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MANGANESE ORE OF SOUTH‐INDIA AND ITS MAGNETIC PROPERTIES *)
Author(s) -
BHIMASANKARAM V. L. S.,
RAO B. S. R.
Publication year - 1958
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1958.tb01640.x
Subject(s) - manganese , pyrolusite , mineralogy , geology , magnetic anomaly , magnetometer , geochemistry , metallurgy , materials science , magnetic field , geophysics , physics , quantum mechanics
A bstract The Kodur Manganese belt has been surveyed with a vertical magnetometer. It was generally observed that both high positive and negative anomalies were associated with some of the existing ore bodies. Other large manganese ore deposits gave little or no magnetic anomalies. Further it was observed that both types of manganese ore deposits giving rise to large and little magnetic anomalies, contained similar percentages of manganese and iron. In view of these discrepancies, an extensive study of the magnetic properties of these manganese ores was taken up. The results of these measurements showed that the susceptibilities of the manganese ore samples collected vary over a wide range. It was observed that the high susceptibilities are associated with samples containing manganmagnetite and vredenburgite, whereas samples rich in psilomelane and pyrolusite possess low susceptibilities. From the chemical analysis, normative values of manganmagnetite and vredenburgite–with a general formula of (Mn.Fe) 3 O 4 – were calculated and a linear relationship could be established between these normative values and susceptibilities.