Geochemistry of Calcite Veins: Records of Fluid Mixing and Fluid-Rock Interaction

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• 作者：Olga M. Maskenskaya ; ^{olga.maskenskaya@lnu.se} ; Henrik Drake ; Mats E. Å ; strö ; m
• 关键词：Calcite veins ; Rare earth elemnts ; 87Sr/86Sr-ratios and fluid inclusions
• 刊名：Procedia Earth and Planetary Science
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：7
• 期：Complete
• 页码：566-569
• 全文大小：305 K

文摘

Detailed geochemical investigations of calcite veins, genetically related to intrusions and vein-hosting bedrock, have been used to indicate fluid evolution during intrusion-related hydrothermal mineralization, involving fluid mixing and water rock interaction. The area of investigation is located in the southeast of Sweden. The 1.85 Ga granitoid country rocks and the 0.9 Ga dolerite vein-related intrusions differ in chemical, geochemical, and stable isotope composition. The variation in rare earth and stable isotope composition across calcite veins and the presence of two groups of fluid inclusions suggests mixing of two types of fluids. Light rare earth enrichment and increasing ⁸⁷Sr/⁸⁶Sr-ratios suggest water rock interaction of one/both fluids.