【摘要】：據(jù)新疆薩熱克銅礦區(qū)內綠泥石化蝕變相的產(chǎn)狀可劃分為A型、B型、C型和D型4期。采用綠泥石礦物溫度計和地球化學巖相學研究,認為4種綠泥石蝕變相為陸內紅層盆地中紫紅色鐵質碎屑巖系發(fā)生褪色化蝕變機制之一。A型和B型綠泥石相為中-晚侏羅世—早白堊世構造-熱事件所形成,A型自生粒間狀綠泥石在侏羅系-下白堊統(tǒng)中總體順層分布,形成溫度在163~217℃,與輝銅礦共生且形成于埋藏-壓實成巖期,熱流密度為40.39~48.43 Jm-2s-1,熱通量較小。B型微細脈型綠泥石化蝕變相形成于盆地流體改造期,總體沿切層裂隙和顯微裂隙分布,與輝銅礦和斑銅礦等共生,形成溫度為188~219℃,熱流密度較大,在116.90~330.49 Jm-2s-1。斑銅礦+輝銅礦型(196~237℃)和斑銅礦型(203~226℃)銅礦石帶指示了盆地流體改造富集成礦的中心部位,熱流密度在330.49~878.78 Jm-2s-1,其熱流密度明顯較大。B型綠泥石相與碎裂巖化相和瀝青化蝕變相具有多重耦合結構,形成溫度越高,裂隙滲透率越高,可達30×10-6 cm2/211~227℃,推測存在熱啟裂隙作用。C型和D型綠泥石相為構造-巖漿-熱事件所形成,C型團斑狀-細脈狀綠泥石化蝕變相分布在輝綠輝長巖脈群邊部和外接觸帶含銅漂白-褪色化蝕變帶中,含銅蝕變輝綠巖發(fā)生綠泥石化相蝕變溫度為平均為175℃,平均熱流密度321.46 Jm-2s-1,在克孜勒蘇群褪色化雜礫巖中其綠泥石形成溫度較高(236~238℃),熱流密度高達442.86~922.63 Jm-2s-1;而D型綠泥石化蝕變相分布在碎裂巖化蝕變輝綠輝長巖脈群中,揭示遭受構造熱事件的古地溫在121~185℃,平均熱流密度為239.59 Jm-2s-1。四種類型綠泥石蝕變相揭示薩熱克銅礦區(qū)經(jīng)歷了異常古地場演化和古熱事件。
[Abstract]:According to the occurrence of greenstone alteration in Sajek copper deposit, Xinjiang, it can be divided into four stages: type A, type B, type C, and type D, respectively. Using chlorite mineral thermometers and geochemical lithofacies studies, It is considered that the four types of chlorite alteration are one of the mechanisms of fading and alteration of reddish iron clastic rock series in the continental red bed basin. Type A and B type chlorite facies are formed by tectonic-thermal events of Middle-Late Jurassic-early Cretaceous. The distribution of authigenic intergranular chlorite in the Jurassic-Lower Cretaceous is as a whole. The formation temperature is at 163 ~ 217 鈩，

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