In this study, a set of laboratory experiments was carried out to study the parameters hydraulic fractures induced in dry and mineral-oil-saturated rocks compare them with geomechanical characteristics tested samples. We chose sandstone thermally treated granite as materials for research. There are very few known studies related mechanical acoustic properties oil-saturated rocks, even fewer des...

Introduction: Several lunar highland meteorites were found in the Dhofar region of Oman. Here we report the first data on the petrography and mineralogy of four new lunar stones, Dhofar 304, 305, 306 and 307. Dh-304 was found close to Dh-025 and 301, whereas Dh-305, 306 and 307 were recovered nearby Dh-081, 280, 302 and 303. The new meteorites are moderately weathered, impact-melt breccias. No ...

Cryptoendolithic microbial communities living within Antarctic rocks are an example of survival in an extremely cold and dry environment. The extinction of these micro-organisms formerly colonizing sandstone in the Mount Fleming area (Ross Desert), was probably provoked by the hostile environment. This is considered to be a good terrestrial analogue of the first stage of the disappearance of po...

Chromite is widely distributed in the east and southeast of Afghanistan, especially in Logar Province. Chromite mineralization is podiform-type and is hosted in the stratigraphically lowest ultramafic rocks of the Logar Ophiolite Complex. This ophiolite complex represents a remnant of an early Cretaceous oceanic crust that was thrusted over a late Permian to Mid-Jurassic platform-type sequence ...

introduction in the east and northeast of sanandaj in the qorveh-bijar-takab axis, there are series of basaltic composition volcanoes with quaternary age. the study area is part of the sanandaj-sirjan zone and is located between 47°52' and 47°57' e longitudes and 35°26 and '35°30' n latitudes. due to the location of the volcanic cone on pliocene clastic sediments and quaternary travertine, the ...

This paper discusses the content, distribution, modes of occurrence, and enrichment mechanism of mineral matter and trace elements of an Early Permian coal from Songshao (Yunnan Province, China) by means of coal-petrological, mineralogical, and geochemical techniques. The results show that the Songshao coal is characterized by high total and organic sulfur contents (3.61% and 3.87%, respectivel...

Contents 1. Introduction 2. Soil acidity and its indices 2.1. Actual acidity. 2.2. Potential acidity. 2.3. Cation (positive ion) exchange capacity and saturation with bases. 3. Natural reasons for increasing soil acidification 3.1. Leaching regime. 3.2. Soil-forming rocks and plants. 3.3. The distribution of acid soils. 4. The reasons for anthropogenic acidification of soils. The phenomenon of ...

CRONO is a new code for simulating chemical weathering. This program allows for the simulation of complex scenarios of interaction in water-rock-gas systems while accounting for mineral dissolution kinetics and solution transport. The thermodynamic calculations are realized using the GEOCHEQ program. CRONO was developed for simulations of regolith formation on the surfaces of early Earth and Ma...