Ubehebe Peak Contact Aureole as a Test of Stochastic Modeling of Fluid-Rock Interaction

Ubehebe 峰接触光环作为流体-岩石相互作用随机模型的检验

• 批准号: 9614649
• 负责人: Lukas Baumgartner
• 金额: $ 18.9万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614649&HistoricalAwards=false
• 关键词: Ubehebe; Peak; Contact; Aureole; Test

9614649 Baumgartner The aim of this research is to study the effect of spatially heterogeneous and temporally evolving permeability through field and geochemical studies in the Ubehebe Peak contact aureole and to develop a finite element code capable of modeling the basic physical, thermodynamic and transport processes occurring in a typical upper crustal contact aureole. This includes mass and heat transport, reactive tracer transport, metamorphic reactions, reaction enhancement of permeability, and collapse of permeability. The objectives of the proposal are to: (a) complete a geostatistically based data set of stable isotope compositions of carbonates and silicates in the aureole; (b) establish a geostatistically valid major and trace element data base; (c) expand the capabilities of the finite element code to model infiltration driven mixed volatile reactions, porosity and permeability changes due to reaction progress of such reactions; (d) to include in the code simple rheological models to simulate pore collapse due to plastic, brittle, or elastic failure of a rock undergoing reactions. The evolution of porosity, and hence permeability, in such models can be predicted using the fully coupled transport code together with phenomenological equations linking permeability and porosity, reaction progress and porosity, as well as elastic and plastic pore collapse.

9614649 Baumgartner-本研究的目的是通过现场和地球化学研究的Ubehebe峰接触晕的空间异质性和时间演变的渗透性的影响进行研究，并开发一个有限元代码能够模拟的基本物理，热力学和运输过程发生在一个典型的上地壳接触晕。这包括质量和热量传输，反应示踪剂传输，变质反应，渗透率的反应增强和渗透率的崩溃。该提案的目标是：（a）完成一套以地质统计学为基础的关于光环中碳酸盐和硅酸盐稳定同位素组成的数据;（B）建立一个在地质统计学上有效的主要元素和微量元素数据库;（c）扩大有限元代码的能力，以模拟渗透驱动的混合挥发性反应、孔隙度和渗透率因这些反应的反应进程而发生的变化;（d）在规范中列入简单的流变模型，以模拟由于岩石发生反应而产生的塑性、脆性或弹性破坏所造成的孔隙塌陷。孔隙度的演变，因此渗透率，在这样的模型中，可以预测使用完全耦合的传输代码连同连接渗透率和孔隙度，反应进程和孔隙度，以及弹性和塑性孔塌陷的唯象方程。