Abstract. We report a new sampling strategy for collecting representative samples of drill core. By splitting the core with diamond saw into working and archive halves, cuttings constitute “channel” sample, best subsample from which to obtain an average mineralogical geochemical composition apply this procedure lower oceanic crust in Hess Deep obtained during Expedition 345 Integrated Ocean Dri...

This study deals with application of artificial neural networks (ANNs) on grade control at mine sites inputting both geological and geotechnical variables. Case study is Chapada copper-gold deposit (Goiás, Brazil), located in the neoproterozoic Chapada-Mara Rosa volcano-sedimentary sequence. Ore is closely related to hydrothermal alteration, structurally controlled. The geological and geotechni...

Optical and medical devices require microdrilling of holes on glass. Brittle fracture occurs during the drilling. Cone and radial cracks are generated due to impact load and walking when a drill hit a glass to make a hole. To produce good holes without cracks and fracture, a condition monitoring of glass drilling processes is required. In this paper, to develop a costeffective direct monitoring...

We propose that a new type of drill, alternately known as a Fast Mechanical-Access Drill, or Coiled Tubing Drill for Ice (CTDI), be developed for polar research. The proposed drill is similar in concept to the latest coiled tubing (CT) drills used for commercial oil and gas development. CT drills use a metal or advanced-composite tube to deliver fluid downhole to a hydraulic motor that drives a...

A 66-year-old woman presented with intermittent paraparesis and generalized tonic-clonic seizure. Cerebral angiography demonstrated dural arteriovenous fistula (AVF) involving superior sagittal sinus (SSS), which was associated with SSS occlusion on the posterior one third. The dural AVF was fed by bilateral middle meningeal arteries (MMAs), superficial temporal arteries (STAs) and occipital ar...

As part of a study of exposure to and risk from potential emissions of asbestos from the Southdown Quarry (now Cemex), a series of rock core segments representing each of multiple depths were acquired from historical drill core samples of Quarry material provided by the quarry. The samples were then analyzed for the determination of asbestos and related structures. Results are summarized below ...