Paleoclimate from Upper Paleozoic Loessite of the Ancestral Rocky Mountains

小行星9613943 晚古生代气候的历史是古气候学家和地质学家都非常感兴趣的。 这种兴趣部分来自于对盘古大陆独特地理和相应独特气候的好奇心。 另一部分来自于更实用的兴趣：盘古大陆的上古生界地层蕴藏着重要的资源。 近年来的研究认为，冰川作用是上古生界地层的一级控制因素，但旋回内的气候变化可能伴随着晚古生代冰川作用。 目前，这种高频率气候变化的证据和特征受到的限制很小。 本研究的目的是测试的可行性，获得高分辨率的古气候数据，从上古生界黄土-古土壤序列使用综合古地磁沉积学的方法。 近年来对新生代黄土-古土壤序列的研究表明，磁化率的变化与古气候变化有关。 为了研究这种古地磁方法在古生代的应用，将通过位于盘古大陆西部（古老的落基山脉）的上古生界黄土-古土壤序列测量磁化率。 磁化率模式将与沉积学观测相结合，以确定古气候波动。 将进行古地磁和岩石磁性分析，以（1）表征磁化和（2）评估可能的再磁化。 如果成功的话，这种方法将提供低纬度西盘古大陆的古气候数据，可用于解决基础和应用研究问题。

9613943 Soreghan The history of late Paleozoic climate is of great interest to both (paleo) climatologists and geologists. Part of this interest derives from curiosity in Pangea's unique geography and correspondingly unique climate. Another part derives from a more applied interest: Upper Paleozoic strata of Pangea house significant resources. Most recent studies cite glacioeustasy as the first-order control on upper Paleozoic strata, but intracyclic climate change likely accompanied late Paleozoic glacioeustasy. Currently, the evidence for and character of this high-frequency climate change is poorly constrained. The objective of this research is to test the feasibility of obtaining high-resolution paleoclimatic data from upper Paleozoic loessite-paleosol sequences using an integrated paleomagnetic-sedimentologic approach. Recent research on Cenozoic loess-paleosol sequences indicates that variations in magnetic susceptibility correlate with changes in paleoclimate. To investigate the application of this paleomagnetic approach to the Paleozoic, magnetic susceptibility will be measured through an upper Paleozoic loessite-paleosol sequence located in western Pangea (Ancestral Rocky Mountains). Patterns in magnetic susceptibility will be integrated with sedimentologic observations to identify paleoclimatic fluctuations. Paleomagnetic and rock magnetic analyses will be performed to (1) characterize the magnetization and (2) assess possible remagnetization. If successful, this approach will provide data on the paleoclimate of low-latitude western Pangea that can be used to address fundamental and applied research questions.