The mineralogy and geochemistry of Paleocene shales and interbedded siltstones in the southwestern of Ahar town (NW Iran) were studied by optical microscopy, XRD, SEM, XRF, and ICP-MS techniques. The mineralogical composition, mainly characterized by calcite, quartz, feldspar, dolomite, muscovite, magnesiohornblende, chlorite, illite, montmorionite, palygorskite, and koninckite, suggests relati...

The gypsum mineralization occurred in the form of Satin Spar and Selenite in the south and southwest of the Fars province in the folded Zagros zone. In this region, Satin Spar mineralization has been formed as stratiform between the red marl and siltstone units of Late Miocene–Pliocene in Agha Jari, Bakhtiari, and the Gachsaran formations. The reserves of Satin Spar in this area are at least 20...

The effects of geological conditionwere assessed on density of Soil Organic Carbon (SOC) and Nitrogen (N)in a sequence of hillslope landscape, derived from different lithology i.e. loess deposit, reworked loess, marl with mixed siltstone and shale, reddish brown clay deposits and older loess in the semiarid area of northern Iran. However, other factors can influence SOC and N density such as la...

The present study was carried out to determine the possible origins of sediments entering Taleghan Dam in northern part of Iran, in order to avoid further sedimentation and helping in extension of the useful life of the proposed dam. This was performed by XRD analysis. To do so, first of all, sediment sampling points were positioned along the Taleghan River. The collected samples, after coding,...

The lithology and lithofacies assemblage of shale are highly complex heterogeneous in the continental formations due to rapid changes sedimentary environment source material, complicating evaluation oil enrichment areas, such as member 3 Shahejie Formation Qikou sag, Bohaibay Basin, China. We used core observations descriptions well F39 × 1 performed X-ray diffraction, scanning electron microsc...

In this paper, taking the shale of Chang 7-Chang 9 oil formation in Yanchang Formation southeastern Ordos Basin as an example, through study heterogeneity characteristics, starting from preprocessing supervision data set, a logging interpretation method total organic carbon content (TOC) on lithofacies-based Categorical regression model (LBCRM) is proposed. It show that: 1) Based core observati...

Fine-grained strata deposited on the Eastern Siberian craton are predominantly considered to mainly consist of Neoproterozoic sandstones. Clastic rocks near unconformity border Ediacaran and Riphean represented by sandstone siltstone layers with thicknesses several tens meters, belonging Nepa, Tira, Byuk horizons in Nepa–Botuoba region. These sandstones have features characteristic aeolianites ...

The oil expulsion efficiency and retention of shale affect the enrichment preservation oil. Two series semi-closed hydrous pyrolysis experiments were performed under in situ geological conditions on a Paleogene sample as comparable analog to evaluate generation potential Funing Formation Subei Basin. results show that 1) oil-generation capacity evolution different lithological combination sourc...