Acquisition of Equipment for Paleomagnetic Research

购置古地磁研究设备

• 批准号: 9614879
• 负责人: Lisa Tauxe
• 金额: $ 10.7万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614879&HistoricalAwards=false
• 关键词: Acquisition; Equipment; Paleomagnetic; Research

9614879 Tauxe This grant provides $118,555 as partial support of the costs of acquiring equipment for the Paleomagnetic Laboratory at the Scripps Institution of Oceanography (SIO). Specifically, the equipment to be purchased will include a system upgrade for their 2-G enterprises Model 760 superconducting rock magnetometer (SRM) with DC SQUIDS and a rebuilt cryocooler and new compressor, degaussing system electronics and coils and an ARM magnetizer for alternating field experiments, and an automatic sample handler. Additional equipment to be purchased and/or fabricated "in-house" includes a low temperature cryostat for their Micromag alternating field gradient magnetometer (AFGM), a furnace for thermal demagnetization studies, a Kappabridge and other ancillary laboratory equipment. This equipment will allow paleomagnetists at SIO to conduct further research on the relative paleointensity recorded in very weakly magnetized marine sediments from the Ontong-Java Plateau and from sections of the Cretaceous Normal Superchron, Umbria Italy. Additional studies that will be enhanced by the capabilities of the new equipment will include but are not limited to, records of the global paleointensity of the Earth's magnetic field from submarine basaltic glass collected from DSDP/ODP drill sites into basement, analyses of the physical properties of geologic materials from examination of hysteresis loop behavior over a wide range of temperatures, thermal demagnetization studies of lava flows from the Azores and the Canary Islands to determine paleosecular variation of the geomagnetic field since the early Pliocene and rock magnetic characterization of mid-ocean ridge basalts (MORB) from the southern East Pacific Mid-Ocean Ridge (EPR) to aid in explanation of a widespread occurrence of a short-wavelength high in sea-surface magnetic anomalies over ridge axes, termed the Central Anomaly Magnetic High (CAMH). ***

小行星9614879 这笔赠款提供118 555美元，作为斯克里普斯海洋学研究所古地磁实验室购置设备费用的部分支助。 具体而言，将购买的设备将包括其2-G企业760型超导岩石磁力计（SRM）的系统升级，其中包括DC SQUIDS和重建的低温冷却器和新压缩机，消磁系统电子设备和线圈以及用于交变场实验的ARM磁化器，以及自动样品处理器。 将购买和/或“内部”制造的其他设备包括用于Micromag交变场梯度磁力计的低温恒温器、用于热退磁研究的熔炉、Kappabridge和其他辅助实验室设备。 这一设备将使SIO的古地磁学家能够进一步研究Ontong-Java高原和意大利翁布里亚白垩纪正常超年代剖面的非常弱磁化海洋沉积物中记录的相对古强度。 新设备的能力将加强其他研究，包括但不限于，从DSDP/ODP钻探地点收集到基底的海底玄武岩玻璃记录地球磁场的全球古强度，通过检查在宽温度范围内的磁滞回线行为分析地质材料的物理性质，对亚速尔群岛和加那利群岛的熔岩流进行了热退磁研究，以确定上新世早期以来地磁场的古长期变化，并对东太平洋中部洋脊（EPR）南部的洋中脊玄武岩（MORB）进行了岩石磁性表征，以帮助解释一次广泛发生的短-海脊轴上海面磁异常的波长高，称为中央异常磁高（CAMH）。 ***