本文關(guān)鍵詞：云南個舊錫銅多金屬礦區(qū)新山和高峰山巖體中高溫?zé)嵫莼芳捌渑c成礦的關(guān)系　出處：《大地構(gòu)造與成礦學(xué)》2016年06期 　論文類型：期刊論文

  更多相關(guān)文章： 鋯石LA-MS-ICP U-Pb定年 Ar/Ar年代學(xué) 熱演化史 冷卻速率 錫銅礦床 個舊

【摘要】：云南個舊是全球最大的錫銅多金屬礦床,主要成礦作用是與燕山期花崗巖密切有關(guān)的巖漿 熱液體系。本文依據(jù)鋯石U-Pb測年和~(40)Ar/~(39)Ar年代學(xué)對礦區(qū)內(nèi)新山和高峰山花崗巖體進行測試分析,數(shù)據(jù)揭示礦區(qū)內(nèi)南部和北部的花崗巖體的高 中溫階段熱演化史曲線具有相似的演化趨勢,只是冷卻時間存在3~6 Ma的間隔。南部新山巖體于89~85 Ma形成,此后巖體經(jīng)歷了快速冷卻過程,冷卻速率為58.70~62.08℃/Ma。之后進入中溫400~250℃的緩慢冷卻過程,冷卻速率為17.39~19.32℃/Ma,并持續(xù)到68~69 Ma。北部巖體的熱演化史曲線明顯滯后于南部巖體,北部高峰山巖體于83~82 Ma形成,之后經(jīng)歷快速冷卻過程,冷卻速率為295.59℃/Ma和103.29℃/Ma,于80 Ma進入400~250℃,此后以冷卻速率為7.14~5.69℃/Ma,進入極其緩慢冷卻過程并持續(xù)至67 Ma。礦區(qū)內(nèi)花崗巖體先遭受快速冷卻后進入中溫階段的緩慢長時間冷卻作用過程,為錫銅主期成礦作用提供了持續(xù)的熱源和流體運移動力學(xué)過程,也與礦區(qū)南、北部的成礦作用差異相吻合。
[Abstract]:Gejiu is the largest tin copper polymetallic deposit in the world. The main metallogenic processes are magmatic hydrothermal systems closely related to Yanshanian granites. Ar chronology is used to test and analyze the Xinshan and Gaofengshan granite bodies in the mining area. The data reveal that the thermal evolution history curves of the granites in the south and north of the mining area have a similar evolution trend at the high and middle temperature stages. However, the cooling time was only 3 ~ 6 Ma. The Xinshan rock mass in the south of China was formed at 8910 ~ 85 Ma, and the rock mass experienced a rapid cooling process since then. The cooling rate is 58.70 ~ 62.08 鈩，

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