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

Gold Grains in Fe-Rich Tholeiitic Lava Flows from Amarkantak in the Eastern Deccan Volcanic Province, India


Affiliations
1 Department of Geology, University of Delhi, Delhi- 110 007, India
2 ITMMEC, IIT, Delhi - 110 016, India
 

   Subscribe/Renew Journal


Disseminated microscopic gold grains, measuring 8-12 microns across and possessing a fineness of 950 to 960 have been observed in the quartz normative tholeiitic lava flows from the Amarkantak region of the Eastern Deccan Volcanic Province. High temperature of equilibration (1060-1470°C) and very low oxygen fugacity (<5) as determined from the co-existing ulvospinel-magnetite and ilmenite-haematite pairs are proposed to be the controlling factors for the occurrence of gold in these volcanics.
Subscription Login to verify subscription
User
Notifications
Font Size

Abstract Views: 65

PDF Views: 45




  • Gold Grains in Fe-Rich Tholeiitic Lava Flows from Amarkantak in the Eastern Deccan Volcanic Province, India

Abstract Views: 65  |  PDF Views: 45

Authors

J. P. Shrivastava
Department of Geology, University of Delhi, Delhi- 110 007, India
S. K. Pattanayak
Department of Geology, University of Delhi, Delhi- 110 007, India
Chatar Singh
ITMMEC, IIT, Delhi - 110 016, India

Abstract


Disseminated microscopic gold grains, measuring 8-12 microns across and possessing a fineness of 950 to 960 have been observed in the quartz normative tholeiitic lava flows from the Amarkantak region of the Eastern Deccan Volcanic Province. High temperature of equilibration (1060-1470°C) and very low oxygen fugacity (<5) as determined from the co-existing ulvospinel-magnetite and ilmenite-haematite pairs are proposed to be the controlling factors for the occurrence of gold in these volcanics.