CGRG Bibliography of Canadian Geomorphology
Search Results
Author : Dirszowsky, R.; and Mykytczuk, N.
Date : 2004.
Title : Physical properties and geochemical fingerprinting of recent sediments in two lakes of the Coast Mountains of British Columbia.
Publication : International Conference on Sediment and Geochemical Budgets in Geomorphology to honour Professor Olav Slaymaker. June 27th - 30th, 2004 The University of British Columbia, Vancouver, Canada.
Issue :
Page(s) :
Abstract
This study examines the physical and chemical characteristics of sediments from two lakes in Mt. Garibaldi Provincial Park in order to assess sediment budget components within each watershed. The Cheakamus and Glacier Lake drainage basins are similar in size (~200 km2) but exhibit varying glacier cover and configuration of shared metamorphosed volcaniclastic and igneous intrusive bedrock types. Sediments in each lake consist of massive to laterally continuous laminated silts and clays, interbedded with silt to fine sand laminae associated with inflowing streams. Sediments were analyzed by ICP/MS using “near total” digestion methods to distinguish 18 major and trace elements. Correlation analysis and consideration of inflowing stream bed material indicate that four main groups of elements are useful in distinguishing sources in the two basins: K (Al, Mg, Y), Fe (Cu, Mn, Zn, Co, Ti, V), Ni (Be, Sr), and Ca (Na). Most of these elements exhibit some degree of particle size control showing the dominance of a single input stream at the head of each lake and normal downlake dispersal and fining of sediments. In Cheakamus Lake, K, P and related elements point toward important inputs from slopes to the northeast. In Glacier Lake, Ni in particular distinguishes local inputs along the distal western shore. In both cases, slope sources are underlain by relatively localized volcaniclastic bedrock that is apparently subject to enhanced erosion.
Bibliography of Canadian Geomorphology