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

尽管在ODP第151和162次远征和IODP第302次远征期间成功地钻探了新近纪沉积物，但北纬高纬度大西洋部分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样带，包括907、909和M2A，将被用来揭示约16至3 Ma期间的古环境历史。将建立一个新近纪的藻形生物地层学（鞭毛藻囊、棘藻和其他有机壁藻类），并与磁地层学进行校准，为现有的孔和未来在冰雪覆盖地区的钻探活动提供参考地层学。定量的地貌数据和其他已发表的数据将被纳入重建海洋表面条件（温度、盐度、海冰覆盖）、冰川历史和高纬度海洋对中中新世以来横跨北极主要门户弗拉姆海峡的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.