...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical transactions of the Royal Society. Mathematical, physical, and engineering sciences >Magma chambers versus mush zones: constraining the architecture of sub-volcanic plumbing systems from microstructural analysis of crystalline enclaves
【24h】

Magma chambers versus mush zones: constraining the architecture of sub-volcanic plumbing systems from microstructural analysis of crystalline enclaves

机译：Magma Chambers与糊状区：限制晶体外壳微观结构分析的亚火山管道系统的体系结构

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

There are clear microstructural differences between mafic plutonic rocks that formed in a dynamic liquid-rich environment, in which crystals can be moved and re-arranged by magmatic currents, and those in which crystal nucleation and growth are essentially in situ and static. Crystalline enclaves, derived from deep crustal mushy zones and erupted in many volcanic settings, afford a unique opportunity to use the understanding of microstructural development, established from the study of intrusive plutons, to place constraints on the architecture of sub-volcanic systems. Here, we review the relevant microstructural literature, before applying these techniques to interrogate the crystallization environments of enclaves from the Kameni Islands of Santorini and Rabida Volcano in the Galapagos. Crystals in samples of deep-sourced material from both case studies preserve evidence of at least some time spent in a liquid-rich environment. The Kameni enclaves appear to record an early stage of crystallization during which crystals were free to move, with the bulk of crystallization occurring in a static, mushy environment. By contrast, the Rabida enclaves were sourced from an environment in which hydrodynamic sorting and re-arrangement by magmatic currents were common, consistent with a liquid-rich magma chamber. While presently active volcanoes are thought to be underlain by extensive regions rich in crystal mush, these examples preserve robust evidence for the presence of liquid-rich magma chambers in the geological record.
机译：在动态液体的环境中形成的MAFIC型岩石之间存在明显的微观结构差异，其中晶体可以通过岩浆电流移动并重新排列，并且晶体成核和生长基本上是原位和静态的那些。从深层地壳糊状区衍生的晶体环绕声并在许多火山环境中爆发，提供了从侵入式资质研究的研究中建立了对微观结构发展的理解的独特机会，以将限制对亚火山系统的结构制约。在这里，我们审查了相关的微观结构文学，然后应用了这些技术来询问来自圣托里尼和拉帕戈斯的哈比塔火山的康涅尼群岛的飞机结晶环境。两种案例研究中深源材料样品中的晶体保留了至少一段时间在富含液体的环境中的证据。 Kameni肠道似乎记录了结晶早期阶段，在此期间晶体自由移动，其中大部分结晶发生在静态，糊状的环境中。相比之下，从岩浆电流的流体动力分选和重新布置常见的环境中，rabida穴位是普通的，与富含液体的岩浆室一致。虽然目前活跃的火山被认为是富含水晶糊状物的广泛地区，但这些例子保留了地质记录中富含液体岩浆室的稳健证据。

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