Presentation Information
[R1P-05]Mineralogical study on zeolites in gastropod fossils in Miocene sediments in Minamisoma , Fukushima , Japan[Presentation award entry]
*Atsushi ISHIHARA1, Hiroaki Ohfuji1 (1. Sci. Tohoku Univ.)
Keywords:
zeolite,heulandite,mineralized fossil
To understand origin and formation processof zeolites in gastropod fossils in Miocene sediments in Minamisoma , Fukushima , Japan , we investigated the mineralogical characteristics of them. Our observation suggests two important factors in the zeolite formation inside the fossils: 1) the shells provided a (semi-)closed environment in which fluid was retained over a long time period, and 2) diagenesis provided suitable temperature conditions for the formation of zeolite.
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