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Developing a schematic petrogenetic transect for a contact aureole using field spectrometry; a case study in Los Santos, Salamanca Province, central-western Spain

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Much work has been done in construction of petrogenetic grids for regional-scale metamorphic terrains, but low-pressure assemblages, such as contact aureoles, have been relatively ignored. This study has focused on developing a petrogenetic transect for a granitic aureole using a portable field spectrometer. Distribution of mineral assemblages, their modes, metamorphic zones, paragenetic sequences and isograds were mapped along a 4 km long transect. The transect starts at the fresh granite and cuts through the metamorphic contact aureole into the host rocks. Metamorphic reactions responsible for mineral changes were also defined. The method demonstrated potential in mineral mapping and the results could be used to support other methods like hyperspectral image analysis.

Document Type: Research Article


Publication date: 2002-12-10

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