新余铁矿田铁矿成矿地质特征与成因分析

Iron Ore-Forming Geological Characteristics and Analysis in Xinyu Iron Ore Field

新余铁矿田含铁岩系地层物质系统沉积的地球化学环境是一个氧化相—弱氧化相—弱还原相—还原相的演变过程。矿田经历了澄江—加里东构造旋回的多期次、多方向、多型式褶皱构造改造。新余铁矿田矿层和含铁岩系的各种成矿地质特征以及矿田东、中、西段构造特征是铁矿的沉积成岩作用以及构造演化历史的物质反映。应用系统分析方法和历史分析方法分析矿田成矿地质系统的内在规律,总结新余铁矿田矿层和含铁岩系变化特征,矿层顶板、底板和含铁岩系标志层特征以及矿田东、中、西段构造特征。解释新余铁矿田单层矿"红绸舞式"褶皱的成因,为铁矿勘查工作提供借鉴。

The geochemical sedimentary environment of the physical system of the the iron ore-bearing rock series is an oxide phase-weak oxidation-weak restore phase-restore phase of evolution in Xinyu iron ore field. Ore field has experienced transformation of multiple,directions,more type fold structure in the Chengjiang-Caledonian tectonic cycle.The various geological features of the iron ore bed and the iron ore-bearing rock series,as well as the structural characteristics of the eastern,middle and western part of the Xinyu iron ore field,is the material reflection of the deposition and the diagenesis and the history of the tectonic evolution about the iron ore bed.this paper explained the inherent law of the ore-forming geological system in the ore field by the application of systems analysis methods and historical analysis methods,summarizes the Changes of the characteristics of the iron ore bed and the iron ore-bearing rock series in Xinyu iron ore field,The character of the bed top and the bed floor and the guide seam of the iron ore-bearing rock series,as well as the structural characteristics of the eastern,middle and western part of the Xinyu iron ore field. aimed at explained the single ore bed ＂Red Silk Dance＂ type of fold in the Xinyu Iron ore field,provide reference for the iron ore exploration.