Electron Microscoplc and mineralogical studies on biologically induced metal ores and minerals

生物诱发金属矿石和矿物的电子显微镜和矿物学研究

基本信息

批准号：
08454155
负责人：
AKAI Junji
金额：
$ 5.06万
依托单位：
Faculty of Science, Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

It is interesting to investigate biologically Induced metal ore or rnineral phases. The processes have much impact to Earth'ssurf ace environments and also on Earth History. In this project, three major sub-themas were selected : that is, (1) Formation processes of biolocgically induced iron ore, such as Gunma lion Mine, (2) Old and recent stromatoilte structures and their characteristics, and (3) biogenic (magne to tactic bacterial) magnetite. One of the major results of these studies is about (1) on Gunma Iron mine. The following is the summary. Sedimentary iron ores From the Iron Mine were mine ralogically described .The Iron ore is composed of nanocrystalline goethite, well crystallized jarosite and very small amounts of strengite. Characteristiciron-ore types include thick-banded iron, thin-banded lion ore and fossil-aggregate ore rich in moss and/or leaves. Algal fossils are clearly preserved in the goethite bands in the thick-banded ore. Lattice imaging howed characteristic crystallographic orientations of the goethite nanocrystals. The thin- banded lion ores may probably formed by bacterial iron biominera1ization. The bandings may be attributed to biological or seasonal rhythms. Various products of biomineraIization are found in the present pH 2-3, Fe2^<2+>-and SO_4^<2-> rich streams ; Fe-P-(S) to Fe-S-(P) precipitates. Mosses and green algae are also collecting Fe precipitates in and around the cells. These ores are regarded as Biologicaly Induced lron Ore. (2) Mn stromatolite were found both from Japan (as recent hot springsediments), and from Australia precambrian strata. (3) The magnetite was mine ralogically and cryst allographically examined.

研究生物学诱导的金属矿石或rnineral相很有趣。这些过程对地球的王牌环境以及地球历史产生了很大影响。在该项目中，选择了三个主要的亚themas：也就是说，（1）生物测度诱导的铁矿石的形成过程，例如Gunma Lion矿山，（2）旧的和近期的质谱结构及其特征，以及（3）生物（3）生物源（磁性细菌）磁铁矿。这些研究的主要结果之一是（1）关于Gunma Iron Ine。以下是摘要。铁矿中的沉积铁矿石是我的修复中描述的。铁矿石由纳米晶型果蝇，结晶良好和少量的strengite组成。特征性铁矿类型包括厚带铁，薄带狮子矿石和富含苔藓和/或叶的化石聚集的矿石。藻类化石清楚地保存在厚带矿石中的谷虫带中。晶格成像如何在谷石纳米晶体的特征晶体学方向。薄带狮子可能是由细菌铁生物米尼层化形成的。乐队可能归因于生物学或季节性节奏。在当前的pH 2-3，fe2^<2+> - 以及so_4^<2->丰富的流中发现了各种生物工厂化的产物； Fe-P-（S）至Fe-S-（P）沉淀。苔藓和绿色藻类也在细胞内和周围收集Fe沉淀。这些矿石被认为是生物诱导的lron矿石。（2）Mn叠液岩均来自日本（最近的Hot Springsediments）和澳大利亚前寒武纪地层。（3）磁铁矿是我的变频器和晶体上检查的。