Microbial Processes Forming Daily Lamination in an Aragonite Travertine, Nagano-yu Hot Spring, Southwest Japan
نویسندگان
چکیده
منابع مشابه
Phase Transformation of Mg-Calcite to Aragonite in Active-forming Hot Spring Travertines
A travertine specimen collected from the western part of Yunnan Province of China was subjected to microstructural analysis by powder X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy and energy dispersive X-ray spectroscopy. A new formation mechanism was proposed whereby polycrystalline rhombohedral particles of magnesium-containing calcite under...
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The process of ductile fracture which occurs due to the accumulation, growth and combination of defects or cracks of material is called ductile damage. Failure in materials can be predicted, using damage mechanics and damage criteria. On the other hand, most of the materials depended to the manufacturing process, are formed in warm or hot conditions so that; the temperature also affects on the ...
متن کاملDepositional facies and aqueous-solid geochemistry of travertine-depositing hot springs (Angel Terrace, Mammoth Hot Springs, Yellowstone National Park, U.S.A.).
Petrographic and geochemical analyses of travertine-depositing hot springs at Angel Terrace, Mammoth Hot Springs, Yellowstone National Park, have been used to define five depositional facies along the spring drainage system. Spring waters are expelled in the vent facies at 71 to 73 degrees C and precipitate mounded travertine composed of aragonite needle botryoids. The apron and channel facies ...
متن کاملRaman and SEM analysis of a biocolonised hot spring travertine terrace in Svalbard, Norway
BACKGROUND A profile across 8 layers from a fossil travertine terrace from a low temperature geothermal spring located in Svalbard, Norway has been studied using both Raman spectroscopy and SEM (Scanning Electron Microscopy) techniques to identify minerals and organic life signals. RESULTS Calcite, anatase, quartz, haematite, magnetite and graphite as well as scytonemin, three different carot...
متن کاملMicrobial diversity in hot spring cyanobacterial mats: pattern and prediction
Direct molecular analysis of the composition and structure of geothermal cyanobacterial mat communities has revealed diversity patterns suggesting that adaptive radiation and geographic isolation are the important drivers of cyanobacterial diversification. It is clear that 16S rRNA sequence variation cannot detect all ecological or geographic populations (ecotypes and geotypes, respectively), b...
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ژورنال
عنوان ژورنال: Geomicrobiology Journal
سال: 2011
ISSN: 0149-0451,1521-0529
DOI: 10.1080/01490451003743275