Geochemical Variation Among Pre- and Post-Nevadan Plutons, Klamath Mountains, California

加利福尼亚州克拉马斯山脉前后内华达岩体的地球化学变化

• 批准号: 8720141
• 负责人: Calvin Barnes
• 金额: $ 8万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-15 至 1990-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720141&HistoricalAwards=false
• 关键词: Geochemical; Variation; Among; Pre; Post

Mesozoic plutons in the Klamath Mountains province (CA) intruded a structurally deformed oceanic crustal section and represent the eroded roots of an island arc volcanic belt. Emplacement of these magma brackets a major tectonic episode (the Nevadan orogeny) during which the style of magmatism changed significantly. This proposal will involve a detailed geochemical and petrologic study of four plutons spanning this time interval. Mineralogical data will be acquired to evaluate physical conditions (pressure, temperature, etc.) attending magma formation during the transition in magmatic style. Geochemical and isotopic data will be used to elucidate processes of magma evolution. This integrated study will hopefully provide important insights into the deep crustal processes associated with island arc magmatism.

克拉马斯山脉省(CA)的中生代深成岩体侵入了一个构造变形的洋壳剖面，代表了岛弧火山带的侵蚀根。这些岩浆支架的侵位是一个重大的构造事件(内华达造山作用)，在此期间岩浆作用的样式发生了显着的变化。这项建议将涉及对这段时间内的四个深成岩进行详细的地球化学和岩石学研究。将获取矿物学数据以评估物理条件(压力、温度等)。以岩浆风格参与过渡过程中的岩浆形成。将使用地球化学和同位素数据来阐明岩浆演化过程。这项综合研究有望对与岛弧岩浆作用有关的地壳深部过程提供重要的见解。