with the strongest reflectance gradients (reddest colors) use combinations of organic tholins. We test the hypothesis that metal-reddened igneous rock-form...

A sound knowledge of mechanical properties of rocks at high temperatures and pressures is essential for modelling volcanological problems such as fracture of lava flows and dike emplacement. In particular, fracture toughness is a scale invariant material property of a rock that describes its resistance to tensile failure. A new fracture mechanics apparatus has been constructed enabling fracture...

Keyword: Mg isotopes Igneous rock standards MC-ICP-MS To provide inter-lab comparison for high-precision Mg isotope analysis, Mg isotope compositions (expressed as δMg relative to DSM-3) for commercially accessible peridotite, basalt, andesite, and granite geostandards have been measured by multi-collector inductively coupled mass-spectrometry (Nu-Plasma) using sample-standard bracketing method...

In view of the current situation shortage alkaline aggregate and abundance weakly acidic weathered igneous rocks around Nairobi, Kenya, in order to fully improve adhesion performance asphalt rocks, this paper studies effects different anti-stripping agents separately combined on aggregates. The results show that agent can property medium rock asphalt, effect is better when combined.

Introduction: After about 400 m of MSL Curiosity rover travel, at Bathurst Inlet, sol 54, two APXS analyses were made. On sol 102 Rocknest_3 at the Rocknest site was also analysed by APXS. Bathurst is part of an in-situ, eroded surface (Fig. 1a). The association of Rocknest_3 (Fig. 1b) with surrounding, similar rocks at the Rocknest site strongly suggests that it has a local origin as well. Bot...

We present paleomagnetic secular variation and paleointensity from the Early Permian Tarim large igneous province, NW China. The studied sections comprise a total of ~400 m of basaltic flows. Paleomagnetic directions were determined for 11 flows. Four successive flows with a cumulative thickness of ~150 m showed a statistically identical paleomagnetic direction. Assuming a paleosecular variatio...

Subjects learned to classify images of rocks into the categories igneous, metamorphic, and sedimentary. In accord with the real-world structure of these categories, the to-be-classified rocks in the experiments had a dispersed similarity structure. Our central hypothesis was that learning of these complex categories would be improved through observational study of organized, simultaneous displa...

Introduction: A TES spectral study of low albedo (LA) deposits within the Amazonis Planitia of Mars revealed that the derived bulk composition of these deposits contain very low silica contents (Fig. 1), classifying some of the deposits as foidites [1]. A foidite is an igneous rock in which feldspathoid minerals constitute ≥60% of the light-colored mineralogy; it is the inclusion of feldspathoi...