Support of a Regional Microprobe Facility at Woods Hole Oceanographic Institution

9628749清水这笔赠款提供538 966美元，作为今后三年伍兹霍尔海洋研究所东北区域离子微探测器设施继续运作所需的薪金、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 IMS3f离子微探测器的操作和维护。对其新获得的最先进的Cameca IMS1270离子微探头(EAR-9214641)的操作技术开发的支持包括在该设施支持奖中。两台机器的运行将在伍兹霍尔的清水信一的直接监督下进行，但IMS 1270是通过与多个机构合作购买的，这些机构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-多尔蒂地球天文台(LDEO)、麻省理工学院(MIT)和伦塞勒理工学院(RPI)，因此IMS 1270的早期技术开发将包括这些机构以及WHOI的PI。这一奖励比他们目前对IMS3F运行和维护的支持水平略有增加(约9%)，但利用IMS1270的技术开发将是该小组在未来三年的主要推动力。具体地说，在头27个月内，将限制外部用户接触IMS 1270，以便使该伙伴关系能够从事技术开发，包括在地质年代学研究中就地测量锆石中的U/Pb比，测量大洋中脊玄武岩中U系列不平衡中元素的同位素比值，以指示这些岩浆的岩石学历史，并以非常高的分辨率(每半年至可能每周)高精度测量珊瑚中记录的锶/钙比，作为古气候学研究中古海面温度的替代指标。另一项工作将侧重于制定锆石U/Pb年代学和痕量元素分析的标准。在微尺度空间分辨率上分析生物碳酸盐中的微量元素比率，将能够前所未有地确定全球变化的记录。由于IMS 1270具有高质量分辨率和高透过率，因此非常适合于U系列同位素比率的研究以及生物成因碳酸盐中对环境有重要影响的微量元素(即铜、锌、铅)的高空间分辨率元素分析，而IMS 3f将继续提供对地质样品中痕量元素丰度的分析测定，而IMS 1270的高灵敏度不是关键。***

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. ***