Results 1 to 10 of about 395 (139)
Origin and Distribution of Large Asphaltite in South China [PDF]
ACS Omega, 2020 Large quantities of Triassic solid asphaltite were discovered in the Guangyuan area, northwest Sichuan. The asphaltite is formed in layers with a vertical thickness between 0.3 and 2.8 m and is stably distributed with intrusive contact with surrounding rocks. This study aims on the genesis and distribution of asphaltite through trace element, biomarker,
Guangyou Zhu +7 more
doaj +4 more sources
Infrared Spectral Classification of Natural Bitumens for Their Rheological and Thermophysical Characterization [PDF]
Molecules, 2023 Natural bitumens consist of many molecules whose chemical composition depends on the oilfield and determines the physicochemical properties of the bitumens as materials.
Anastasiya Y. Yadykova +2 more
doaj +2 more sources
Lower cretaceous avian-dominated, theropod, thyreophoran, pterosaur and turtle track assemblages from the Tugulu Group, Xinjiang, China: ichnotaxonomy and palaeoecology [PDF]
PeerJ, 2021 Rich tetrapod ichnofaunas, known for more than a decade, from the Huangyangquan Reservoir (Wuerhe District, Karamay City, Xinjiang) have been an abundant source of some of the largest Lower Cretaceous track collections from China.
Lida Xing +12 more
doaj +3 more sources
Organoporosity Evaluation of Shale: A Case Study of the Lower Silurian Longmaxi Shale in Southeast Chongqing, China [PDF]
The Scientific World Journal, Volume 2014, Issue 1, 2014., 2014 The organopores play an important role in determining total volume of hydrocarbons in shale gas reservoir. The Lower Silurian Longmaxi Shale in southeast Chongqing was selected as a case to confirm the contribution of organopores (microscale and nanoscale pores within organic matters in shale) formed by hydrocarbon generation to total volume of ...
Fangwen Chen +3 more
wiley +2 more sources
DETERMINATION OF VANADIUM IN TURKISH ASPHALTITES; pp. 331–338 [PDF]
Oil Shale, 2010 Vanadium is found in many rocks and minerals, including asphaltite. Asphaltite is one of the naturally occurring black, solid bitumens, which are soluble at heating in carbon disulfide and fuse.
I. AYDIN +3 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 24, Issue 5, May 2023., 2023 Abstract Recent studies have shown that biosignatures of ancient microbial life exist in mineral coatings in deep bedrock fractures of Precambrian cratons, but such surveys have been few and far between. Here, we report results from southwestern Sweden in an area of 1.6–1.5 Ga Paleoproterozoic rocks heavily reworked by the 1.14–0.96 Ga Sveconorwegian ...
Henrik Drake +4 more
wiley +1 more source
Environmental Toxicology and Chemistry, Volume 42, Issue 1, Page 7-18, January 2023., 2023 Abstract In the present study, we investigated the possibility of identifying the source oils of exposed fish using ratios of bicyclic sesquiterpane (bicyclane) chemical biomarkers. In the event of an oil spill, identification of source oil(s) for assessment, or for litigation purposes, typically uses diagnostic ratios of chemical biomarkers to produce
Francis D. Spilsbury +6 more
wiley +1 more source
ORGANIC GEOCHEMICAL CHARACTERISTICS OF ŞIRNAK ASPHALTITES IN SOUTHEAST ANATOLIA, TURKEY; pp. 58–83 [PDF]
Oil Shale, 2010 In this study, the organic geochemical properties of asphaltites in Åırnak region in Southeast Anatolia are given in detail. Total organic carbon, Rock-Eval pyrolysis, gas chromatography of saturated fractions, gas chromatoÂgraphy-mass spectrometry ...
O. KAVAK +3 more
doaj +1 more source
Geochemical research of asphaltite formation in the Orenburg region [PDF]
E3S Web of Conferences, 2019 The results of the studies of the physicochemical properties and genesis of asphaltites from the deposits of the Orenburg region are considered. Based on the data of a study on the distribution of hydrocarbon biomarkers (n-alkanes, isoprenanes, steranes,
Zakharchenko Maria +2 more
doaj +1 more source