Coal can act as a source rock for the generation f liquid hydrocarbons. The production of liquid hydrocarbons from coal is similar to that of type III kerogen, reflecting the origin of the organic matter in coal and type III kerogen, primarily from hydrogen -poor (lipid-poor) and oxygen rock vascular plants. Petroleum generation during coalification […]
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The Rock-Eval pyrolysis is a widely used geochemical technique in petroleum exploration and organic geochemistry. It provides valuable information on the quantity, type and thermal maturity of organic matter in sedimentary rocks, helping geologists asses hydrocarbon generation potential. Principles of Rock-Eval Pyrolysis Rock Eval pyrolysis involves heating a rock sample in an inert atmosphere and
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Gas Chromatography is a chromatographic technique used to separate volatile compounds and those which can vaporized by heat. If a mixture of compounds is analysed using GC system, each compound can be separated and quantified. It is useful and important because of following – Components of gas chromatography This is the overall main components of
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All the above terms may looks similar but are different. Let’s deep dive into them . Oil Shale Oil shale is a type of sedimentary rock that is rich in kerogen. Kerogen is a part of rock that breaks down and release hydrocarbon heated. Oil shale can be thought of as a precursor to oil
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Peedee Belemnite (PDB) is a well-known standard used in carbon and oxygen isotope studies. Originally derived from the fossilized remains of Belemnitella americana, a species of belemnite found in the Late Cretaceous peedee Formation in South Carolina, USA, PDB has played a crucial role in geochemistry, paleoclimatology and biogechemistry. Carbon Isotopes and PDB Carbon exists
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Common minerals : Diopside, Hedenbergite, Augite etc. Classes of the System Unit forms of Normal class : Form No. of faces Miller Indices Basal pinacoid‘c’ pinacoid 2 001 ‘a’ pinacoidFront pinacoidOrtho pinacoid 2 100 ‘b’ pinacoidSide pinacoidClino pinacoid 2 010 Prism 4 110 Hemi macrodome 02 (2) 101 Clinodome 4 011 Hemi pyramid 4 (2)
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Gondwana Supergroup is made up of continental sediments that were deposited in fluvial and lacustrine basins in different parts of the Indian Peninsula. This deposition begins from Late-carboniferous/ Early Permian (300 Ma) and continued until the Early Cretaceous Epoch (100 Ma). Lower part of the Gondwana sequences contain rich coal deposits. Barakar formation is the
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H2O and CO2 are the two most important components of fluids in the upper mantle and crust, and their solubilities in silicate melts control many processes like generation, migration, saturation and crystallization, exsolution of bubbles, polymerization and combinedly the volcanic eruption. Water (H2O) The hydrogen of the H2O molecule reacts with a bridging oxygen of
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On the basis of mineral replacement and intergrowths, four oxide series are recognized among the sandstones – Stages of diagenesis From the type of reaction and the principal sequence of occurence three stages of diagenesis are established as follows – Among sandstones, the progress of diagenesis may be arrested at either the locomorphic or phyllomorphic
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Rules of substitution Terminology related to partitioned between the solid & liquid phase Distribution coefficients and Geothermometers Distribution coefficient (D) = Cs/ Cl where, Cs = the concentration of a minor element in the crystal of a mineral Cl = the concentration of that element in the liquid from which the crystal formed under equilibrium
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