...Nilima Dash; Bibhuranjan Nayak; Birendra Kumar Mohapatra Abstract Manganese mineralization in the Precambrian Gangpur Group of rocks in Sundargarh district of Odisha occur as pockets or small ore bodies associated with metapelites and metapsamites. Different varieties of hypogene metamorphic...

...Nilima Dash; B. K. Mohapatra Abstract: Shirozulite, ideally KMn 3 (AlSi 3 ) O 10 (OH) 2 , is recorded for the first time in metamorphosed manganese formation of Gangpur group in eastern India. It is associated with spessartine, jacobsite, calcite, rhodochrosite and muscovite which seemingly formed...

...B. R. Nayak; B. K. Mohapatra Abstract Pyrophanite is widely distributed in metamorphic, Mn-rich rock assemblages of the Gangpur Group, India. It occurs in two distinct habits: as an independent phase, and as an exsolved phase within hematite. The well developed large sized crystals coexist...

...B. K. Mohapatra; B. R. Nayak Abstract Manganite ?-MnOOH, in the manganese-rich rocks of Precambrian Gangpur Group, Sundargarh district, Orissa, shows dissimilar fabrics and belongs to three generations but has more or less similar chemical composition. It occurs as patchy inclusions, accicular...

...A. K. Chaudhuri; A. B. Pal Abstract Gangpur Group, an important Precambrian metasedimentary sequence near Rourkela in eastern India shows an easterly antiformal closure, but the northerly younging towards the core shown by cross beds in the southern limb proves large scale inversion. Three...

...A. K. Chaudhuri; A. B. Pal; A. Roy Abstract Three phases of folding have been detected in a large exposure along the Sapai lladi near Amaidegri (22°01': 84°08') in the Ghoriajhor manganese belt in the western part of the Gangpur Group. Reclined to inclined folds (F 1 ) plunging SSE have been...

...A. K. Chaudhuri; A. B. Pal Abstract Shape analysis of a large number of pebbles from a 60 km stretch of the basal Raghunathpalli conglomerate in the Gangpur Group in eastern India, indicates that a flattening strain on originally constricted pebbles during the earliest folding episode gave rise...

...Fig. 5. Tourmaline compositions from the Upper Bonai and Gangpur Group granitoids plotted in (a, b) triangular diagrams after Hawthorne & Henry ( 1999 ) and (c, d) the Al–Fe–Mg triangular diagrams. ...

... mineralisation environment. The Precambrian Gangpur basin comprising volcanic free sedimentary sequence is considered as a potential geological setting for hosting uranium mineralisation. The Gangpur basin with metasediments of low to medium metamorphic grade classified as the Gangpur Group are known for hosting...

... of the fault zone, para-metamorphites of the Gangpur group are exposed, within which are seen a number of isolated. linear, lensoid and irregular bodies of granite. The present paper deals with the study of fracture patterns in the southern 7 km portion of the fault zone and the surrounding metasediments...