PAPER-III: SEDIMENTARY AND ORGANIC GEOCHEMISTRY
UNIT I: Introduction to sedimentary rocks, classification of sedimentary rocks, textures, structures, lithification and diagenesis. Chemical weathering, weathering reactions, changes in rock composition, sequence of silicate mineral alteration, agents of chemical weathering, dissolution of carbonates, hydrolysis of silicates.
UNIT II: Oxidation and reduction, redox reactions in the environment, balancing redox half reactions in the environment. Equation oxidation potentials and their relation to free energy, hydrogen ion activity (pH), limits of Eh and pH in natural environments, Eh-pH diagrams.
UNIT III: Deep Marine Sediments: formations of Deep sea sediments, redox environments, Organic matter, Interstitial water inputs to the ocean. Phosphatic nodules and ferromanganese nodules. Sub-Surface Sea Bed Deposits: Source rocks, Kerogen Types, and Hydrocarbon potential, Petroleum and natural gas deposits below the sea bed. Calcareous oozes, red clay deposits.
UNIT IV: Organic geochemistry: Naturally occurring organic matter, the carbon cycle, nutrient cycling, trace element cycles, organic geochemistry of fresh water and soils, organic geochemistry of sea water and marine sediments, coal, petroleum, origin of life.
REFERENCES
F.J.Pettijohn, (1984): Sedimentary rocks, III edition, CBS publishers
Konrad B.Krauskopf, (1995): Introduction to geochemistry III edition McGraw Hill company
Arthur H.Brownlow (1996): Geochemistry, Prentice Hall Inc
Brian Masson (1983) Principle of Geochemistry, 4th edition McGraw Hill company
Reference http://osmania.ac.in
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