11 July 1997 Significance of microstructure for the recognition of biologically mediated mineralization
Author Affiliations +
Abstract
The microstructure and surface microtopography of biogenic carbonate minerals were compared and contrasted with synthetic and natural abiotic carbonates. Bacteria and their by-products on mineral surfaces are imaged in TEM using high-resolution platinum/carbon and gold-decorated replicas. In contrast to SEM, this technique allows imaging of organic and inorganic structures in their original hydrated states and at higher magnification. The material examined so far show different microstructures between bacterial-mediated and inorganic minerals. This suggests that in the absence of preserved microorganisms, the unique microstructure and surface microtopography (biominerals) can be used to recognize biological activities in ancient terrestrial and extraterrestrial rocks.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hojatollah Vali, Hojatollah Vali, Jeanne Paquette, Jeanne Paquette, S. Kelly Sears, S. Kelly Sears, Mounir Temmam, Mounir Temmam, Anthony E. Williams-Jones, Anthony E. Williams-Jones, Everett J. Gibson, Everett J. Gibson, Kathy L. Thomas-Keprta, Kathy L. Thomas-Keprta, Christopher S. Romanek, Christopher S. Romanek, David S. McKay, David S. McKay, "Significance of microstructure for the recognition of biologically mediated mineralization", Proc. SPIE 3111, Instruments, Methods, and Missions for the Investigation of Extraterrestrial Microorganisms, (11 July 1997); doi: 10.1117/12.278767; https://doi.org/10.1117/12.278767
PROCEEDINGS
7 PAGES


SHARE
RELATED CONTENT

Nanobacteria are alive on Earth as well as Mars
Proceedings of SPIE (July 10 1997)
Phosphate biomineralization of cambrian microorganisms
Proceedings of SPIE (July 05 1998)
Bacterial paleontology for astrobiology
Proceedings of SPIE (February 04 2002)
Bacterial concrete
Proceedings of SPIE (April 05 2001)
Atlas of bacteriomorphs in carbonaceous chondrites
Proceedings of SPIE (February 09 2004)

Back to Top