地质学报2011，Vol.85Issue(9)：1486-1492,7.DOI:11-1951/P.20110907.1101.003
山西耿庄黄铁矿晶须形貌的显微观测及其标型意义
Microscopic Observation of the Pyrite Whisker Patterns in Gengzhuang, Shanxi Province, and Its Typomorphic Significance
摘要
Abstract
Growth of pyrite whiskers is a special type of crystallization. Three-dimensional microscopic observation was conducted on pyrite whishkers occurring on the different parts of barite crystals from Gengzhuang by using laser microscope. The data indicate that whiskers on different parts of barite crystals vary greatly in size, with lengths ranging usually from 150 /xm to 1700 )nm and diameter from 3. 504 μm to 113. 720 μm and the degree of surface undulation changing from 0. 349 μm to 35. 128 μm. Whisker growth presents a law that whisker's length grows gradually from a zone to d zone, while both diameter and degree of surface undulation decreases gradually. Based on occurrence of crystal whiskers and study of fluid inclusions in barite and EPMA data component data, this study comprehensively analyzed the interrelation between crystal whiskers and hydrothermal state or/and evolution process. It is concluded that huge crystal whiskers with relatively low ratio of length and diameter, surface strumae and high impurity content are typomorphic features for comparatively high temperature and high concentration conditions and represent an unstable growth environment; Whikers with varied diameters and complicated appearance are typomorphic features for a wide range of temperatures, relatively high concentration of components and metastable state; and whiskers with small diameters, equality and simple shape represent typomorphic features for a stable temperature, relatively low concentration of components, and stable state. Increasing diameter of crystal whiskers indicates existence of pulsating and repeated process during process of hydrothermal solution evolution. The microscopic characteristic of crystal whiskers is indicative of hydrothermal activity and provides evidence of mineral morphology for studying features and evolution process of hydrothermal fluids.关键词
黄铁矿晶须/微形貌观测/标型意义Key words
nanometer/micrometer pyrite/morphology microscopic observation/typomorphic significance引用本文复制引用
黄菲,寇大明,宋丹,王永钱,成秋明,高文元,谭伟..山西耿庄黄铁矿晶须形貌的显微观测及其标型意义[J].地质学报,2011,85(9):1486-1492,7.基金项目
本文为国家自然科学基金项目(编号40872045、41172047)、地质过程与矿产资潦国家重点实验室(中国地质大学)开放课题(编号GPMR200906)、内生金属矿床成矿机制研究国家重点实验室(南京大学)开放基金项目(编号12-06-03)资助的成果. （编号40872045、41172047）
