论沉积盆地内成岩相系划分及类型  

Classification and types of diagenetic lithofacies systems in the sedimentary basin

作　　者：方维萱[1,2] FANG Weixuan(Innovation Laboratory of Mine,Environment and Mineral,China Nonferrous Metals Resource Geological Survey,Beijing 100012,China;Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China)

机构地区：[1]有色金属矿产地质调查中心矿山生态环境资源创新实验室,北京100012 [2]昆明理工大学国土资源工程学院,云南昆明650093

出　　处：《地质通报》2020年第11期1692-1714,共23页Geological Bulletin of China

基　　金：国土资源公益性行业科研专项项目《塔西砂砾岩型铜铅锌矿床成矿规律与找矿预测》(编号:201511016)、《塔西地区砂砾岩型铜铅锌矿床成矿系统、找矿预测技术集成与靶区圈定》(编号:201511016-1);国家自然科学基金项目《有机质与金属矿共存的微纳米尺度特征及成藏成矿机理》(批准号:41872160);云南省矿产资源评价工程实验室(2010);云南省地质过程与矿产资源创新团队项目(2012)。

摘　　要：沉积盆地内成岩作用和成岩相系划分研究,不仅有助于提升对沉积盆地内金属矿产、非金属矿产、能源矿产(石油、天然气、煤和铀矿)等同盆共存富集与协同成岩成矿成藏作用等方面的研究水平,也有助于提升对沉积盆地形成演化历史、盆山和盆山原耦合转换等大陆动力学过程的深入研究。将沉积盆地内成岩作用和成岩相系划分与地球化学岩相学识别技术紧密结合,采用构造岩相学与地球化学岩相学研究思路和方法,以成岩事件序列为主线,将沉积盆地内成岩相系划分为:①成盆期埋深压实物理-化学成岩作用和成岩相系;②盆地改造期构造-热事件成岩作用与构造热事件改造成岩相系;③盆内岩浆叠加期构造-岩浆-热事件成岩作用和岩浆叠加成岩相系;④盆地表生变化期表生成岩作用和表生成岩相系。从地球化学岩相学成岩机理上,对成岩相系的成岩环境和成岩机理进行识别,促进非金属矿产、金属矿产-油气资源-煤-铀等同盆共存与协同富集成矿成藏机理研究和深部矿产资源预测。Classification of diagenesis lithofacies systems in sedimentary basin may help promote the research level of enrichment and synergistic diagenesis-mineralization for metallic and nonmetallic deposits and such energy mineral resources as oil,gas,coal and uranium deposits in the same basin;moreover,it may encourage researchers to get a better understanding of geodynamic process in basin evolution and formation,coupling transitions of basin-mountain,and coupling transitions of basin-mountain-plateau.In this study,systems of diagenetic lithofacies in the basin were categorized based on the principal line of diagenesis events in the basin,using means of tectonic lithofacies and geochemical lithofacies,and combining diagenesis and systems of diagenetic lithofacies with recognition technology of geochemical lithofacies.Systems of diagenetic lithofacies in the basin were classified into four systems,i.e.,diagenesis system formed by buried compaction to chemical diagenesis at the stage of basin formation,renovated diagenesis system formed by tectonic-thermal events at the stage of basin renovation,magmatic superimposed diagenesis system formed by thermal events of tectonics-magmatism at the stage of magmatic intrusions in the basin,and supergene diagenesis system at the stage of supergene modification in the basin.Therefore,environments of diagenetic lithofacies and diagenetic mechanisms may be recognized from the mechanism of geochemical lithofacies.This may help promote the research level of enrichment and synergistic diagenesis-mineralization for metallic and nonmetallic deposits,such energy mineral resources as oil,gas,coal and uranium deposits and predication of deep mineral systems in the same basin.

关 键 词：沉积盆地 成岩相系类型 成岩作用 分类 

分 类 号：P586[天文地球—岩石学]