Sentences with phrase «occurring pyrite»
However, no such studies have been done with naturally occurring pyrite.
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When burial occured rapidly, fossils were commonly completely replaced with pyrite, in which case preservation was excellent.
«The results were really exciting,» said Qafoku, «because this was the first time that uranium was found to be associated with naturally occurring framboidal pyrites in alluvial sediments.»
X-ray spectroscopic analyses conducted at the Advanced Photon Source at Argonne National Laboratory confirmed that framboidal pyrite uranium occurred in both oxidized and reduced forms.
The % TS were high in all the examined intervals and the sedimentary sulfur occurred mainly as framboidal pyrite, indicating that sufficient sulfate, indicative of seawater, was present in the deep layer of the paleo - Arctic basin and that the pyrite was formed in the sediments under sufficient iron input.