Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Open Access Open Access  Restricted Access Subscription Access
Open Access Open Access Open Access  Restricted Access Restricted Access Subscription Access

Magnetite Pebbles in the Conglomerate of Silpunji Area, Sundargarh District, Orissa


Affiliations
1 Department of Mining Engineering, Regional Engineering College, Rouikela, Sundargarh, India
2 Department of Earth Sciences, Sambalpur University, Jyoti Vihar, Burla, Sambalpur, India
 

   Subscribe/Renew Journal


An unusual occurrence of magnetite pebbles of variable shapes and sizes is recorded in the matrix supported conglomerate band exposed around Silpunji, in the eastern part of Sundargarh district, Orissa. The metasediments (Chandiposh Group) with which the paraconglomerate band is associated, is intruded by 2809±12 Ma old Tamperkola Granite which suggests the conglomerate to be of Archaean period. Although Koira (Iron Ore) Group is very close to the Chandiposh Group, it is unlikely to be the source area for the magnetite pebbles, as Banded Iron Formation of Koira (Iron Ore). Group is dominantly haematitic in composition. The magnetite pebbles thus indirectly suggest the existence of a rock sequence other than Koira (Iron Ore) Group having iron ore bearing lithogic unit.
Subscription Login to verify subscription
User
Notifications
Font Size

Abstract Views: 185

PDF Views: 133




  • Magnetite Pebbles in the Conglomerate of Silpunji Area, Sundargarh District, Orissa

Abstract Views: 185  |  PDF Views: 133

Authors

Brahmananda Naik
Department of Mining Engineering, Regional Engineering College, Rouikela, Sundargarh, India
Ashutosh Naik
Department of Earth Sciences, Sambalpur University, Jyoti Vihar, Burla, Sambalpur, India

Abstract


An unusual occurrence of magnetite pebbles of variable shapes and sizes is recorded in the matrix supported conglomerate band exposed around Silpunji, in the eastern part of Sundargarh district, Orissa. The metasediments (Chandiposh Group) with which the paraconglomerate band is associated, is intruded by 2809±12 Ma old Tamperkola Granite which suggests the conglomerate to be of Archaean period. Although Koira (Iron Ore) Group is very close to the Chandiposh Group, it is unlikely to be the source area for the magnetite pebbles, as Banded Iron Formation of Koira (Iron Ore). Group is dominantly haematitic in composition. The magnetite pebbles thus indirectly suggest the existence of a rock sequence other than Koira (Iron Ore) Group having iron ore bearing lithogic unit.