The dielectric constant of a partially saturated sandstone varies as a function of the level of water saturation. Experimental data indicate that rock/water interaction, at low saturations, has a large effect on the measured dielectric response. To theoretically predict the dielectric constant of the rock/water/air system, this rock/water interaction must be accounted for by including the effec...

Aghajari Formation, known as Upper Fars Group, is developed throughout the Folded Zagros Zone and has a thickness of 2966 m in its type section in SW of Iran and 1473 m in the study area, located 20 km west of Shiraz. Aghajari Formation, in this area, consists of three major facies associations. These are "fine", "medium" and "coarse" grained terrigenous sediments, usually interpreted as channe...

This study reconstructs the depositional conditions of ironstones within Chulym-Yenisey basin and assesses iron source. The detrital minerals studied deposits include quartz feldspar. authigenic are goethite, siderite, aragonite, dolomite, calcite, apatite, barite, pyrite. clay components chlorite group (possible chamosite), nontronite, kaolinite, illite, beidellite. Local bacterial sulfate red...

We conducted microstructural and microchemical analyses of deformation bands in a forearc fold belt consisting the Eocene Urahoro Group located northern Japan. In study area, there was one flexure (or monocline) developed where pervasively occurred arkosic sandstone intercalated with mudstone coal layers. Deformation formed at maximum burial depth c. 1.5–2.5 km; this inferred from both thicknes...

The North Tianshan Belt (NTB) formed by the subduction and accretion of Junggar Ocean is a key area for reconstructing Paleozoic tectonic evolution southern Central Asian Orogenic (CAOB). Despite numerous studies, interpretation late NTB meets no consensus yet. We conducted field investigations LA-ICP-MS zircon U-Pb dating on metamorphic rocks from Julideneng Metamorphic Complex (JMC) in Harlik...

due to their widespread availability, sandstones are commonly used as a natural stone for buildings, monuments and sculptures. in thecurrent study, nine sandstone samples from the upper red formation (specified by the letters a, b, c, cg, s, s1, sh, tr and min)were studied from a petrophysical point of view and their durability was evaluated. then, their suitability as building stones wasassess...

The TCG consists of a basal pebble-conglomerate with distinctive black chert clasts overlain by sandstones interlayered with white-purple volcanic ash. All lithologies have experience an episode of post-deposition silicification. Petrographic analysis reveals sandstones are compositionally mature with high abundances of quartz and minor amounts of feldspar and muscovite or biotite mica. Most gr...

Established theory addresses the idea that herbivory can have positive feedbacks on nutrient flow to plants. Positive feedbacks likely emerge from a greater availability of organic carbon that primes the soil by supporting nutrient turnover through consumer and especially microbially-mediated metabolism in the detrital pool. We developed an entirely novel stoichiometric model that demonstrates ...

In order to reconstruct past variations in the aeolian dust (Kosa) contribution to the Japan Sea, and to establish a direct link between terrestrial and marine climatic records, we have applied statistical procedures to distinguish and quantify detrital subcomponents within the detrital fraction of the late Quaternary hemipelagic sediments in the Japan Sea. Q-mode factor analysis with varimax a...

Detritivory is the dominant trophic paradigm in most terrestrial, aquatic, and marine ecosystems, yet accurate measurement of consumer trophic position within detrital (="brown") food webs has remained unresolved. Measurement of detritivore trophic position is complicated by the fact that detritus is suffused with microbes, creating a detrital complex of living and nonliving biomass. Given that...