【正文】 ............................................................................ 5 蓋層 ............................................................................................................. 6 區(qū)域構造 ............................................................................................................. 6 褶皺 ............................................................................................................. 7 斷裂 ............................................................................................................. 8 區(qū)域巖漿巖 .......................................................................................................... 9 區(qū)域礦產(chǎn) ............................................................................................................. 9 第 3章 礦床地質(zhì)特征 ........................................................................................... 10 概述 .................................................................................................................. 10 位置及交通 ................................................................................................. 10 地層及巖石 ........................................................................................................ 11 地層 ............................................................................................................ 11 變質(zhì)巖的原巖 .............................................................................................. 12 礦區(qū)構造 ........................................................................................................... 12 褶皺構造 ..................................................................................................... 12 斷層 ............................................................................................................ 13 混合巖化作用 .................................................................................................... 13 巖漿巖 ............................................................................................................... 15 礦體特征 ........................................................................................................... 16 礦石質(zhì)量 ............................................................................................................ 18 礦石礦物成分、結(jié)構、構造 .......................................................................... 18 礦石的化學成分 ........................................................................................... 20 礦石的氧化作用 .......................................................................................... 22 礦石類型 ........................................................................................................... 22 礦石的自然類型 .......................................................................................... 22 礦石的工業(yè)類型 .......................................................................................... 23 礦體圍巖和夾石 ................................................................................................. 23 礦體圍巖 ..................................................................................................... 23 目錄 Ⅳ 礦體中夾石 ................................................................................................. 23 礦床成因 ......................................................................................................... 24 馬城與其它冀東沉積變質(zhì)鐵礦床的特征對比 ..................................................... 24 含礦層及 成礦年代 ..................................................................................... 24 磁鐵石英巖特征 ......................................................................................... 26 變質(zhì)作用 ................................................................................................... 27 混合巖化作用 ............................................................................................ 28 巖漿巖 ....................................................................................................... 28 第 4章 結(jié)論 ........................................................................................................... 29 參考文獻 ................................................................................................................. 30 謝 辭 ..................................................................................................................... 31 第 1 章 綜述 1 第 1章 綜述 . 沉積變質(zhì)型鐵礦床 概述 沉積變質(zhì)型鐵礦床 賦存于早前寒武紀變質(zhì)巖中，主要由石英（燧石）和氧化鐵礦物（磁鐵礦、赤鐵礦等）組成，通常具有典型的條帶狀構造，由條帶狀鐵建造（ Banded Iron Formation，簡稱 BIF）變質(zhì)改造而成。 關鍵詞 馬城鐵礦；沉積變質(zhì)；礦床 地質(zhì)特征 Abstract Ⅱ Abstract Based on the experiment and field survey, for analysing the Macheng iron ore strata, migmatization, orebody characteristics and ore minerals,summarizing Macheng’s geological characteristics of deposit. According to information indicates that the Macheng formation for doublelayer structure of iron ore, Ma suburban mining Quaternary cover a large area, Archean bedrock of a single tower subgroup baimiaozi group metamorphic rocks. The ore body shape is plex, the ore types are mainly magite quartzite. Iron ore by a single or multilayer, layered, layered, large lenticular. More shallow with stone, with a pinch of natural branches, expansion and contraction phenomena. Lithology is mainly biotite and biotite granulite amphibolite leptynite folder magite quartzite through microscope. By parison with the Sijiaying, Shirengou, Shuichang Iron Mine and other typical sedimentarymetamorphism iron deposit, the Macheng iron ore in the relatively new, migmatization strongly, and destroy the orebody’s integrity and continuity, also the degree of metamorphism is higher. Keywords Macheng iron ore。 鏡下觀察得出其變質(zhì)巖主要為黑云變粒巖和黑云角閃變粒巖夾磁鐵石英巖。礦體 形態(tài)復雜 ，礦石類型主要為磁鐵石英巖，礦體 由單層或多層鐵礦層組成，呈層狀