Styriakova（Sの頭にｖ、最後のaの頭に´）,I., Styriak（Sの頭にｖ）,I. and Oberhansli（aの頭に¨）,H.(2012): Rock weathering by indigenous heterotrophic bacteria of Bacillus spp. at different temperature: a laboratory experiment. Miner. Petrol., 105, 135-144.

『異なる温度での固有の従属栄養バクテリアの枯草菌バキッルス種による岩石風化：実験室での実験』

『Abstract
　The bio-weathering of basalt, granite and gneiss was experimentally investigated in this study. These rock-forming minerals weathered more rapidly via the ubiquitous pscychrotrophic heterotrophic bacteria. With indigenous bacteria of Bacillus spp. from sediments of Lake Baikal, we traced the degradation process of silicate minerals to understand the weathering processes occurring at the change temperature in the subsurface environment with organic input. The bacteria mediated dissolution of minerals was monitored with solution and solid chemistry, X-ray analyses as well as microscopic techniques. We determined the impact of the bacteria on the mineral surface and leaching of K, Ca, Mg, Si, Fe, and Al from silicate minerals. In the samples the release of major structural elements of silicates was used as an overall indicator of silicate mineral degradation at 4℃ and 18℃ from five medium exchanges over 255 days of rock bioleaching. The increase of temperature importantly affected the efficiency of Fe extraction from granite and basalt as well as Si extraction from granite and gneiss. In comparison with elemental extraction order at 4℃, Ca was substituted first by Fe or Si. It is evident that temperature influences rock microbial weathering and results in a change of elements extraction.』

Introduction
Materials and methods
　Bacteria and medium
　Rocks and methods
　Experimental methods
Results
　Changes of element extractions
　Changes of rock surfaces
　Changes of rock forming minerals
Discussion
　Biological weathering of rocks dependent on temperature
Conclusions
Acknowledgments
References

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