Collaborative Research: East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains

智力优势：PI提议对罗斯湾的冰川沉积物进行物源研究，这将提供对冰碛物中碎屑矿物的大规模地质年代学调查，以帮助描述东南极冰盖下的基岩并限制南极洲？冰川的历史。该项目利用了以前在实地取样方面的投资。分析工具应用于从现有的冰川冰碛物收集中提取的单一矿物颗粒会产生什么？指纹吗南极洲东部出口冰川和南极洲西部冰碛物的研究，以完善末次盛冰期罗斯湾的古冰流模型、ANDRILL岩心的旧记录，并评估南大洋的IRD来源。新的物源示踪剂将包括一套地质年代学方法，共同提供更深入的了解造山和侵蚀历史的地区。该项目将包括碎屑锆石的U/Pb、U/Pb定年锆石子集的（U-Th）/He以及碎屑角闪石、云母和长石的Ar-Ar。更广泛的影响：这项研究将培养一名硕士。IUPUI的学生，博士学生在哥伦比亚，和几个本科生在这两个机构。参与该项目的研究生将参与指导本科研究人员。研究发现的整合将通过提供适当级别的具体例子和练习带入课堂。Licht和哥伦比亚大学的研究生E.皮尔斯正在与当地中学教师开展外联项目，调查当地冰川物质的来源。该研究将在许多领域具有广泛的适用性。

Intellectual Merit: The PIs proposed a provenance study of glacial deposits in the Ross Embayment that will provide a broad scale geochronologic survey of detrital minerals in till to help characterize bedrock beneath the East Antarctic ice sheet and constrain Antarctica?s glacial history. This project capitalizes on previous investments in field sampling. Analytical tools applied to single mineral grains extracted from existing collections of glacial till will generate ?fingerprints? of East Antarctic outlet glaciers and West Antarctic till to refine paleo-ice flow models for the Ross Embayment during the last glacial maximum, older records from ANDRILL cores, and to assess IRD sources in the Southern Ocean. New provenance tracers will include a suite of geochronological methods that together provide greater insights into the orogenic and erosional history the region. This project will include U/Pb of detrital zircons, (U-Th)/He on a subset of the U/Pb dated zircons, as well as Ar-Ar of detrital hornblende, mica and feldspars. Broader impacts: This research will train one M.S. student at IUPUI, a Ph.D. student at Columbia, and several undergraduates at both institutions. Graduate students involved in the project will be involved in mentoring undergraduate researchers. Incorporation of research discoveries will be brought into the classroom by providing concrete examples and exercises at the appropriate level. Licht and Columbia graduate student E. Pierce are developing outreach projects with local secondary school teachers to investigate the provenance of glacial materials in their local areas. The research will have broad applicability to many fields.