Mineral Prospecting Manual

Mineral Prospecting Manual

4.11 - 1251 ratings - Source

Either hand auger drills (a#39;Helixa#39; type) or motor-driven auger drills (eg Stihl O8S model) are used. The a#39;Helixa#39; type (Appendix 1, Chapter 3) is a spiral ... can drill holes to 20m deep with a diameter of 90 to 250mm. Samples come up to the surfaceanbsp;...

Title:Mineral Prospecting Manual
Author:Jean Morer
Publisher: - 1987


You Must CONTINUE and create a free account to access unlimited downloads & streaming