Generalized conditions of spherical carbonate concretion formation around decaying organic matter in early diagenesis.

ABSTRACT: Isolated spherical carbonate concretions observed in marine sediments are fascinating natural objet trouve because of their rounded shapes and distinct sharp boundaries. They occur in varied matrices and often contain well preserved fossils. The formation process of such concretions has been explained by diffusion and rapid syn-depositional reactions with organic solutes and other pore water constituents. However, the rates, conditions and formation process of syngenetic spherical concretions are still not fully clear. Based on the examination of different kinds of spherical concretions from several locations in Japan, a diffusion based growth diagram was applied to define the generalized growth conditions of spherical concretions formed around decaying organic matter. All analytical data

SUBMITTER: Yoshida H 

PROVIDER: S-EPMC5910387 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature