Pelagic Manganese Nodules--A New Type of Oncolites  

作　　者：Bian Lizeng Lin Chengyi Zhang Fusheng Du De’an Chen Jianlin and Shen Huadi Department of Earth Sciences Centre for Materiale Analysis,Nanjing University,Jiangsu Second Institute of Oceanography, State Oceanic Administration,Hangzhou, Zhejiang Liu Xinzhu 

出　　处：《Acta Geologica Sinica(English Edition)》1997年第1期43-48,115-116,共8页地质学报（英文版）

基　　金：This Research was supported by the foundations from the National Committee of Education,the Cenire for Materials Analysis and the Laboratory of Mineral Deposits,Nanjing University.

摘　　要：Pelagic manganese nodules from the East Pacific Ocean have been studied using polarizing,scanning electron and transmission electron microscopes. It has been revealed that the manganesenodules are composed of cores and stromatolite coatings. The structures and textures of thesenodules are peculiar to oncolite. Consequently, the pelagic manganese nodules are manganeseoncolites. Based on the stromatolites in the coatings, the manganese oncolites from the East Paci-fic Ocean can be divided into two types. One is smooth on surface and dense inside. Its coatingsare composed mainly of Minima. The other has a knobby surface and is loose internally. Itscoatings consist mainly of Admirabilis. The TEM investigation has also revealed that the con-structors of the manganese oncolites are ultra-microbes. The Minima is constructed byMiniactinomyces chinensis sp. nov. and the Admirabilis is built by Spirisosphaerospora pacifica sp.nov.Pelagic manganese nodules from the East Pacific Ocean have been studied using polarizing,scanning electron and transmission electron microscopes. It has been revealed that the manganesenodules are composed of cores and stromatolite coatings. The structures and textures of thesenodules are peculiar to oncolite. Consequently, the pelagic manganese nodules are manganeseoncolites. Based on the stromatolites in the coatings, the manganese oncolites from the East Paci-fic Ocean can be divided into two types. One is smooth on surface and dense inside. Its coatingsare composed mainly of Minima. The other has a knobby surface and is loose internally. Itscoatings consist mainly of Admirabilis. The TEM investigation has also revealed that the con-structors of the manganese oncolites are ultra-microbes. The Minima is constructed byMiniactinomyces chinensis sp. nov. and the Admirabilis is built by Spirisosphaerospora pacifica sp.nov.

关 键 词：pelagic manganese nodule ONCOLITE STROMATOLITE ultra-microfossil 

分 类 号：P744[天文地球—海洋科学]