Support of a Regional Microprobe Facility at Woods Hole Oceanographic Institution

小行星9628749 这笔赠款提供538 966美元，作为与伍兹霍尔海洋研究所东北区域离子微探针设施今后三年继续运作有关的薪金、设备和用品费用的部分支助。 以前对该设施的支持仅用于Cameca ims 3f离子微探针的操作和维护。 对他们新获得的最先进的Cameca ims 1270离子微探针（AMS-9214641）的操作技术开发的支持包括在该设施支持奖中。 两台机器的操作将在伍兹霍尔的清水伸道的直接监督下进行，但ims 1270是通过合作机构的捐款购买的，包括伍兹霍尔海洋研究所（WHOI），美国自然历史博物馆（AMNH），布朗大学，拉蒙特-多尔蒂地球观测站（LDEO），马萨诸塞州理工学院（MIT）和伦斯勒理工学院（RPI），使得IMS 1270上早期技术开发将包括来自这些机构的PI以及WHOI。 该合同比他们目前对ims 3f的操作和维护的支持水平有适度的增长（约9%），但在未来三年内，利用ims 1270的技术开发将是该小组的主要目标。 具体来说，在最初的27个月内，外部用户对ims 1270的访问将受到限制，以使合作伙伴能够进行技术开发，包括为地质年代学调查原位测量锆石中的U/Pb比值，铀系不平衡区元素同位素比值的测定洋脊玄武岩作为这些岩浆的岩石学历史的指示物，并以非常高的分辨率对珊瑚中记录的Sr/Ca比率进行高精度测量（次年度到可能次每周）作为古海洋表面温度的代用指标在古气候学研究中。 另一项工作将集中在U/Pb锆石地质年代学和微量元素分析标准的制定上。 以微尺度空间分辨率分析生物成因碳酸盐中的微量元素比率，将允许前所未有地确定全球变化的记录。 而ims 1270由于其高质量分辨率和高透射率，特别适合于研究铀系同位素比值以及环境重要微量元素的高空间分辨率元素分析（即Cu、Zn、Pb），国际监测系统3f将继续提供对地质样品中痕量元素丰度的分析测定，IMS 1270的性能不是关键的。 ***

9628749 Shimizu This grant provides $538,966 as partial support of costs of salaries, equipment and supplies associated with the continued operation of the North East Regional Ion Microprobe Facility (NERIMF) at the Woods Hole Oceanographic Institution over the next three years. Previous support of this facility was solely for the operation and maintenance of a Cameca ims 3f ion microprobe. Support for the development of operational techniques on their newly acquired,state-of-the-art, Cameca ims 1270 ion microprobe (EAR-9214641) is included in this awards for facility support. The two-machine operation will be under the direct supervision of Nobumichi Shimizu at Woods Hole but the ims 1270 was purchased through contributions from a partnership of institutions including, Woods Hole Oceanographic Institution (WHOI), the American Museum of Natural History (AMNH), Brown University, Lamont-Doherty Earth Observatory (LDEO), the Massachusetts Institute of Technology (MIT) and Rennselaer Polytechnic Institute (RPI) so that early technique development on the ims 1270 will include PI's from these institutions as well as WHOI. This award represents a modest increase (ca 9%) over their current level of support for operation and maintenance of the ims 3f, yet development of techniques utilizing the ims 1270 will be the primary thrust of this group over the next three years. Specifically, outside user access to the ims 1270 will be restricted for the first 27 months to allow the partnership to pursue technique developments including, in situ measurement of U/Pb ratios in zircons for geochronologic investigations, measurement of isotopic ratios of elements in the U-series disequilibria in Mid-Ocean Ridge Basalts as indicators of the petrologic history of these magmas and high precision measurements of the Sr/Ca ratio recorded in corals at very high resolutions (sub-annual to possibly sub-weekly) as proxies of paleo sea surface temperatures in paleoclimatologic studies. A dditional work will focus on the development of standards for both U/Pb zircon geochronology and for trace elemental analyses. Analyses of trace element ratios in biogenic carbonates at micro-scale spatial resolution will allow unprecedented determination of records of global change. While the ims 1270,due to its high mass resolution and high transmission is uniquely suited to studies of U-series isotopic ratios as well as high spatial resolution elemental analyses of environmentally important trace elements (i.e. Cu, Zn, Pb) in biogenic carbonates, the ims 3f will continue to provide for the analytical determination of trace elemental abundances in geological samples where the high sensitivity of the ims 1270 is not critical. ***