本論文以Fe同位素為手段,研究大別造山帶進變質(zhì)作用過程中形成的不同變質(zhì)相巖石及榴輝巖中單斜輝石-石榴子石之間的Fe同位素分餾。為了改進Fe同位素分析,在利用標樣-樣品間插法（SSB）校正MC-ICPMS質(zhì)量歧視的基礎(chǔ)上建立了雙稀釋劑法+SSB法和Ni外標法+SSB法。根據(jù)長期監(jiān)測的標樣數(shù)據(jù),當每個樣品溶液在儀器上測試四次或九次后,δ56Fe長期外部精度分別<0.05‰和0.03‰。此外,本文報道了純Fe溶液標樣NIST SRM3126a大批量（N=51）、高精度的Fe同位素測試結(jié)果,并提出了新的推薦值:δ56Fe =0.363 ± 0.006,2se,95%c.i.;δ57Fe = 0.534 ± 0.009,2se,95%c.i.。大別造山帶綠片巖,角閃巖,榴輝巖三種不同變質(zhì)相變質(zhì)巖的含水量隨變質(zhì)程度上升而逐漸減少,且原巖類似,均為元古代（750-800Ma）揚子北緣的基性火山巖。三種巖石的Fe同位素組成基本一致,隨變質(zhì)程度加深,平均值（δ56Fe）分別為 0.081 ± 0.075（2SD,n = 13）,0.091 ± 0.037（2SD,n = 19）,0.071 ± 0... 

【文章頁數(shù)】：102 頁

【學位級別】：碩士

【文章目錄】：
摘要
Abstract
第一章 前言
    1.1 研究現(xiàn)狀和存在問題
    1.2 研究內(nèi)容
    1.3 本論文取得的主要認識
    1.4 研究方法及工作量
第二章 Fe同位素分析方法
    2.1 引言
    2.2 實驗
        2.2.1 化學純化
        2.2.2 質(zhì)譜儀測試
        2.2.3 儀器質(zhì)量歧視校正
            2.2.3.1 雙稀釋劑方法
            2.2.3.2 Ni外標法
        2.2.4 內(nèi)精度
    2.3 結(jié)果與討論
        2.3.1 質(zhì)量歧視短期波動的校正
        2.3.2 精度和準確度
        2.3.3 NIST SRM3126a新推薦值
    2.4 小結(jié)
第三章 大別造山帶區(qū)域地質(zhì)概況
第四章 俯沖帶固相進變質(zhì)過程Fe同位素分餾研究
    4.1 樣品
    4.2 Fe同位素數(shù)據(jù)結(jié)果
        4.2.1 綠片巖Fe同位素組成
        4.2.2 角閃巖Fe同位素組成
        4.2.3 榴輝巖Fe同位素組成
    4.3 討論
        4.3.1 固相進變質(zhì)過程中Fe同位素分餾
        4.3.2 變質(zhì)巖Fe同位素變化的成因
        4.3.3 固相進變質(zhì)過程中的氧化還原反應(yīng)及對島弧玄武巖高氧逸度的指示
    4.4 小結(jié)
第五章 大別造山帶榴輝礦物對的Fe同位素分餾研究
    5.1 引言
    5.2 樣品
        5.2.1 毛屋
        5.2.2 雙河
        5.2.3 碧溪嶺
        5.2.4 紅安
    5.3 Fe同位素數(shù)據(jù)結(jié)果
    5.4 討論
        5.4.1 礦物間是否達到Fe同位素平衡
        5.4.2 影響Fe同位素分餾大小的因素
    5.5 小結(jié)
第六章 結(jié)論
致謝
參考文獻
附錄


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期刊論文
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