《Table 1 Major and minor mineral phases of lake bed sediments by XRD analysis》

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《"Mineralogy and Geochemistry of Major, Trace and Rare Earth Elements in Sediments of the Hypersaline Urmia Salt Lake, Iran"》

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The Islamic peninsula in the northeastern part of USL is a unique geological character of the area.It occupies up to500 km2 of tephritic rocks with agglomeratic texture.Varieties of intermediate to mafic rock types consisting of tephrite，basanite with pyroclastic interlayer agglomerate and weathered tuffaceous materials（Fig.1）are present at this island（Moayyed et al.，2008）.The large volume of volcanic layered rocks may have formed either by frequent flowing lava or rapid collection of pyroclastics after volcanic activity（Fig.2a，b）.Most of these rocks consist of feldspars and large pyroxenes（up to one centimeter in diameter）which have easily exhumed due to weathering and interactions between volcanic rocks with the salty water of the lake（Fig.2c）.Short distance transportation of these minerals has formed a placer deposit parallel to the bank，and also contributed to the bed sediment composition，which is well reflected in XRD analysis（Fig.3，Table 1）.