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

P.I.S计划进一步发展BE-B系统，并将这些示踪剂与中美洲、安第斯山脉、俾斯麦、千岛-堪察加、阿留申、风化、横贯墨西哥、小安的列斯群岛和马里亚纳火山弧的熔岩的选定微量元素比率和放射性同位素组成进行对比。这些研究旨在阐明1)地壳、地幔和俯冲储集层的性质，2)这些储集层相互作用的过程，以及3)俯冲循环对地壳和地幔中的地球化学收支的影响。10Be的测量将在宾夕法尼亚大学进行，化学分离将在DTM进行。K、Rb、Cs、Ba、Sr、U、Th和Pb将在DTM进行同位素稀释法和放射性同位素测定，以及Be、Li和一些B浓度的测量。高场强元素、稀土元素和大部分硼浓度的测量将通过莱斯大学进行。将在DTM和大米进行电感耦合等离子体主要元素和痕量元素的表征。

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.