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@proceedings{1548804, author = {Vašinka, Martin and Krmíček, Lukáš and Všianský, Dalibor and Hrbáček, Filip}, booktitle = {Students in Polar and Alpine Research Conference 2019}, keywords = {lake sediments; trace elements; clay minerals; chemical weathering}, language = {eng}, isbn = {978-80-210-9276-1}, title = {Big Lachman´s lake sediments: role of chemical weathering}, url = {http://www.researchgate.net/publication/332754370_Proceedings_Students_in_Polar_and_Alpine_Research_Conference_2019}, year = {2019} }
TY - CONF ID - 1548804 AU - Vašinka, Martin - Krmíček, Lukáš - Všianský, Dalibor - Hrbáček, Filip PY - 2019 TI - Big Lachman´s lake sediments: role of chemical weathering SN - 9788021092761 KW - lake sediments KW - trace elements KW - clay minerals KW - chemical weathering UR - http://www.researchgate.net/publication/332754370_Proceedings_Students_in_Polar_and_Alpine_Research_Conference_2019 N2 - Big Lachman Lake (Lachman I) is a shallow coastal lake located near the tip of Cape Lachman and mostly developed in the Early to mid-Holocene. The lacustrine sediment is composed dominantly of Neogene basaltic volcanic rocks of James Ross Island Volcanic Group together with Cretaceous sedimentary rocks and admixture of metasediments and granitoids derived from Antarctic Peninsula. The presence of secondary minerals, montmorillonite and kaolinite was determined by XRD diffraction in sediment and their origin in sediment is related to rocks with the same weathering rates as Lachman Lake sediment. Chemical weathering rates was calculated by the Chemical Index of Alteration (CIA) in Lachman lacustrine sediment. Nearby Neogene basalts have CIA weathering rates around optimum fresh values, whereas with Middle Jurassic rhyolites was found good correlation between CIA weathering index and chemical composition of the sediment. These rhyolites come from Antarctic Peninsula and probably were transported into the lake by small glaciers. ER -
VAŠINKA, Martin, Lukáš KRMÍČEK, Dalibor VŠIANSKÝ a Filip HRBÁČEK. Big Lachman´s lake sediments: role of chemical weathering. In \textit{Students in Polar and Alpine Research Conference 2019}. 2019. ISBN~978-80-210-9276-1.
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