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2. Mineral resource estimation - Wikipedia

   en.wikipedia.org/wiki/Mineral_resource_estimation

   Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.

3. Hudson's equation - Wikipedia

   en.wikipedia.org/wiki/Hudson's_equation

   K D = around 3 for natural quarry rock; K D = around 10 for artificial interlocking concrete blocks; S r = (ρ r / ρ w is the relative density of rock, i.e. (ρ r / ρ w - 1) = around 1.58 for granite in sea water; ρ r and ρ w are the densities of rock and (sea)water (-) θ is the angle of revetment with the horizontal

4. Core recovery parameters - Wikipedia

   en.wikipedia.org/wiki/Core_recovery_parameters

   Rock-quality designation (RQD) is a rough measure of the degree of jointing or fracture in a rock mass, measured as a percentage of the drill core in lengths of 10 cm or more. High-quality rock has an RQD of more than 75%, low quality of less than 50%. Rock quality designation (RQD) has several definitions.

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   Accused rapist rapper Sean “Diddy” Combs hired men to patrol his parties and recruit young women for “intimate” time with him — claiming it was “an honor” to be asked, a targeted ...

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7. Normative mineralogy - Wikipedia

   en.wikipedia.org/wiki/Normative_mineralogy

   Normative mineralogy is an estimate of the mineralogy of the rock. It usually differs from the visually observable mineralogy, at least as much as the types of mineral species, especially amongst the ferromagnesian minerals and feldspars, where it is possible to have many solid solution series of minerals, or minerals with similar Fe and Mg ratios substituting, especially with water (e.g ...