Abstract

The chemical and isotopic characteristics (δ¹⁸O and δ²H) of water from 42 mud volcanoes of the Kerch–Taman region (Crimean–Caucasus district) were analyzed. The formation temperatures of mud volcanic waters were estimated using the Mg-Li hydrochemical geothermometer (t(Mg-Li) = 40–134°C). It was revealed that dehydration waters released during the smectite–to-illite transformation play significant role in the total fluid balance of the mud volcanic systems (up to 80% of the total fluid volume). These waters are characterized by low Cl ion contents, δ¹⁸O from +13 to +17‰, and δ²H from –25 to –20‰ relative to VPDB, and high concentrations of \({\text{HCO}}_{3}^{ - }\), B, Li, Ba and other trace elements. Correlations between the concentration of HCO₃, B, δ¹⁸O, and t(Mg-Li) values were revealed.

中文翻译：

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刻赤-塔曼地区的泥火山流体：地球化学重建和区域趋势。交流一：泥火山水的地球化学特征及成因

摘要

分析了刻赤-塔曼地区（克里米亚-高加索地区）的 42 座泥火山中水的化学和同位素特征（δ ¹⁸ O 和 δ ² H）。泥火山水的形成温度是使用镁锂水化学地球温度计估算的（t（镁锂）= 40-134°C）。结果表明，蒙脱石到伊利石转化过程中释放的脱水水对泥火山系统的总流体平衡（高达总流体体积的 80%）起着重要作用。这些水的特点是相对于 VPDB，Cl 离子含量低，δ ¹⁸ O 从 +13 到 +17‰，δ ² H 从 –25 到 –20‰，以及高浓度的\({\text{HCO}}_ {3}^{ - }\)、B、Li、Ba等微量元素。揭示了 HCO ₃浓度、B、δ ¹⁸ O 和 t(Mg-Li) 值之间的相关性。