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The Region was set up during 1958 as Western Region at Nagpur and divided during 1988 into Western Region-I with headquarter at Nagpur and Western Region-II with headquarter at Baroda (now Vadodara). With the closure of Western Region-II at Vadodara, the Region was subsequently renamed as Central Region during 1994. The Region has residential quarters catering to the requirement of officers and staff.
(i) Archaean to Lower Proterozoic basement craton including Proterozoic granites of 2.2-2.5 b.y. age (Bundelkhand, Dongargarh and Malanjhkhand granites). Late Archaean to Early Proterozoic sediments are bounded by rift zones/ mobile belts, which are metamorphosed to greenschist facies. High-grade mobile belts related to lithospheric development, are characterized by high grade rocks of amphibolite facies to granulitic extending from eastern Madhya Pradesh to Chhotanagpur Plateau and are covered by younger sediments. Other groups of Lower Proterozoic rocks represent highly deformed volcano sedimentary sequences. Proterozoic Supracrustal belts of Kotri-DongargarhSupergroup, Sakoli Group, Sausar Group located on the west central part of Bastar craton and Mahakoshal Group form important tectono-metamorphic units.
(ii) Middle to Upper Proterozoic rift related sedimentary basins These were formed as a continental anorogenic environment related to extensional tectonic regime and include the following basins e.g. Abujhmar, Khairagarh, Indravati, Chhattisgarh, Vindhyan, Khariar, Ampani, Pakhal etc. Proterozoic basins which host major unconformity related deposits world over have extensively developed in Central India and nine out of fourteen such basins come under Central Region.
(iii) Gondwana sediments of Palaeozoic-Mesozoic Era which were deposited in intracratonic-rifted basins, occupy large parts of Central Region in Satpuda basin, Son-Mahanadi basin etc.
(iv) Deccan traps of Mesozoic Era They occupy nearly 60% of the area of the Region.
A major part of radiometric survey was confined to Proterozoic supracrustals and the crystallines. Some of the uranium deposits identified are:
Bodal: It is located in the Rajnandgaon district of Chhattisgarh.The host rocks are Proterozoic bi-modal volcanics. It is a metamorphite type of uranium deposit established over a strike length of 1000m with a vertical depth upto 400m. A total of 1530 tonnes U3O8 has been established in the deposit.
Jajawal: It is located in the Surajpur district of Chhattisgarh. The host rocks are Proterozoic crystallines. It is a metamorphite type of uranium deposit established in two sectors for 300m (Central sector) and 485m (Western sector) upto a maximum vertical depth of 400m. A total of 1438 tonnes U3O8 has been established. Other smaller uranium deposits identified are as follows.
| S. No. |
Location |
District |
Host Rock/ Basin |
| 1 |
Dumhath |
Surajpur, Chhattisgarh |
Proterozoic crystallines(CGGC) |
| 2 |
Dhabi |
Surajpur district of Chhattisgarh |
Syenites (CGGC) |
| 3 |
Bhandaritola |
Rajnandgaon district of Chhattisgarh |
Proterozoic Acid volcanics |
| 4 |
Mogarra |
Bhandara district,Maharashtra |
Khairagarh sandstones |
| 5 |
Kachhar-Dharangmau |
Betul district, Madhya Pradesh |
Motur sandstones |
Investigations in the Gondwana basins have resulted in locating uranium occurrences at few places e.g. Lalbarra (Mandla district, Madhya Pradesh), Polapathar, Mansinghpura, Kachhar-Dharangmau-Kalapani, Khapajhapari area (Betul district, Madhya Pradesh). Intensive sub-surface exploration in the area has demarcated 6 small lenses of sandstone hosted uranium mineralization controlled by NNW-SSE palaeo-channels in Motur Formation at kachhar Dharangmau area.
A number of radioactive anomalies associated with pegmatitic leucosome of migmatite of Chhotanagpur Granite Gneiss Complex (CGGC) located at Jhapar, Jaljalia, Naniyagarh, Kurludih, Kundru-Talkeshwarpur, Dumarpan and Baran River in North Surguja Shear Zone, Devri-Pakni, Jhor-Jirhat, Kansisot-Hari Pahar-Garia in Central Surguja Shear Zone and Chordhawa, Ghatbahra-Murmur, Sapalwa-Hiruwadoli in Tan Shear Zone. The areas are under intensive sub-surface exploration for Metamorphite-type uranium mineralisation. There are a number of Middle Proterozoic basins having unconformable contact with the Lower Proterozoic / Archaean basement, whose are considered potential locales for unconformity related uranium occurrences. With this concept in the backdrop, Chhattisgarh and Khairagarh basins have been taken up for intensive investigations.
The Region has the following analytical laboratories
Ground Calibration Pads for Gamma ray spectrometers
A unique facility, the only one of its kind in India, was established by AMD in the civil airport at Nagpur for calibrating gamma ray spectrometers both for airborne surveys and ground surveys. This facility has been constructed wholly indigenously, as per the specifications of IAEA and is serving as a national facility for calibration of radiometric instruments by various organisations of the country as well as universities.
Analytical laboratories
The Region is equipped with
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