Acquisition of a Gas Source Mass Spectrometer and Carbonate Preparation Device

[0824978zachos]本提案为一种带有Kiel碳酸盐装置的新型气源双入口同位素比值质谱仪寻求资助。需要Thermo MAT 253和Kiel IV准备设备。该系统将能够对碳酸盐岩进行常规碳和氧同位素分析，具有高精度和低样本量（~5µg C）。采集将允许使用单独的酸反应容器，提高精度和最小化样本量。该仪器将增加现有的分析能力。新仪器的研究主题大致分为古气候学、古海洋学和古生态学。一个重点是了解白垩纪晚期和新生代早期的生物地球化学和气候演化？世界;古新世-始新世极热期（PETM）的成因和演化。PI计划测量化石记录中跨越PETM的贝壳碳酸盐。壳分析避免了由于沉积物重加工或生物扰动引起的伪影，但需要低样本量。一个相关的项目将研究包括营养物质在内的生物地球化学循环与始新世新世期间气候强迫的耦合关系。该仪器还将用于了解古气候和古环境对生态、现存和古代脊椎动物（已灭绝）进化的影响。此外，有孔虫同位素分析将用于重建与末次盛冰期（LGM）相关的古气候。除了PI和联合PI的研究重点外，UCSC和其他地方的一些其他PI也将得到支持。管理计划用新仪器取代Optima（即将退役）。因此不需要额外的实验室空间。目前雇用了一名首席技术人员和实验室经理，并要求在第一年提供部分支持。Zachos将监督Kiel IV设备的安装和初始管理。预计赠款支持和每个样品的费用将长期支持该设施。UCSC稳定同位素实验室奉行开放获取政策。这有助于吸引来自加州大学圣迭戈分校、其他区域机构和国际科学界的用户。大约50%的用户是女性。充电率保持在较低水平，实验室经理提供广泛的培训。加州大学范围内的项目，如加州少数民族参与联盟，确保了多元化的内部用户基础

0824978ZachosThis proposal seeks funding for a new gas source dual-inlet isotope ratio mass spectrometer with a Kiel carbonate device. Requested is a Thermo MAT 253 with a Kiel IV prep device. The system will be capable of routine carbon and oxygen isotope analyses from carbonates with high precision and low sample size (~5 µg C). The acquisition will allow the use of individual acid reaction vessels, increasing precision and minimizing sample sizes. The instrument will add to existing analysis capability. General research themes outlined for the new instrumentation fall into the areas of paleoclimatology, paleoceanography and paleoecology. One focus is understanding the biogeochemistry and climate evolution of the late Cretaceous and early Cenozoic ?greenhouse? worlds; the causes and evolution of the Paleocene-Eocene Thermal Maximum (PETM). The PI intends to measure shell carbonates spanning the PETM in the fossil record. Shell analysis obviates artifacts due to sediment reworking or bioturbation, but requires low sample volumes. A related project will look at the coupling of biogeochemical cycling, including nutrients, and climatic forcings during the PETM. The instrument will also be applied to understanding paleoclimatic and paleoenvironmental forcings on the ecology, evolution of extant and ancient vertebrates (extinct). In addition, foraminiferal isotope analysis will be used to reconstruct paleoclimates associated with the Last Glacial Maximum (LGM). Aside from the PI and co-PI research thrusts, a number of other PIs at UCSC and elsewhere will be supported. The management plan has the new instrument replacing an Optima (which will be retired). No additional laboratory space will thus been needed. A lead technician and lab manager is currently employed and partial support is requested in Year 1. Zachos will oversee the installation and initial management of the Kiel IV device. It is expected that grant support and per-sample fees will support the facility long-term. The UCSC Stable Isotope Laboratory operates on an open access policy. This helps attract users from UCSC, other regional institutions and the international scientific community. Users have been roughly ~50% female. Recharge rates are kept low and the laboratory manager provides extensive training. UC-wide programs such as the California Alliance for Minority Participation ensures a diverse in-house user base.***