摘要:
根据我国南方震旦—寒武纪磷块岩的结构成因类型和形成阶段,将磷块岩划分为微粒磷块岩、颗粒磷块岩和壳粒磷块岩三大基本类型。其中壳粒磷块岩的最主要的结构组分是由微生物建造的磷酸盐壳粒组成的。笔者对壳粒磷块岩进行了深入地研究,在壳粒中发现六种形态的磷质微生物(化石):(1)管状微生物;(2)杆状微生物;(3)纤维状微生物;(4)球状微生物;(5)灌丛状微生物;(6)三射状微生物。
Abstract:
According to their fabric features, Sinian-Cambrian Phosphorites in South China can be classified into three major basic types: micrograined, grained and crust-grained phosphorites, among which the textural component of the crust-grained phosphorite is predominately made up of phosphate crust-grains formed by microorganism. There are six forms of phosphate microorganism found in the phosphate crust-grains; ( 1 ) tube-shaped, ( 2 ) rod-shaped, ( 3 ) fibrous, ( 4 ) microglobal, ( 5 ) clumping, ( 6 ) tricuspid. All of them not only have distinct form features of microorganism,but also remain important organic components-amino acid and nucleic-acid-of organic tissues in their fossils. It is known that phosphorus, as a basic nutrient, is so necessary for the growth of all microorganism that none of them would not depend on it. Phosphorus is a structural element of enzymes, adenosine triphosphate, ribonucleic acid, desoxyri-bonucleic acid,nucleic acid and phospholipids,from which cell membranes are made. Microorganism plays a very important role in the circle of phosphorus on the earth. It is the microorganism action that is an important link in the circle of 'phosphorus in the ocean for the concentration of phosphorus to form ore deposits. Recent year studies on liquid crystal materials hane convinced the author that consideralle physiological behaviors of phosphorus-thirsty microorganism, i. e. the preferential extraction, accumulation and transportation of phosphates, may be attributed to the liquid crystal form of the tissues and cells of phosphorus-thirsty microorganism
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