Cementations of Sand Grains are Accelerated by Microbes
Cementations of Sand Grains are Accelerated by Microbes
复制标题
微生物加速沙粒的胶结
DOI：
10.11362/jcssjnendokagaku1961.40.229
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Tazaki
中科院分区：
文献类型：
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作者：
Hiroshi Shikaura;K. Tazaki
萨摩岩后岛（SIJ）是一个小火山岛，位于纪海破火山口的西北边缘。富含矿物质的酸性温泉导致岛上及其周围海水的各种色调变化。在长滨港可以大规模地看到依赖于高浓度Fe 2+（191ppm）的红海水。在该港口，微生物代谢Fe 2+，形成微生物席和典型的阶地状沉积物（生物阶地）。微生物分泌的胞外物质附着在沙粒上，胶结作用形成生物台地。生物梯田的建设速度非常快，仅用3个月就堆积了1米多。SIJ是研究古叠层石发育过程的一个很好的范例。
Satsuma Iwo-Jima Island (SIJ) is a small volcanic island located on the north-westernmost margin of the Kikai caldera. The acidic mineral-rich hot springs cause various tonal changes of seawater in and around of this island. The red sea water depended on high density of Fe2+(191ppm) can be seen at Nagahama Port on a large scale. At this port, microbes which metabolize Fe2+, make microbial mats and typical terrace-like sediment (bio-terrace). Extra cellular substance secreted by microbes adhere sand grains, and after that this bio-terrace is formed by cementation. The build-up of bio-terrace is very fast and piled up over 1 meter in just 3 months. SIJ is a good example where we can research the developing process of ancient stromatolite.