Trace Elements in Gravberg Drillhole Samples

摘要

Trace elements in Gravberg drillhole samples in granitic rock at the Siljan impact structure in Sweden were studied. The impact structure is the first non-sedimentary basin related formation to be used to test the thesis of abiogenic hydrocarbon resources. Trace element data were correlated with hydrocarbon profiles and other indicators of sources and transport of hydrocarbon related volatiles such as H sub 2 and He and with rock porosities. Volatile trace elements, especially Hg, are being studied. An understanding of the distribution and migration of Hg can provide insights into the behavior of volatiles such as CH sub 4 . Hg is measured in stepwise heating experiments. Labile (less than or equal to130 sup 0 C) and retentive (up to 1200 sup 0 C) sites are identified. The former are related to gases, the latter to less volatile elements and/or compounds. Data on other volatiles such as Se, Sb, Zn, and relatively non-volatile Fe, Co, Sc, and REE are also utilized. (ERA citation 13:009980)