Subduction Recycling at Convergent Margins: Extensions of Be isotope and B-Li-Be Systematics of Volcanic Arc Magmas (COLLABORATIVE RESEARCH)

PI计划进一步发展Be-B系统， 这些示踪剂与选定的微量元素比值的相关性 和放射性同位素组成的熔岩从中央 美洲、安第斯山脉、俾斯麦、千岛-堪察加、阿留申、伊奥利亚、 横贯墨西哥，小安的列斯群岛和马里亚纳火山弧。 这些 研究的目的是阐明1）地壳，地幔的性质 和俯冲油藏，2）这些过程 储层相互作用; 3）俯冲再循环的影响 地壳和地幔的地球化学收支。 10Be 测量将在宾夕法尼亚大学进行， 在DTM进行化学分离。K、Rb、Cs、Ba、Sr、U、Th和Pb 同位素稀释和放射性同位素测量 将在DTM进行测定，沿着Be、Li和一些B 浓度测量。 高场的测定 强度元素、稀土元素和大部分B 浓度测量将通过Rice处理 大学 ICP主要和微量元素表征将 在DTM和Rice进行。

The P.I.s plan further development of the Be-B systematics and correlation of these tracers with selected trace element ratios and radiogenic isotope compositions for lavas from the Central America, ANdes, Bismarck, Kurile-Kamchatka, Aleutian, Aeolian, Trans-Mexico, Lesser Antilles and Mariana volcanic arcs. These studies are intended to elucidate 1) the nature of crust, mantle and subducted reservoirs, 2) the process by which these reservoirs interact, and 3) the effects of subduction recycling on geochemical budgets in the crust and mantle. 10Be measurements will be made at the University of Pennsylvania, with chemical separations made at DTM. K, Rb, Cs, Ba, Sr, U, Th and Pb measurements by isotope dilution and radiogenic isotope determinations will be made at DTM, along with Be, Li and some B concentration measurements. Determinations of high field strength elements, rare earth elements and the majority of B concentration measurements will be handled through Rice University. ICP major and trace element characterizations will be carried out at DTM and Rice.