Quantitatively determining the amount of chemical weathering within sedimentary rocks (and profiles) took a major step forward with creation index alteration (CIA) 40 years ago. The CIA relates proportion immobile aluminum to mobile cations calcium, sodium, and potassium is grounded in empirical modeled geochemical data for mineral reactions that occur during hydrolysis. However, should be appl...

The Fushun Basin is a typical continental basin filled with organic-rich fine-grained sedimentary rocks, such as coal, oil shale and greyish green mudstone. Currently, research on this predominantly focuses the enrichment mechanisms of organic matter in coal controlling factors seam transformation to shale. However, during stage, deposition ceased was converted interbeds grey mudstone thin laye...

Abs~'act Lower Proterozoic stromatolites and associated clastic carbonate deposits of the Campbell Group, flom the southern margin (Prieska area) of the Kaapvaal Craton, northern Cape Province, are described. Contrary to previous interpretations (Beukes, 1978; 1980a) shallow subtidal to suprafidal facies a r e recognised and discussed in regional context. An alternative model for the facies dev...

We used LA-ICP-MS U-Pb data for detrital zircon to constrain the Maximum Depositional Age (MDA) and provenance of clastic sedimentary rocks Volyn-Orsha basin, which filled an elongated (~625 × 250 km) depression in SW Baltica attained ~900 m thickness. Eighty-six zircons out one hundred three yielded concordant dates, with most them (86%) falling time interval between 1655 ± 3 1044 16 Ma cluste...

Evidence of hydrothermal activity is reported for the Mesozoic pre- and syn-rift successions western Adriatic palaeomargin Alpine Tethys, preserved in Western Southalpine Domain (NW Italy). The products processes are represented by vein breccia cements, as well dolomitization silicification host rocks. In eastern part study area, interpreted necking zone continental margin, Middle Triassic dolo...

The paper presents the latest state of knowledge on clastic sedimentary rocks from Carboniferous complex in SW part Polish Lowlands, studied to help determine their potential prospectivity for occurrence oil and/or gas deposits. Rocks were analyzed with respect petrographic-mineralogical characteristics deposits, diagenesis, determinations pressure-temperature conditions mineral formation and h...

Sandstone intrusions are found in all sedimentary environments but have been reported most commonly from deep-water settings. They also appear to be more frequently developed in tectonically active settings where applied tectonic stresses facilitate development of high fluid pressures within the sediments. A variety of mechanisms have been cited as triggers for clastic intrusions. These include...