沉积学报2025，Vol.43Issue(2)：500-512,13.DOI:10.14027/j.issn.1000-0550.2023.034
矿物自动定量分析系统在含铝岩系岩矿分析中的应用
Application of Mineral Automatic Quantitative Analysis System in the Petrology and Mineralogy Analysis of Aluminiferous Rock Series:Taking Taiyuan Formation in the Longdong area as an example
摘要
Abstract
[Objective]Recently,a breakthrough has been made in the gas exploration of the aluminiferous rock se-ries from the Taiyuan Formation in Longdong area of Ordos Basin.However,the mineralogical studies of aluminous rock series are still relatively weak due to the constraints of conventional optical microscopy.This study aims to identi-fy the mineral composition and its occurrence state,determine the elemental types and content of minerals in the ore in detail,discuss their mineral genesis,and summarize the mineral evolution sequence.[Methods]The aluminifer-ous rock series in this area was selected as the object of study.The mineralogical characteristics of the aluminiferous rock series were studied by using TIMA(TESCAN Integrated Mineral Analyzer),a fully automatic mineral analysis system of Czech Republic,combined with thin section observation and other means.[Results]The study shows that the main mineral components of the aluminiferous rock series in the Longdong area include diaspore,siderite,py-rite,illite,kaolinite,and oolitic chlorite.The main body of illite is the product of fluid alteration,the early sedimen-tary kaolinite is the product of weathering,and the late diagenetic kaolinite is formed by silicification of later dia-spore.The simultaneous crystallization of anatase and diaspore was formed in a reducing environment.The early oolit-ic chlorite was formed in a certain karst environment and later migrated to the ore site after a certain distance.The late oolitic chlorite formation is related to the dissolution of siderite.The formation and evolution of minerals in baux-ite rocks in this area can be summarized by:surface weathering,metallogenic,and epigenetic periods.[Conclu-sions]For samples of the aluminum rock series with complex mineral composition and small grains that are not easily observed by optical microscopy,TIMA based on scanning electron microscopy and energy spectrum analysis can quickly and effectively identify the mineral composition of the aluminiferous rock series,obtain mineral composition and elemental information,and identify the symbiotic,attachment,and encapsulated relationship between different minerals.关键词
TIMA/含铝岩系/矿物成分/演化序列/陇东地区Key words
TIMA/aluminiferous rock series/mineral composition/evolutionary series/Longdong area分类
天文与地球科学引用本文复制引用
马琛璐,井向辉,贾连奇,李涵,王爱国..矿物自动定量分析系统在含铝岩系岩矿分析中的应用[J].沉积学报,2025,43(2):500-512,13.基金项目
国家自然科学基金项目(41972143,41502148,42072127) （41972143,41502148,42072127）
长庆油田油气重大专项子课题(技2021-90-5)[National Natural Science Foundation of China,No.41972143,41502148,42072127 （技2021-90-5）
Changqing Oilfield Oil and Gas Major Project,No.2021-90-5] （）
