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关于“超微细菌”的争论:灰岩成因研究的重要驱动力
引用本文:梅冥相. 关于“超微细菌”的争论:灰岩成因研究的重要驱动力[J]. 古地理学报, 2011, 13(4): 363-374. DOI: 10.7605/gdlxb.2011.04.001
作者姓名:梅冥相
作者单位:中国地质大学(北京)地球科学与资源学院,北京 100083
基金项目:国家自然科学基金会资助项目(编号:40472065); 中国石油化工股份有限公司海相前瞻性项目(编号:C0800-07-ZS-164)共同资助
摘    要:在高倍(>50000x)扫描电子显微镜(SEM)、原子显微镜(AFM)或透射电子显微镜(TEM)下,那些在岩石和矿物中所见到的纳米级别的物体常常吸引了地质学家们的注意.这些物体大小在25~300 nm之间,多呈球状、棒状或卵圆状;对这些物体的成因,存在不同的看法而导致了剧烈的争论.因为这些物体与真菌中的球菌和杆菌总体相...

关 键 词:超微细菌  超微化石  争论  细菌成核作用  碳酸盐沉积学
收稿时间:2011-02-21

Disputation of nannobacteria:An impetus promoting studies of origin of limestones
Mei Mingxiang. Disputation of nannobacteria:An impetus promoting studies of origin of limestones[J]. Journal of Palaeogeography, 2011, 13(4): 363-374. DOI: 10.7605/gdlxb.2011.04.001
Authors:Mei Mingxiang
Affiliation:School of Earth Sciences and Natural Resources,China University of Geosciences(Beijing),Beijing 100083
Abstract:Those nanometer-scale spherical-,rod-,or ovoid-shaped objects in the 25~300 nm range,which are visible in rocks and minerals by high-magnification(>50000×) scanning electron microscope(SEM),atomic force microscope(AFM),or transmission electron microscope(TEM)analyses,attract the geologists attention.For the origin of these nanometer-scale objects,different views result in a strong disputation.Because of the general resemblance between these objects and eubacterial cocci or bacilli,and because of their tendency to occur in chains or clusters,it was initially proposed that the objects were “dwarf forms” of bacteria,“nannobacteria”,or their fossilized equivalents,“nannofossils”.The focus of geologic objections to the actuality of nannobacteria is that features of this scale may have many possible origins,e.g.,micromineral inclusions or crystallographic edge effects;further,a sphere <140 nm diameter is biologically thought to be too small to contain all the components necessary for an independent life.Therefore,this disputation that occurred at the turn of centuries and had continued thus far became an important impetus promoting the studies of the origin of limestones although an affirmative conclusion remains uncertain.
Keywords:nannobacteria  nannofossils  disputation  bacteria nucleation  carbonate sedimentology  
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