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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >Unraveling the dynamics of magmatic CO 2 degassing at Mammoth Mountain, California
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Unraveling the dynamics of magmatic CO 2 degassing at Mammoth Mountain, California

机译：解开Magmatic Co 2 在加利福尼亚州Mammoth Mounta的脱气脱气

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AbstractThe accumulation of magmatic CO2beneath low-permeability barriers may lead to the formation of CO2-rich gas reservoirs within volcanic systems. Such accumulation is often evidenced by high surface CO2emissions that fluctuate over time. The temporal variability in surface degassing is believed in part to reflect a complex interplay between deep magmatic degassing and the permeability of degassing pathways. A better understanding of the dynamics of CO2degassing is required to improve monitoring and hazards mitigation in these systems. Owing to the availability of long-term records of CO2emissions rates and seismicity, Mammoth Mountain in California constitutes an ideal site towards such predictive understanding. Mammoth Mountain is characterized by intense soil CO2degassing (up to ～1000 t?d?1) and tree kill areas that resulted from leakage of CO2from a CO2-rich gas reservoir located in the upper ～4 km. The release of CO2-rich fluids from deeper basaltic intrusions towards the reservoir induces seismicity and potentially reactivates faults connecting the reservoir to the surface. While this conceptual model is well-accepted, there is still a debate whether temporally variable surface CO2fluxes directly reflect degassing of intrusions or variations in fault permeability. Here, we report the first large-scale numerical model of fluid and heat transport for Mammoth Mountain. We discus
机译：<！[cdata [ Abstract Magmatic Co 2 下面的低渗透障碍可能导致CO 2 -RICH气体储层在火山系统中。这种积累通常由高表面CO 2 排放随时间而波动的排放。相信表面脱气的时间变异部分是反映深岩浆脱气与脱气途径的渗透性之间的复杂相互作用。更好地了解CO 2 脱气所需的脱气，以改善这些系统中的监测和危险。由于有关CO 2 排放率和地震性的长期记录，加利福尼亚州的Mammoth Mountains构成了这种预测理解的理想场所。 Mammoth Mountain的特点是强烈的土壤CO 2 脱气（最高〜1000 T. d ？1 ）和树杀死co 2 从CO 2 - 煤气储层位于楼上〜4公里。 CO 2 -RICH流体从深层玄武岩入侵朝向储存器引起地震性，并且可能再激活将储存器连接到表面的故障。虽然这种概念模型被普遍接受，但仍然存在争论，无论是时间可变的表面CO 2 通量直接反映侵蚀入侵或故障渗透性的变化。在这里，我们报告了猛犸山流体和热传输的第一个大规模数值模型。我们讨犯了

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