Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats
Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria...
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ftosti:oai:osti.gov:7198314 2023-07-30T04:02:29+02:00 Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats Chafetz, H.S. 2014-10-10 application/pdf http://www.osti.gov/servlets/purl/7198314 https://www.osti.gov/biblio/7198314 https://doi.org/10.2172/7198314 unknown http://www.osti.gov/servlets/purl/7198314 https://www.osti.gov/biblio/7198314 https://doi.org/10.2172/7198314 doi:10.2172/7198314 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES CARBON CYCLE CYANOBACTERIA WATER CHEMISTRY LIMESTONE ELECTRON MICROSCOPY BAHAMA ISLANDS CALCIUM CARBONATES CLIMATIC CHANGE PROGRESS REPORT TEXAS ALKALINE EARTH METAL COMPOUNDS CALCIUM COMPOUNDS CARBON COMPOUNDS CARBONATE ROCKS CARBONATES CHEMISTRY DEVELOPED COUNTRIES DEVELOPING COUNTRIES DOCUMENT TYPES FEDERAL REGION VI ISLANDS MICROORGANISMS MICROSCOPY NORTH AMERICA OXYGEN COMPOUNDS ROCKS SEDIMENTARY ROCKS USA WEST INDIES 2014 ftosti https://doi.org/10.2172/7198314 2023-07-11T10:54:54Z Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria by which they can be recognized in recent sediments, or in the rock record. Cultures of aerobic and facultative bacteria from cyanobacterial mats on Andros Island, Bahamas, and Baffin Bay, Texas, induced the precipitation of calcium carbonate under controlled conditions. Crusts, the largest features formed, are composed of 5--200{mu}m diameter bundles which are, in turn, composed of numerous individual crystals. The smallest observed features are 0.1--0.4{mu}m spheres and rods which comprise some individual crystals and crystal bundles. Crystal bundles resembling rhombohedra, tetragonal disphenoids, tetragonal dipyramids, and calcite dumbbells appear to be uniquely bacterial in origin, and they have all been observed in recent sediments. Swollen rods, discs, curved dumbbells, and 50--200{mu}m optically continuous crystals resembling brushes may be uniquely bacterial in origin, however, they have not been reported by other laboratories nor observed in natural settings. Presence of any of these forms in recent sediments should be taken as strong evidence for bacterial influence. Spheres and aragonite dumbbells have also been observed in natural environments, however, they are not always bacterial in origin. Precipitation of calcium carbonate occurs preferentially on dead cyanobacteria in the presence of bacteria. Lithification of algal mats to form stromatolites may take place in the zone of decaying organic matter due to bacterial activity. Other/Unknown Material Baffin Bay SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Baffin Bay |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES CARBON CYCLE CYANOBACTERIA WATER CHEMISTRY LIMESTONE ELECTRON MICROSCOPY BAHAMA ISLANDS CALCIUM CARBONATES CLIMATIC CHANGE PROGRESS REPORT TEXAS ALKALINE EARTH METAL COMPOUNDS CALCIUM COMPOUNDS CARBON COMPOUNDS CARBONATE ROCKS CARBONATES CHEMISTRY DEVELOPED COUNTRIES DEVELOPING COUNTRIES DOCUMENT TYPES FEDERAL REGION VI ISLANDS MICROORGANISMS MICROSCOPY NORTH AMERICA OXYGEN COMPOUNDS ROCKS SEDIMENTARY ROCKS USA WEST INDIES |
spellingShingle |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES CARBON CYCLE CYANOBACTERIA WATER CHEMISTRY LIMESTONE ELECTRON MICROSCOPY BAHAMA ISLANDS CALCIUM CARBONATES CLIMATIC CHANGE PROGRESS REPORT TEXAS ALKALINE EARTH METAL COMPOUNDS CALCIUM COMPOUNDS CARBON COMPOUNDS CARBONATE ROCKS CARBONATES CHEMISTRY DEVELOPED COUNTRIES DEVELOPING COUNTRIES DOCUMENT TYPES FEDERAL REGION VI ISLANDS MICROORGANISMS MICROSCOPY NORTH AMERICA OXYGEN COMPOUNDS ROCKS SEDIMENTARY ROCKS USA WEST INDIES Chafetz, H.S. Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES CARBON CYCLE CYANOBACTERIA WATER CHEMISTRY LIMESTONE ELECTRON MICROSCOPY BAHAMA ISLANDS CALCIUM CARBONATES CLIMATIC CHANGE PROGRESS REPORT TEXAS ALKALINE EARTH METAL COMPOUNDS CALCIUM COMPOUNDS CARBON COMPOUNDS CARBONATE ROCKS CARBONATES CHEMISTRY DEVELOPED COUNTRIES DEVELOPING COUNTRIES DOCUMENT TYPES FEDERAL REGION VI ISLANDS MICROORGANISMS MICROSCOPY NORTH AMERICA OXYGEN COMPOUNDS ROCKS SEDIMENTARY ROCKS USA WEST INDIES |
description |
Bacteria induce the precipitation of calcium carbonate in the laboratory and in nature by altering their chemical environment. Geologists are recognizing the possibility that bacterially induced precipitates may form significant mineral deposits, unfortunately, there are currently no sound criteria by which they can be recognized in recent sediments, or in the rock record. Cultures of aerobic and facultative bacteria from cyanobacterial mats on Andros Island, Bahamas, and Baffin Bay, Texas, induced the precipitation of calcium carbonate under controlled conditions. Crusts, the largest features formed, are composed of 5--200{mu}m diameter bundles which are, in turn, composed of numerous individual crystals. The smallest observed features are 0.1--0.4{mu}m spheres and rods which comprise some individual crystals and crystal bundles. Crystal bundles resembling rhombohedra, tetragonal disphenoids, tetragonal dipyramids, and calcite dumbbells appear to be uniquely bacterial in origin, and they have all been observed in recent sediments. Swollen rods, discs, curved dumbbells, and 50--200{mu}m optically continuous crystals resembling brushes may be uniquely bacterial in origin, however, they have not been reported by other laboratories nor observed in natural settings. Presence of any of these forms in recent sediments should be taken as strong evidence for bacterial influence. Spheres and aragonite dumbbells have also been observed in natural environments, however, they are not always bacterial in origin. Precipitation of calcium carbonate occurs preferentially on dead cyanobacteria in the presence of bacteria. Lithification of algal mats to form stromatolites may take place in the zone of decaying organic matter due to bacterial activity. |
author |
Chafetz, H.S. |
author_facet |
Chafetz, H.S. |
author_sort |
Chafetz, H.S. |
title |
Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
title_short |
Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
title_full |
Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
title_fullStr |
Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
title_full_unstemmed |
Bacterially induced precipitation of CaCO sub 3 : An example from studies of cyanobacterial mats |
title_sort |
bacterially induced precipitation of caco sub 3 : an example from studies of cyanobacterial mats |
publishDate |
2014 |
url |
http://www.osti.gov/servlets/purl/7198314 https://www.osti.gov/biblio/7198314 https://doi.org/10.2172/7198314 |
geographic |
Baffin Bay |
geographic_facet |
Baffin Bay |
genre |
Baffin Bay |
genre_facet |
Baffin Bay |
op_relation |
http://www.osti.gov/servlets/purl/7198314 https://www.osti.gov/biblio/7198314 https://doi.org/10.2172/7198314 doi:10.2172/7198314 |
op_doi |
https://doi.org/10.2172/7198314 |
_version_ |
1772813301623816192 |