Paleomagnetic and Mineral Magnetic Studies of Lake Sediments, Venezuelan Andes

PI计划调查古地磁和矿物 1999年以来， 委内瑞拉的安第斯山脉。 这项研究是为了进一步 确定该地区的古气候变化。 湖泊， 在海拔1 000米至3 500米的地区， 同事们从U。他们制造了一种基于地球化学的 过去一万八千年的古气候记录 长期变化 将使用倾斜度和 磁场的相对衰减测量。 的 磁性特征的载体以及它们的颗粒大小 将对来自先前存在的湖泊的子样本进行详细调查 丹 磁测数据结合详细的地球化学数据 和孢粉学数据，将提供一个 古气候学研究中的相关技术，提供 以前的解释的佐证，并提出新的 古气候和古环境的信息 北方安第斯山脉。

The PI plans to investigate the paleomagnetic and mineral magnetic character of sediments from a series of lakes in the Venezuelan Andes. This research is being undertaken to further define paleoclimatic variation in the region. The lakes, ranging in altitude from 1000 to 3,500 m, have been sampled and studied by colleagues from U. Mass who have produced a geochemical based paleoclimatic record for the past 18,000 years. Secular variation of the lake sediments will be studied using inclination and relative declination measurements of the magnetic field. The carriers of the magnetic signature, as well as their grain size will be investigated in detail on subsamples from preexisting lake cores. The magnetic data, in conjunction with detailed geochemical and palynological data on the same cores, will provide a correlation of techniques in paleoclimatology studies, provide for corroboration of previous interpretations, and present new information on the paleoclimitalogy and paleoenvironment of the northern Andes.