摘要
粘土矿物高岭石的有序化程度与其成因关系密切 ,而又受诸因素的作用和影响。通过对我国沉积岩中高岭石的大量研究和资料收集 ,获得新的发现和认识。无序高岭石一般在常温常压下通过结晶八面体中离子交换而形成 ,并可在较稳定的地质条件下长期保存 ,或因相邻晶层错动而无序等。但总的说 ,在地热与高温热水作用或水岩作用中它常由无序向有序化固相发展。过去国内一般认为高度有序高岭石系受浅成脉岩或喷出岩热液蚀变而成。这种情况在国内外都是存在的。然而研究后发现大范围更高度有序化高岭石则是煤系紫矸 (高岭石软质粘土 )
The order of kaolinite repersents its origin. A new discovery and understanding about the relationship of kaolinite order and its origin are obtained from the detail study of kaolinite in coal measures. Disorder kaolinite is generally formed under the conditions of normal temperature and pressure and will be preserved as disorder because of substitution of Fe or Ti ion for Al ion in octahedron and dislocation of neighouring crystal layers for long period under the stable geological conditions However, the disorder kaolinite is generally turned to the ordered under geotherm, high temperature water and water-rock reactions. In the past, the experts in our country thought that very well order kaolinite is related to the shallow hydrothermal alteration of shallow dyke and extrusive rocks. But our studies in this paper show that very well order kaolinite in the purple partings (soft kaolin clay) of coal is formed by superimposition of ascended hydrothermal fluid related to regional magmatism on geotherm in intergrain space.
出处
《地质找矿论丛》
CAS
CSCD
2002年第2期73-81,共9页
Contributions to Geology and Mineral Resources Research
基金
国家自然科学基金项目 (批准号 :4980 2 0 10 )
教育部高等学校优秀青年教师教学科研奖励基金联合资助
关键词
高岭石
高度有序化
后生上升热水
成因
Kaolinite
very well order
epigenesis
ascended hydrothermal solution
origin
