Sukanta Goswami

Sakariya Mines and Minerals · Geology

The geochemical characterization of shale may imply the average crustal composition of provenance more reliably than any other detrital sediments. Shales of Proterozoic Vempalle Formation at different stratigraphic levels are categorized into four types based on texture, CaO contents, concentration of quartz-clay, grain size and sedimentary structu...

It is a Bengali paper on Gabon natural nuclear reactor. Promot mother tongue in science....

Sedimentary rock types and basin geometries are interrelated with characteristic tectonic settings. In fact, sedimentation pattern at central stable cratonic areas are not same as that on continental margins. Kaladgi-Badami (KB) basinal feldspathic arenite (i.e., arkose) dominated rocks contain more plagioclase than potassium feldspar unlike the op...

Structural fabrics of schist belt, gneiss, migmatites and younger granitoids are different. Various morphology of migmatites is recognized for the first time in the southern part of EDC along with gneiss. The younger granite plutons are examined from northern through central to southern part of EDC. The paleosome-dominated portions of migmatite wer...

The term ‘chert’ ideally refers to fine-grained siliceous (micro/cryptocrystalline) mineral and is also often used for rock with such siliceous mineral aggregate of chemical, biochemical, and organic origin. Petrologically, inorganic non-sedimentary origin or even volcanic derivatives formed by devitrification of metastable felsic volcanic glass ca...

International Geological Congress 20

International Geological Congress 2020

International Geological Congress 20

International Geological Congress

Organic matter (OM) is often found to be associated in many cases with uranium (U) mineralization displaying spatial, statistical or molecular relationships. The hydrocarbon (HC) system and uranium metallogeny often show geographic, geologic and temporal similarity, which indicates the biophile tendency of uranium. Search for either energy sources...

The southern basement of the Cuddapah Basin comprises the Dharwar Batholith and greenstone belt complex. Granitoids of the batholith exhibit extensive variation in terms of geomorphology, age, mineralogy, and micro/meso scale structures. The eastern part of Dharwar Craton along 13°50′ to 14°8′N latitude and 78°45′ to 79°05′E longitude was studied t...

Lithostructural mapping in any type of geological terrains like the younger Himalayan mountain or the older Archaean Cratons has always been an immensely helpful tool. There are some challenges for geologists in mapping certain geological terrain. Although the use of remote sensing, GIS and other feasible technology is enhancing day by day, accurat...

Fracture and fault zones can tap the uranium-bearing fluid and help to migrate into the structural trap where the hydrothermal fluids cool and precipitate the uranium mineral. Such a structural setting gives sufficient time to react the fluid with receptive country rocks. Fracture zones have played a major role in the mineralizing event in Ambakapa...

The basement complex in the south of Cuddapah basin around Shivaramapuram-Nutankalva area comprises granite gneiss and patches of greenstone belts, which are traversed by fractures trending E-W, N-S, NE-SW and NW-SE directions. The fractures are often intruded by younger basic intrusive rocks. Several NE-SW trending fracture zones with uranium mine...

Bimodal volcanism in the Cuddapah basin is associated with a cratonic rift setting. The Cuddapah basin consists of five sub-basins (viz., Papaghni, Nallamalai, Srisailam, Kurnool and Palnad) and a total thickness of *12 km sediments and associated bimodal volcanics. The oval-shaped gravity high observed over the Papaghni sub-basin is due to lopolit...

This contribution highlights the less widely known T. Sundupalle greenstone belt and surrounding granite–gneiss complexes. The greenstone belt trends NNW and comprises supracrustal assemblages with intense deformation. Four episodes of deformation events are revealed from this present structural study. Younger deformation episodes like igneous intr...

journal of applied geochemistry (Indian Society of Applied Geochemists) Print ISSN: 0972-1967

The Cuddapah Basin in southern India has a potential for uranium mineralization due to some favorable factors such as its temporal, stratigraphic and tectonic settings. Systematic exploration program conducted by the Atomic Minerals Directorate for Exploration and Research (AMD) within the Cuddapah Basin resulting in the recognition of distinct typ...

The Archaean rocks of the Dharwar Craton in Southern India form the basement of three Proterozoic basins i.e. Cuddapah, Bhima and Kaladgi. The East Dharwar Craton consists of ~3.1–2.5 Ga Archaean granite-gneiss, migmatites, schist belts and younger mafic dyke swarms, which form basement of Cuddapah and Bhima basin. Gneiss and migmatite are closely...

This contribution focuses on a few aspects starting with a field-based newly prepared map of the study area around the northern extreme of the Kadiri greenstone belt and the surrounding granitoids. After geological understanding the petrologic and geochemical analyses of samples reveal its tectonics. Field setting and geochemistry connotes ocean-co...

The Cuddapah basin consists of generally well-preserved Palaeoproterozoic–Neoproterozoic sedimentary and associated volcanic rocks. The detailed lithological studies of sedimentary rocks of Vempalle Formation from the narrow linear belt of 15 km, in the southern margin, show the occurrence of layered gypsum in the cherty dolostone–shale intercalate...

Carbonate sedimentary rocks like limestones, dolomites are considered to contain less uranium among all the rocks of earth's crust due to the inhibitory effects of carbonate and bicarbonate ions and oxidizing conditions of precipitation. These are the factors responsible to keep uranium in solution. Dolostone of Vempalle Formation around Tummalapal...

The felsic volcanics, tuff and volcaniclastic rocks within the Tadpatri Formation of Proterozoic Cuddapah basin are not extensively studied so far. It is necessary to evaluate the extrusive environment of felsic lavas with associated ash fall tuffs and define the resedimented volcaniclastic components. The spatial and temporal bimodal association w...

Systematic structural observations in field outcrops can give clues to interpret orogenic events. Deformational structures studied in basement complexes as well as Cuddapah basinal sedimentary rocks indicate at least three events. The formation of N–S trending greenstone belts on gneissic basement complex is related to the oldest Kenoran orogeny. T...

The lower stratigraphic part of the Cuddapah basin is marked by mafic and felsic volcanism. Tadpatri Formation consists of a greater variety of rock types due to bimodal volcanism in the upper part. Presence of bimodal volcanism is an indication of continental rift setting. Various genetic processes involved in the formation of such volcanic sequen...

Plate tectonic activity has played a critical role in the development of petrotectonic associations in the Kadiri schist belt. The calc alkaline association of basalt, andesite, dacite and rhyolite (BADR) is the signature volcanic rock suite of the convergent margin. The N-S belt has gone below the unconformity plane of Cuddapah sediments. In the n...

Sedimentary structures have their potential usefulness in paleocurrent analysis and interpretation of siliciclastic shallow marine environment. These interesting features of sedimentary rocks, such as parallel bedding, cross bedding, ripples, and mud cracks as well as synaeresis cracks, are best studied in the field. They are formed by a variety of...

Dolostone of Vempalle Formation near Tummalapalle hosts large uranium deposit (>100,000 tonnes with an average grade of 0.045%U3O8). It is a unique type of uranium deposit because carbonate formations have been considered to be among the least uraniferous of all the rocks of the Earth’s crust due to mobility of uranium in aqueous fluid in the prese...

Journal of Applied Geochemistry

Fault slip can perturb the local surrounding stress field in a manner that controls the orientations of induced secondary structures for example, joints. However, the angle between joints and faults is also influenced by the remote stress state, and is particularly sensitive to the ratio of fault-parallel to fault-perpendicular stress. As this rati...

Epigenetic vein type uranium mineralization is generally associated with or hosted by evolved felsic igneous rocks and some of which are peralkaline. Fracture controlled uranium mineralizations have always been highlighted for high grade deposit. The ENE-WSW trending fracture zone reported earlier for uranium mineralization of Gondipalli area is ch...

The Ramagiri schist belt is about 80km long 2-4 Km wide North-South trending belt dominated by metavolcanic rocks of mainly tholeiitic composition. It is one of the important gold bearing schist belts in the eastern Dharwar Craton located in Anantapur district of Andhra Pradesh. The area is composed of three major rock types; viz. (1) Archaean gnei...

Poster

Nodular cherts in Vempalle dolostone of Papaghni Group within Cuddapah Supergroup, A.P., India, indicate mixed meteoric-marine coastal systems. The field relations of the chert nodules with the host dolostone and evidence on polished hand-specimens clearly demonstrate that the cherts are of secondary origin as they cross cut bedding, laminations an...

मध्य-प्राग्जीव कडप्पा द्रोणी के दक्षिण-पश्चिमी हिस्से में प.ख.नि. द्वारा अन्वेषण के दौरान वेमपल्ली डोलोस्टोन में युरेनियम भंडार की खोज की गयी है। वेमपल्ली डोलोस्टोन के शैलिकीय अध्ययन से इनमे एनहाइड्राइट की मौजूदगी का पता चला है। एनहाइड्राइट के गठन ने डोलोमिटाइजेशन में एक प्रमुख भूमिका निभाई है। डोलोस्टोन में इसकी उपस्थिति ने डोलोमाइट के गठन में वाष...

Hindi paper on FTIR of Vempalle dolomite