Diamonds

Autores: 
Herman Grutter, Cliff Revering
Categoría: 
Geology

The development of resource-stage diamond projects is materially constrained by the time and cost involved in bulk sampling (or trial mining) campaigns that serve to demonstrate the (macro)diamond grade of the deposit. Comparatively inexpensive assay data for (micro Read more... about Benchmarked Macrodiamond grade estimates from microdiamond data

Autores: 
Wayne Barnett, Michael Stubley, Casey Hetman, Ron Uken, Chris Hrkac, Tom McCandless
Categoría: 
Geology

The Kennady North Project kimberlites (Northwest Territories of Canada) comprises multiple shallow dipping dykes and several volcaniclastic bodies that have an unusual shallow plunging geometry and complex "pipe" shapes that are termed chonoliths. The detailed Read more... about Kelvin and Faraday kimberlite emplacement geometries and implications for subterranean magmatic processes

Autores: 
Jarek Jakubec, Casey Hetman
Categoría: 
Geology, Mining

Autores: 
Casey Hetman, Barbara Scott Smith, Jock Robey, Teboho Nkotsi, Mohapi Mohapi, Thabang Mohapi
Categoría: 
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

Autores: 
Jarek Jakubec, R. Woodward, B. Boggis, L. Clark, P. Lewis
Categoría: 
Mining

Primary diamond deposits have been mined on an industrial scale only within the past 150 years, mainly as open pit operations. Underground mining of these deposits was implemented only within the second half of the 20th century in South Africa and over the last 50 years, a relatively large Read more... about Underground Mining at Ekati and Diavik Diamond Mines

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