MICROFOSSILS FROM LATE PROTEROZOIC MANGANESE ORE DEPOSITS IN WESTERN HUNAN PROVINCE AND EASTERN GUIZHOU PROVINCE, SOUTH CHINA

被引：0
|
作者：
尹磊明
机构：
[1] Nanjing 210008
[2] PRC
[3] Academia Sinica
[4] Nanjing Institute of Geology and Palaeontology
来源：
Science China Chemistry | 1990年 / Ser.B.1990卷 / 06期
基金：
中国国家自然科学基金;
关键词：
eastern Guizhou and western Hunan; late Proterozoic manganese ore deposits; microorganisms;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Abundant microfossils and organic residuals have been discovered by SEM and normal palynological maceration from manganese ore beds intercalated in late Proterozoic glacial rock units in western Hunan Province and eastern Guizhou Province. Taking isotopic dating into consideration, the age of manganese ore deposits in both regions is suggested to be about 750 Ma. A distinct character is that a great quantity of colonial microfossil——Sphaerocongregus (or Bavlinella) and their degradational variants have been obtained from rhodochrosite. Their biological and biochemical functions, combined with the geochemical effect of manganese in different ways, may play an important role in the manganese cycle.
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页码：726 / 734
页数：9
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