Acquisition of Thermal and Alternating Field Demagnetizers

9902723切尔这笔赠款提供部分支持，用于购买设备，以更新佛罗里达大学地质系的古地磁实验室。 具体设备将包括一个交变磁场（AF）消磁器和一个热消磁器。 UF paleomag实验室配备了一个u通道超导岩石磁力仪（SRM）和一个专用于离散样品分析的SRM。 在美国，目前只有另外两个实验室，即加州戴维斯大学（Verosub）和夏威夷大学（Herrerro-Bervera），使用U形通道仪器。 PI公司的Rexell和Opdyke利用其快速吞吐量的U通道SRM，在磁性地层学和地磁场长期变化的研究中分析长时间、高分辨率的古地磁记录。 一个新的AF脱磁器将取代不再支持的Schonstedt AF脱磁器，一个60个样本容量的热脱磁器将用于通过大型合作项目中的Thellier-Thellier方法进行古强度分析，以表征从上新世到现在的地磁场长期变化。 该项目需要沿着从北极到南极洲的南北样带沿美洲进行大规模的实地采样。***

9902723ChannellThis grant provides partial support for the costs of acquiring equipment to upgrade the paleomagnetics laboratory in the Department of Geology at the University of Florida (UF). Specific equipment will include an alternating field (AF) demagnetizer and a thermal demagnetizer. The UF paleomag lab is well equipped with both a u-channel superconducting rock magnetometer (SRM) and an SRM dedicated to the analysis of discrete samples. In the U.S., only two other laboratories currently operate u-channel instruments, the University of California Davis (Verosub) and the University of Hawaii (Herrerro-Bervera). PI's Channell and Opdyke utilize their rapid throughput u-channel SRM for analysis of long, high resolution paleomagnetic records in studies of magnetostratigraphy and secular variation of the geomagnetic field. A new AF demagnetizer will replace a no longer supported Schonstedt AF demagnetizer and a 60 sample capacity thermal demagnetizer will be used for paleointensity analyses via the Thellier-Thellier method in large collaborative project to characterize secular variation of the geomagnetic field from the Pliocene to present. This project entails a large field sampling program along a north-south transect from the Arctic to Antarctica along the Americas. ***