Kimberlite

Author(s): 
Casey Hetman, Barbara Scott Smith, Jock Robey, Teboho Nkotsi, Mohapi Mohapi, Thabang Mohapi
Category: 
Geology

The Letšeng Diamond Mine comprises two adjacent kimberlites, the Main and Satellite pipes. Very low grade and low frequency of high value stones preclude use of standard evaluation methods, increasing the need for high confidence geology models. New results of drillcore investigations, including Read more... about Letšeng Diamond Mine, Lesotho: A Variant of Kimberley-type Pyroclastic Kimberlite Emplacement

Author(s): 
J.L. White, R.S.J. Sparks, K. Bailey, W.P. Barnett, M. Field, L. Windsor
Category: 
Geology

Field relations, petrography and bulk rock geochemistry constrain the emplacement mechanisms and petrogenesis of a kimberlite sill complex exposed in water tunnels at Wesselton Mine, Kimberley. The sill complex, together with associated dykes, is precursor to the main Wesselton pipe and contains Read more... about Kimberlite Sills and Dykes Associated with the Wesselton Kimberlite Pipe, Kimberly, South Africa

Author(s): 
Wayne Barnett, Stephan Kurszlaukis, Mark Tait, Paul Dirks
Category: 
Geology

Current kimberlite pipe development models strongly advocate a downward growth process as the pipe cuts down onto its feeder dyke by means of volcanic explosions (e.g. Lorenz, 1975; Sparks et al., 2006). Evidence is presented from a detailed study of the K08 pipe within the Cambrian Venetia Read more... about Upward Ancillary Kimberlite Pipe Growth in the Venetia Cluster

Author(s): 
Wayne Barnett, S. Kurszlaukis, M. Tait, P. Dirks
Category: 
Geology

Current kimberlite pipe development models strongly advocate a downward growth process with the pipe cutting down onto its feeder dyke by means of volcanic explosions. Evidence is presented from the K08 kimberlite pipe in Venetia Mine, South Africa, which suggests that some pipes or sub- Read more... about Venetia K08 Pipe Development

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