Microsampling Device for Geochemical Analysis of Earth and Planetary Materials

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We can learn a lot about how the Earth, other planets and asteroids were formed and modified throughout their history by the careful study of minerals found in rock samples and meteorites. Most labs today do one of two things: crush up the rock and separate out the different minerals; or analyze the mineral grains in a polished rock surface using a laser or ion beam. The first method (called mineral separation) is the best for giving us the most detailed information, but it does not preserve how the mineral grains have grown together (the rock texture); the second method is less detailed, but it preserves the texture so that the information we get can be put into context. We propose to purchase a new type of equipment, called a micromill, that will allow us to drill out tiny samples of minerals within rocks. Because the samples are drilled out as powder, they can be analyzed using the best methods (the ones usually used with mineral separation); because the samples are removed directly from spots less than the width of a human hair instead of crushing up the rock, the rock texture is preserved. In this way the equipment bridges the gap between the two methods used in labs today, and makes new areas of research possible. The equipment will directly support the research programs of 5 researchers at two Alberta Universities, in everything from how diamonds, ore deposits and meteorites form, to ways of putting carbon back into the Earth's crust. The equipment will also be available to other researchers in other areas of study in Alberta and nationally.