Palynomorphs in the Northern High Latitude Cold Water Domain: A neogene stratigraphic and paleoenvironmental transect across the fram strait

尽管在大洋钻探第151和162航次和IODP探险302航次期间成功钻探了新近纪沉积物，但北半球高纬度大西洋地区冷水区的新近纪古环境演化实际上是未知的。从季节性冰覆盖的北欧海到常年冰覆盖的北冰洋的一条样带，由907、909和M2a三个站点组成，将被用来解开约16-3 Ma期间的古环境历史。将建立新近纪孢粉生物地层学(甲藻、甲藻和其他有机壁藻)，并对照磁性地层学进行校准，以便为现有钻孔和未来在冰盖地区的钻探活动提供参考地层学。定量的孢粉形态数据和其他已公布的数据将被纳入重建海面状况(温度、盐度、海冰覆盖率)、冰川历史以及自中新世以来高纬度海洋对主要北极门户--弗拉姆海峡全球气候变冷的反应。

Despite sucessfully drilling Neogene sediments during ODP Legs 151 and 162 and IODP Expedition 302, the Neogene paleoenvironmental evolution in the coldwater domain of the Atlantic sector of the high northern latitudes is virtually unknown. A transect from the seasonally-ice covered Nordic Seas to the perennial ice-covered Arctic Ocean, consisting of the Sites 907, 909, and M2A, will be used to unravel the paleoenvironmental history for the period between ~16 and 3 Ma years. A Neogene palynomorph biostratigraphy (dinoflagellate cysts, acritarchs and other organic-walled algae) will be established and calibrated versus magnetostratigraphy to provide a reference stratigraphy for existing holes and for future drilling activities in the ice-covered regions. Quantitative palynomorph data and other published data will be incorporated in a reconstruction of sea-surface conditions (temperature, salinity, sea-ice cover), of the glaciation history, and of the response of high latitude oceans to global climate cooling across the major Arctic Gateway, the Fram Strait, since the Middle Miocene.