A Review of Research Progress in the Genesis of Colloform Pyrite and Its Environmental Indications

作     者：GAO Shang HUANG Fei WANG Yinghui GAO Wenyuan 

作者机构：Key Laboratory of Ministry of Education on Safe Mining of Deep Metal MinesCollege of Resource and Civil Engineering Northeastern University 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2016年第90卷第4期

页      面：1353-1369页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 

基　　金：funded by the National Natural Science Foundation of China(41272062) the Fundamental Research Funds for the Northeastern University(N150106001) the Open Foundation Of State Key Laboratory Of Ore Deposit Geochemistry(Institute Of Geochemistry,Chinese Academy Of Sciences,Guiyang)(201308) the Open Foundation Of Key Laboratory Of Mineralogy and Metallogeny in Guangzhou Institute of Geochemistry,Chinese Academy of Sciences(KLMM20150101) 

主　　题：colloform pyrite nano-micro crystals aggregation growth mechanism environmental indication nanoscience and nanotechnology 

摘      要：Colloform pyrite is a special form of nano-micro polycrystalline aggregation growth, for which a suitable term is ＂aggregates of nano-micro crystals＂. This kind of colloform texture is observed in various geological bodies, such as ancient sedimentary rocks, modern marine and lake sediments, various types of ore deposits, and modern seafloor hydrothermal vents. This paper summarizes the latest developments and research into the definition, formation mechanisms, and environmental indications of colloform pyrite. There appears to be three main formation mechanisms of colloform pyrite： pseudomorphic replacement; biogenic precipitation; and inorganic precipitation. The morphology, particle size, trace element content and preferential growth orientations of coUoform pyrite microcrystals can be important indicators for sedimentary environments, hydrothermal activity, and ore-forming processes. We suggest that the microscopic features of nano-micro crystals in colloform pyrite and their aggregation growth patterns need further investigation. The relationships between formation mechanisms of colioform pyrite, organic activity and depositional environments require further exploration. To reveal the nature of nano-micro grain aggregation growth in colloform pyrite and analyse its growth environment and evolutionary history, it is supposed to apply nanoscientific and nanotechnological methods, further integrate consideration of macroscopic geological backgrounds and microscopic mineral growth phenomena, combine high-resolution imaging systems and in situ quantitative microanalysis methods and constitute a mergence of earth science, thermodynamics and kinetics, life science, material science, and chemistry in the study.