The Role of Fluids in Brittle Versus Ductile Deformation in the Whipple Mountains Metamorphic Core Complex

流体在惠普尔山变质核杂岩脆性变形与延性变形中的作用

• 批准号: 9316651
• 负责人: Jean Morrison
• 金额: $ 11万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-02-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9316651&HistoricalAwards=false
• 关键词: Role; Fluids; Brittle; Versus; Ductile

9316651 Morrison Recent studies have indicated that meteoric water may have penetrated to depths as great as 16 km in the zone of mylonitic deformation of the Whipple Mountain metamorphic core complex area. However, the existing oxygen depletion data can be interpreted to be due to either 1) post mylonitization meteoric water exchange related to brittle detachment faulting, syn-mylonitic exchange with meteoric water which penetrated downward into the ductile regime or 3) fluid-rock exchange in the lower plate at the transition between the brittle and ductile regimes. This continued project will produce oxygen and hydrogen isotopic analyses of mineral separates in well characterized samples with distinct deformational histories. Results will help discriminate between the possibilities and place constraints on the role of fluids in the development of the Whipple Mountain metamorphic core complex.

9316651 Morrison 最近的研究表明，在惠普尔山变质核杂岩区的糜棱岩变形带中，大气水可能渗透到16公里深处。 然而，现有的氧气消耗数据可以解释为：1）与脆性滑脱断层相关的糜棱岩化后大气水交换，同糜棱岩与向下渗透到韧性区域的大气水交换或3）流体-岩石交换下板处于脆性和延性状态之间的过渡处。 这个持续的项目将对具有独特变形历史的特征良好的样品中的矿物分离物进行氧和氢同位素分析。 结果将有助于区分可能性并限制流体在惠普尔山变质核复合体发育中的作用。