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dc.contributor.authorMagnus Ivarssonen_US
dc.contributor.authorHenrik Skogbyen_US
dc.contributor.authorBongkot Phichaikamjornwuten_US
dc.contributor.authorStefan Bengtsonen_US
dc.contributor.authorSandra Siljeströmen_US
dc.contributor.authorPrayote Ounchanumen_US
dc.contributor.authorApichet Boonsoongen_US
dc.contributor.authorMingkhwan Kruachantaen_US
dc.contributor.authorFederica Maroneen_US
dc.contributor.authorVeneta Belivanovaen_US
dc.contributor.authorSara Holmströmen_US
dc.description.abstract© 2018 Ivarsson et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Garnets from disparate geographical environments and origins such as oxidized soils and river sediments in Thailand host intricate systems of microsized tunnels that significantly decrease the quality and value of the garnets as gems. The origin of such tunneling has previously been attributed to abiotic processes. Here we present physical and chemical remains of endolithic microorganisms within the tunnels and discuss a probable biological origin of the tunnels. Extensive investigations with synchrotron-radiation X-ray tomographic microscopy (SRXTM) reveal morphological indications of biogenicity that further support a euendolithic interpretation. We suggest that the production of the tunnels was initiated by a combination of abiotic and biological processes, and that at later stages biological processes came to dominate. In environments such as river sediments and oxidized soils garnets are among the few remaining sources of bio-available Fe2+, thus it is likely that microbially mediated boring of the garnets has trophic reasons. Whatever the reason for garnet boring, the tunnel system represents a new endolithic habitat in a hard silicate mineral otherwise known to be resistant to abrasion and chemical attack.en_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectBiochemistry, Genetics and Molecular Biologyen_US
dc.titleIntricate tunnels in garnets from soils and river sediments in Thailand – Possible endolithic microboringsen_US
article.title.sourcetitlePLoS ONEen_US
article.volume13en_US Universiteten_US riksmuseeten_US Universityen_US Technical Research Institutes of Swedenen_US Mai Universityen_US Scherrer Instituten_US universiteten_US
Appears in Collections:CMUL: Journal Articles

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