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标题：Investigations of detrital zircon, rutile and titanite from present-day Labrador drainage basins: fingerprinting the Grenvillean front
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作者：Tonny B. Thomsen ; Christian Knudsen ; Alana M. Hinchey 等
期刊名称：Geological Survey of Denmark and Greenland Bulletin
印刷版ISSN：1604-8156
出版年度：2015
卷号：33
页码：77-80
语种：English
出版社：De Nationale Geologiske Undersoegelser for Danmark og Groenland
摘要：A multidisciplinary provenance study was conducted onstream sediment samples from major rivers in the easternpart of Labrador, Canada (Fig. 1). Te purpose was to f ngerprint the sources that deliver material to the stream sediments and to the reservoir sand units deposited oﬀshore inthe sedimentary basins in the Labrador Sea. We used a multimineral U-Pb geochronological approach employing rutileand titanite in addition to zircon to obtain unbiased agedata. Te purpose of this was to characterise the diﬀerent igneous and metamorphic episodes that occurred in Labrador,which is an area with highly variable geology characterisedby the Palaeoproterozoic south-eastern Churchill provincein the north-west, the Archaean Nain plutonic suite in thenorth-east, the Palaeoproterozoic Makkovik province inthe east and the Mesoproterozoic Grenville Province to thesouth. Te feld work was carried out in 2012 and 2013 andthe study is a collaborative project between the GeologicalSurvey of Denmark and Greenland and the Geological Survey of Newfoundland and Labrador. In this paper we focuson three samples from the southern part of the study areawhere two parts of the Grenville orogeny are found (Fig. 1).