...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Geology Review >Three-dimensional temperature field simulation of a cooling of a magma chamber, La Primavera caldera, Jalisco, Mexico
【24h】

Three-dimensional temperature field simulation of a cooling of a magma chamber, La Primavera caldera, Jalisco, Mexico

机译：墨西哥哈利斯科州La Primavera火山口的岩浆室冷却的三维温度场模拟

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The La Primavera caldera lies close to the triple junction of the Tepic-Zacoalco, Colima, and Chapala rifts in the western part of the Mexican Volcanic Belt. It is a promising geo thermal field with 13 deep wells already drilled. We calculated solute geothermometric temperatures (Na-K, Na-Li, and SiO_2) from the chemistry of geothermal water samples;;determined values are generally between 99°C and 202°C for springs and between 131°C and 298°C for wells. Thermal modelling is an important geophysical tool as documented in the study of this and other Mexican geothermal areas. Using the computer program TCHEMSYS, we report new simulation results of three-dimensional (3-D) thermal modelling of the magma chamber underlying this caldera through its entire eruptive history. Equations (quadratic fit) describing the simulated temperatures as a function of the age, volume and depth of the magma chamber are first presented;;these indicate that both the depth and the age of the magma chamber are more important parameters than its volume. A comparison of 3-D modelling of the La Primavera and Los Humeros calderas also shows that the depth of the magma chamber is more important than its volume. The best model for the La Primavera caldera has 0.15 million years as the emplacement age of the magma chamber, its top at a depth of 4 km, and its volume as 600 km~3. Fresh magma recharge events within the middle part of the magma chamber were also considered at 0.095, 0.075, and 0.040 Ma. The simulation results were evaluated in the light of actually measured and solute geothermometric temperatures in five geothermal wells. Future work should involve a smaller mesh size of 0.050 or 0.10 km on each side (instead of 0.25 km currently used) and take into account the topography of the area and all petrogenetic processes of fractional crystallization, assimilation, and magma mixing as well as heat generation from natural radioactive elements.
机译：La Primavera火山口位于墨西哥火山带西部的Tepic-Zacoalco，Colima和Chapala裂谷的三重交汇处附近。这是一个充满希望的地热领域，已经钻了13口深井。我们根据地热水样品的化学成分计算了溶质地热温度（Na-K​​，Na-Li和SiO_2）;弹簧的测定值通常在99°C至202°C之间，而弹簧的测定值通常在131°C至298°C之间井。如对这个和其他墨西哥地热地区的研究所记录的那样，热模拟是一个重要的地球物理工具。使用计算机程序TCHEMSYS，我们报告了整个火山爆发历史中，火山口下方岩浆腔的三维（3-D）热建模的新模拟结果。首先介绍了描述模拟温度随岩浆室的年龄，体积和深度的函数的方程（二次拟合）;这些方程表明岩浆室的深度和年龄比其体积更重要。 La Primavera和Los Humeros火山口的3-D建模比较也表明，岩浆室的深度比其体积更重要。 La Primavera破火山口的最佳模型是岩浆室的进入年龄15万年，其顶部深度为4 km，体积为600 km〜3。岩浆腔中部的新鲜岩浆补给事件也被认为是0.095、0.075和0.040 Ma。根据五个地热井中的实际测得的温度和溶质地热测定温度对模拟结果进行了评估。未来的工作应在每侧上使用较小的网格，大小为0.050或0.10 km（而不是当前使用的0.25 km），并考虑该区域的地形以及部分结晶，同化，岩浆混合以及热量的所有成岩过程由天然放射性元素生成。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号