Late Permian coal deposits are widely distributed throughout southwestern China. This paper describes the petrological composition of last seam in Longmendong section Emeishan area during latest Changhsingian (Permian) and records important information regarding evolution mass extinction event that occurred at end Permian. The results show dominant maceral group is vitrinite, followed by liptin...

Abstract This paper presents organic geochemical evidence pointing to the occurrence of wildfire events at Triassic–Jurassic boundary in Central Iran. The studied outcrop section (the Kamarmacheh Kuh section) is comprised Upper Triassic Nayband Formation which passes conformably into Lower Jurassic Ab-e-Haji with no sharp boundary. Organic petrographical studies reveal a higher concentration se...

In this study, we propose a predictive model for maceral discrimination based on Raman spectroscopic analyses of dispersed organic matter. micro-spectroscopy was coupled with optical and Rock-Eval pyrolysis set seven samples collected from Mesozoic Cenozoic successions the Outer sector Carpathian fold thrust belt. Organic petrography evidence type II/III kerogen complex organofacies composed by...

Outcrop samples were collected from Dukku area for the purpose of subjecting them to palynological analysis in order determine relative age Gwandu Formation and palaeoenvironment deposition deposit. Field laboratory methods carried out obtain lithological sequence description outcrop. The obtained went through processes acid digestion with hydrochloric acid, hydrofluoric separation macerals by ...

The estimation of the degree carbonification coals can be investigated using Raman microspectroscopy applied for analysis grains selected macerals (altered remains organic particles). This approach allows best control analyses such as precise selection and orientation maceral to analysed. On other hand, miniaturized, especially handheld spectrometers typically offer a significantly less control...

Fifty-four coal clast samples in the siliciclastic rocks (e.g., sandstone and conglomerate) were collected from cores of two-deep research wells (K20H K20K) drilled at Kozlu coalfield Zonguldak Basin, for first time, they evaluated using mineralogy by XRD SEM-EDX random vitrinite reflectance (%Rr) measurements order to find out their origin timing. Petrographic observations on polish surfaces s...

Abstract In this study the hydrocarbon generation potential of coal and coaly shale samples collected from mines in Attock-Cherat Range Pakistan is optically analytically evaluated. These samples, representing Paleocene Hangu Formation, are analyzed across a range thermal maturity stages to understand their potential. The visual examination maceral type values vitrinite reflectance have been co...

Phosphorus contents of coal from around the world vary although there is a tendency for Permian coals from India and Australia, and Cretaceous coals from Western Canada to have more phosphorus than Carbcmiferous coals from Europ+ and USA (Table 1). This may be because of the evolution of vegetation type over geological time or because of the conditions in the coal swamps. Data presented here su...