Showing papers by "Geological Survey of Sweden published in 1999"
TL;DR: In this article, the spatial distribution of heavy metals in the surficial sediments of the Kattegat and Skagerrak is described based on multivariate statistical analyses and principal component analysis is used to gain information on the chemical characteristics of the metals as a group.
136 citations
TL;DR: In this paper, it was shown that the Eastern Segment of the Sveconorwegian orogen contains tectonically reworked TIB rocks and that there is no major lithological discontinuity either across the Scecorwegian Frontal Deformation Zone or within the eastern Segment.
94 citations
TL;DR: In this article, the results of the chemical, clay mineralogy and microscopic examinations of the bedrock and mineral fragments indicate that the material in the different facies of the varved clay is mainly produced by moderate alteration and erosion from the local bedrock of predominantly granitoid rocks and of residual kaoline deposits.
Abstract: The purpose of this investigation is to describe and interpret the sedimentology and petrography of Late Weichselian varves in southeastern Sweden in order to determine their nature and origin. It is focused on the microscopic evidence for glaciolacustrine varve sedimentation in the Baltic Ice Lake and the possibilities of making a detailed facies classification of the sediments in an area with an established varve chronology. The material examined was cores taken from five representative localities in an area below the highest shoreline of the Baltic Ice Lake in the provinces of Skane and Blekinge, i.e., below an altitude of 55–65 m. The investigations included chemical analyses, XRD, microscopy (polarized) and SEM-EDX investigations of the summer and winter layers of the varves. The results of the chemical, clay mineralogy (XRD) and microscopic examinations of the bedrock and mineral fragments indicate that the material in the different facies of the varved clay is mainly produced by moderate alteration and erosion from the local bedrock of predominantly granitoid rocks and of residual kaoline deposits. It is possible to distinguish microscopic evidence of four varve types differing in texture depending on the water depth and how close to the ice the different facies were deposited, i.e., if they were deposited proximally, distally or extramarginally in relation to the ice margin. It is also possible to relate these differences to changes in the palaeoclimate during the deglaciation of the area in the Bolling and Older Dryas chronozones.
34 citations
TL;DR: In this paper, the authors used Geographical Information System (GIS) and multivariate analyses to determine whether the high concentrations of Pb are derived from natural sources or from anthropogenic pollution.
27 citations
9 citations
6 citations
TL;DR: In this paper, two samples have been radiocarbon-aged to 1455±70 14 C years, and the lowermost part of a peat sequence in a soligenous mire in the valley of the stream Tangan.
Abstract: During the investigation of the erosional effects of the rainstorm on 30-31 August 1997 on Mount Fulufjallet, two samples have been radiocarbon age determined. The results give a maximum age of events occurring earlier. One sample of an exposed Picea trunk in the sandur of the stream St Goljan was radiocarbon dated to 1320±120 14 C years BP. The lowermost part of a peat sequence in a soligenous mire in the valley of the stream Tangan was radiocarbon dated to 1455±70 14 C years.
2 citations