Distinguishing glaciogenic deposits in southern Finnish Lapland: implications for exploration

Autor:	P. Sarala, V. J. Ojala, V. Peuraniemi, S. Rossi
Rok vydání:	2007
Předmět:	geography geography.geographical_feature_category Heavy mineral Bedrock Drumlin Geochemistry Geotechnical Engineering and Engineering Geology Debris Stratigraphy Geochemistry and Petrology Moraine Earth and Planetary Sciences (miscellaneous) Glacial period Quaternary Geomorphology Geology
Zdroj:	Applied Earth Science. 116:22-36
ISSN:	1743-2758 0371-7453
DOI:	10.1179/174327507x167019
Popis:	In glaciated terrains, the knowledge of Quaternary geology is essential for successful exploration. In Finland, the bedrock is almost completely covered by till of variable composition, thickness and stratigraphy, as well as various types of moraine formations from recent glaciations. In this study, the morphological, stratigraphical and compositional investigations of till and moraines in southern Finnish Lapland were combined with heavy mineral and geochemical studies to trace mineralised sources in the bedrock. In the study area, the glacial morphology is composed of an assemblage of transversal ribbed moraines and longitudinal drumlins and flutings with gently undulating till cover in between. In places, weathered bedrock remnants are preserved beneath the till cover and can be useful sampling media for exploration. The ribbed moraine ridges are the most favourable moraine type for exploration. Short glacial transportation of debris and boulders in the upper till and surface of the ridges is a...
Databáze:	OpenAIRE
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