Biogenic apatite in carbonate concretions with and without fossils investigated in situ by micro-Raman spectroscopy.

ABSTRACT: Micro-Raman spectra of concretions with and without fossils were measured in a nondestructive manner. The band position and full width at half maximum height (FWHM) of ν₁-PO₄^3- of apatite in the concretions were analyzed to investigate the origin of apatite. The analyzed concretions were derived from the Kita-ama Formation of the Izumi Group, Japan. The micro-Raman analysis showed that the apatites in the concretions were divided into two groups: Group W (wide FWHM group) and Group N (narrow FWHM group). The apatite belonging to Group W is suggested to be biogenic apatite originating from the soft body tissues of organisms because the Sr content is high and the FWHM is similar to that of apatite in bones and teeth of present-day animals. The other apatite b

SUBMITTER: Kitanaka R 

PROVIDER: S-EPMC10272169 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature