Geochronology of the Formation and Modification of the Deep Crust Beneath Kilbourne Hole, New Mexico

9628209卡梅隆的PI的建议，结合SHRIMP和IDTIMS的U/Pb锆石研究从Kilborne孔麻粒岩，以获得完整和精确的地质年代学信息，需要解开下的格兰德河裂谷地壳深部的演变。PI将完善Lu/Hf系统在定年过程中的应用，例如受这些过程影响的岩石中的熔融和变质。Kilborne Hole的麻粒岩捕虏体是进行这些U/Pb锆石和Lu/Hf年代学研究的理想材料，因为（1）它们丰富且相对较大，（2）卡梅隆先前的Sm/Nd研究表明，地壳的形成和改造可以在很长的时间间隔内记录下来（1700 Ma至新生代），和（3）PI以前的Lu/Hf研究表明，一些含石榴子石麻粒岩的新生代事件的影响。一般而言，为了通过麻粒岩捕虏体的研究进一步了解地壳深部过程，可能需要提高数据的质量。

9628209 Cameron The PI's propose a combined SHRIMP and IDTIMS U/Pb zircon study of granulites from Kilborne Hole in order to get the complete and precise geochronological information required to unravel the evolution of the deep crust beneath the Rio Grande rift. The PI's will refine applications of the Lu/Hf system to dating processes such as melting and metamorphism in rocks affected by these processes. Granulite xenoliths from Kilborne Hole are ideal for these U/Pb zircon and Lu/Hf geochronology studies because (1) they are abundant and relatively large, (2) a previous Sm/Nd study by Cameron suggests that crust formation and modification can be documented over a long time interval (1700 Ma to Cenozoic), and (3) the PI's previous Lu/Hf study has demonstrated that some of the garnet-bearing granulites were affected by Cenozoic events. The quality of the data will probably be needed in general for further advances in the understanding of deep crustal processes through the study of granulite xenoliths.