1376. [14] Michalski, J. R. et al. (2005), LPSC XXXVI, Abstract #1188. [15] Hamilton and Lucey (2005), LPSC XXXVI, Abstract #1272. [16] Christensen et al. (2000), JGR, 105, 9735-9739. [17] Reyes, D. P. (1994), M.S. Thesis, Arizona State University, Tempe, AZ. Figure 2: Variation of components between the weathered and cut surfaces of the granitic samples. Plagioclase feldspar and quartz values ...

Earth obviously has a decent thermostat; life has thrived here uninterrupted for 3 billion years and more. But researchers have been arguing for decades about how it works— particularly when something resets the temperature. Forty million years ago, for example, the planet began slipping from a “hothouse” climate to that of an “icehouse.” Geoscientists have suspected that the rising of the Hima...

The assessment of pile drivability is the premise successful installation, and completely weathered (CW) rock may bring risk refusal. This paper presents a case driving refusal that occurred in CW gneiss layer. physical mechanical properties are analyzed based on results laboratory test, cone penetration test (CPT), standard (SPT). By comparing with those from intact gneiss, layer this study wa...

Abstract In order to further explore the large deformation control technology of high ground stress soft rock tunnel, this study takes highly weathered carbonaceous shale section Muzhailing tunnel as research background, effect scheme 1 “three-step method” and 2 “pilot expansion are compared analysed by field test numerical simulation. The results show that simulation consistent with test, tren...

Shallow bedrock strength controls both landslide hazard and the rate form of erosion, yet regional patterns in near-surface mechanical properties are rarely known quantitatively due to challenge collecting situ measurements. Here we present seismic geomechanical characterizations shallow subsurface across central Himalayan Range Nepal. By pairing widely distributed 1D shear wave velocity survey...

Out of about 1.2 billion people in India, 68% people live on agriculture as their main occupation. Ground water is therefore an important resource which provides over 70% of rural drinking water supply and about 50% of water used for irrigation. Rains in Monsoon season from June to September, provide the main source of water but they last only for four months and the rest of the year is dry in ...

The soils and underlying weathered carbonate rock in karstic regions play an important role the infiltration, storage, retention of water nutrients. Because significant heterogeneity karst, use individual geophysical techniques is often not sufficient for unambiguous assessment irregular distributions fractures. In this study, ground penetrating radar (GPR) electrical resistivity tomography (ER...

Abstract Weathering is a basic geological process that refers to the breaking down or dissolving of rocks and minerals on surface earth. However, weathering characteristics may vary among different lithologies even under similar conditions. To evaluate quantitatively compare physical chemical index alteration types rock, new concepts paleo-weathering such as absolute degree relative are propose...

A Gram-stain-negative, rod-shaped bacterial strain, JN53(T), was isolated from the surfaces of weathered rock (potassic trachyte) from Nanjing, Jiangsu Province, PR China. Strain JN53(T) grew optimally at 30 °C, pH 7.0. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain JN53(T) belonged to the genus Chitinophaga in the family Chitinophagaceae. It was most closely relat...

Uranium (U) concentration and the activities of 238U, 234U, and 230Th were determined for groundwaters, spring waters, and lake water collected from the Shihongtan sandstone-hosted U ore district and in the surrounding area, NW China. The results show that the groundwaters from the oxidizing aquifer with high dissolved oxygen concentration (O2) and oxidation-reduction potential (Eh) are enriche...