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Information about Geochemistry

Geochemistry at a Regional Scale
A key factor in the golden age of mineral discoveries in the 1960’s and 1970’s was the application of regional scale geochemical surveys. At that time, it was possible to analyze only a handful of elements (Au, Cu, Pb, Zn, As) at commercial assay laboratories. The assay techniques available at the time were not that sensitive for the purpose for which they were being used, and it is only the really obvious mineral systems that would have been detected. Nevertheless, this was a hugely successful period of exploration ... [ more ]

Near-Mine Geochemistry
Are you one of those companies that assays a multielement geochemical suite with 40 or more elements, then then only ever looks at the assays for ore metals? All of the elements in the multielement packages contain information about the nature of the host rock, the alteration mineralogy and the pathfinder element haloes, as well as the distribution of the ore metals ... [ more ]

SWIR Spectral Mapping of Mineral Systems
One of the biggest problems in generating realistic geological and alteration models is the lack of consistency in the logging data. Mine site drill hole data bases typically contain logging data collected over a period of many years. In most cases the logging will have been completed by tens of different geologists. Consistent logging requires a significant level of skill and experience, but this task is generally assigned to the most junior geologists. As a result, there is a large degree of subjectivity in the recognition of basic rock types, and an even greater lack of consistency in correctly identifying alteration mineralogy, particularly when it involves logging RC chips ... [ more ]



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