Diatoms in Sirius Formation and related Sediments: Significance to Paleoclimate and Glacial Geology

天狼星地层和相关沉积物中的硅藻：对古气候和冰川地质学的意义

• 批准号: 8816613
• 负责人: Lloyd Burckle
• 金额: $ 11.94万
• 依托单位: Columbia University Lamont Doherty Earth Observatory
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-03-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816613&HistoricalAwards=false
• 关键词: Diatoms; Sirius; Formation; related; Sediments

This research will study (identify and enumerate) diatoms in the Sirius Formation and age- equivalent and related sediments collected on various parts of Antarctica with the following objectives in mind: 1. A relatively high resolution stratigraphy will place age constraints upon each sample. These data will allow such topics as the timing of late Neogene deglaciation and reglaciation of Antarctica, glacial overriding events and the deposition of non- ice related sediments. 2. The diatoms found in the tills and other Neogene sediment from the Antarctic continent impose some constraints on our paleoenvironmental interpretation of this region and the surrounding Southern Ocean. Because many of the species found in these sediments are extant, diatoms can be used to characterize the paleotemperature and paleoclimate regime around the continent, particularly for the middle to late Pliocene. Since this time interval covers the prelude to, and inception of, northern hemisphere glaciation, these data will draw Antarctica into the discussion of events leading up to the Quaternary climatic deterioration.

这项研究将研究（鉴定和列举）天狼星组的硅藻及其在南极洲不同地区收集的年龄相当和相关的沉积物，目的如下： 1. 相对高分辨率的地层学将对每个样本进行年龄限制。这些数据将有助于研究诸如晚新近纪南极洲冰川消融和冰川消融的时间、冰川覆盖事件和非冰相关沉积物的沉积等问题。2. 在南极大陆的浅滩和其他新近纪沉积物中发现的硅藻对我们对该地区和周围南大洋的古环境解释有一定的限制。由于在这些沉积物中发现的许多物种都是现存的，因此硅藻可以用来表征大陆周围的古温度和古气候制度，特别是上新世中晚期。由于这段时间间隔涵盖了北半球冰川作用的前奏和开始，这些数据将把南极洲纳入导致第四纪气候恶化的事件的讨论中。