Dr. V. Balaram (DOB 1st June, 1951) received M.Sc. (1974) and Ph.D. degrees (1979) in Chemistry from the Andhra University, Visakhapatnam, India. He is Farmer Emeritus Scientist and Chief Scientist
... TIMING OF GOLD MINERALIZATION IN THE HUTTI GOLD DEPOSIT, DHARWAR CRATON, SOUTH INDIA. D. Srin... more ... TIMING OF GOLD MINERALIZATION IN THE HUTTI GOLD DEPOSIT, DHARWAR CRATON, SOUTH INDIA. D. Srinivasa Sarma {dagger} ... DSS, MRM, and VB thank ML Patil and P. Srinivas for their valuable guidance in collecting samples at the HGML underground mines. ...
A rapid and sensitive method was described for the determination of various metallic constituents... more A rapid and sensitive method was described for the determination of various metallic constituents in nutritional supplements and multivitamin drug formulations by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). NIST 1643b standard water reference sample was analyzed and the values were in good precision and comparable accuracy with the certified values indicating the reliability of the ICP-MS measurements.
The importance of platinum group elements (PGE) in modern technological applications as well as i... more The importance of platinum group elements (PGE) in modern technological applications as well as in earth science studies is highlighted. These elements provide a unique view of how the early Earth's mantle and crust prevailed and the mysteries of Earth's formation, dating back to 4.5 billion years. A few aspects on how PGE are used to derive important conclusions pertaining to the understanding of earth's interior are discussed with inputs from various latest studies. Minerals such as sperrylite, cobaltite, pentlandite, chalcopyrite, and another mineral containing iridium and tungsten have been identified by SEM-EDS by our group in the chromite and sulfide-bearing ultramafic rocks of Madawara Igneous Complex, Lalitpur district, Uttar Pradesh. In another interesting study, very high concentrations of PGE, especially that of platinum (up to 1 μg/g), were identified in the ferromanganese crusts of the Afanasy-Nikitin Seamount (ANS) in the Eastern Equatorial Indian Ocean. Surface oxidation of seawater is believed to be involved in this extreme enrichment of Pt in ferromanganese crusts. These could become resources of platinum in future. Finally, a discussion on the high concentrations of iridium found in a particular sediment horizon of 65 m. y. at various places around the planet including Deccan basalts which played an important role in studies linking the impact of an extraterrestrial object to the mass extinctions at the K-T boundary is presented. Scientific data from different studies, especially related to the iridium anomaly, adds weight to the theory that the K-T extinction was caused by a massive asteroid fragmenting and hitting several locations around the Earth at K-T boundary.
The concentration levels and distribution features of the platinum group elements (PGE) in black ... more The concentration levels and distribution features of the platinum group elements (PGE) in black shales with high carbon content from the Bureya Massif, Far East Russia are discussed. This study compares PGE and gold (Au) values in black shale ores from the eastern Bureya Massif. Mineralogical studies using SEM-EDS on PGE-bearing inclusions in black shales reveal that they always contain O and C along with Pt, Pd, Ir and Os. It is believed that PGE are present in the form of organometallic compounds which are extremely resistant to any exposure, including acid dissolution and fire assay procedures. There is a lot of variation in the concentration values obtained using different analytical methods. Observations, problems and possible causes for the erratic and low recoveries of Au and PGE in the highly carbonaceous black shales are discussed.
... Geochemistry and petrogenesis of lamprophyres and associated dykes from Elchuru, Andhra Prade... more ... Geochemistry and petrogenesis of lamprophyres and associated dykes from Elchuru, Andhra Pradesh, India. Auteur(s) / Author(s). MADHAVAN V. ; MALLIKHARJUNA RAO ; BALARAM V. ; RAMESH KUMAR ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). ...
... TIMING OF GOLD MINERALIZATION IN THE HUTTI GOLD DEPOSIT, DHARWAR CRATON, SOUTH INDIA. D. Srin... more ... TIMING OF GOLD MINERALIZATION IN THE HUTTI GOLD DEPOSIT, DHARWAR CRATON, SOUTH INDIA. D. Srinivasa Sarma {dagger} ... DSS, MRM, and VB thank ML Patil and P. Srinivas for their valuable guidance in collecting samples at the HGML underground mines. ...
A rapid and sensitive method was described for the determination of various metallic constituents... more A rapid and sensitive method was described for the determination of various metallic constituents in nutritional supplements and multivitamin drug formulations by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). NIST 1643b standard water reference sample was analyzed and the values were in good precision and comparable accuracy with the certified values indicating the reliability of the ICP-MS measurements.
The importance of platinum group elements (PGE) in modern technological applications as well as i... more The importance of platinum group elements (PGE) in modern technological applications as well as in earth science studies is highlighted. These elements provide a unique view of how the early Earth's mantle and crust prevailed and the mysteries of Earth's formation, dating back to 4.5 billion years. A few aspects on how PGE are used to derive important conclusions pertaining to the understanding of earth's interior are discussed with inputs from various latest studies. Minerals such as sperrylite, cobaltite, pentlandite, chalcopyrite, and another mineral containing iridium and tungsten have been identified by SEM-EDS by our group in the chromite and sulfide-bearing ultramafic rocks of Madawara Igneous Complex, Lalitpur district, Uttar Pradesh. In another interesting study, very high concentrations of PGE, especially that of platinum (up to 1 μg/g), were identified in the ferromanganese crusts of the Afanasy-Nikitin Seamount (ANS) in the Eastern Equatorial Indian Ocean. Surface oxidation of seawater is believed to be involved in this extreme enrichment of Pt in ferromanganese crusts. These could become resources of platinum in future. Finally, a discussion on the high concentrations of iridium found in a particular sediment horizon of 65 m. y. at various places around the planet including Deccan basalts which played an important role in studies linking the impact of an extraterrestrial object to the mass extinctions at the K-T boundary is presented. Scientific data from different studies, especially related to the iridium anomaly, adds weight to the theory that the K-T extinction was caused by a massive asteroid fragmenting and hitting several locations around the Earth at K-T boundary.
The concentration levels and distribution features of the platinum group elements (PGE) in black ... more The concentration levels and distribution features of the platinum group elements (PGE) in black shales with high carbon content from the Bureya Massif, Far East Russia are discussed. This study compares PGE and gold (Au) values in black shale ores from the eastern Bureya Massif. Mineralogical studies using SEM-EDS on PGE-bearing inclusions in black shales reveal that they always contain O and C along with Pt, Pd, Ir and Os. It is believed that PGE are present in the form of organometallic compounds which are extremely resistant to any exposure, including acid dissolution and fire assay procedures. There is a lot of variation in the concentration values obtained using different analytical methods. Observations, problems and possible causes for the erratic and low recoveries of Au and PGE in the highly carbonaceous black shales are discussed.
... Geochemistry and petrogenesis of lamprophyres and associated dykes from Elchuru, Andhra Prade... more ... Geochemistry and petrogenesis of lamprophyres and associated dykes from Elchuru, Andhra Pradesh, India. Auteur(s) / Author(s). MADHAVAN V. ; MALLIKHARJUNA RAO ; BALARAM V. ; RAMESH KUMAR ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). ...
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