Collaborative Research: Initial Palynological Characterization of Cape Roberts Drill Cores

合作研究：罗伯茨角钻芯的初步孢粉学特征

• 批准号: 9527013
• 负责人: Rosemary Askin
• 金额: $ 6.59万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9527013&HistoricalAwards=false
• 关键词: Collaborative; Research; Initial; Palynological; Characterization

Wrenn OPP 9527075 Askin OPP 9527013 Abstract The Cape Roberts Project (CRP) is designed to core submarine deposits in the western Ross Sea that range in age from middle Late Cretaceous-early Miocene. Four, 500m long drillcores will be taken from a platform of annual sea ice floating in water depths ranging from 100 to 500m. The cores will sample a composite stratigraphic section 1500m thick during two, 45-day-long drilling seasons (October-November 1996 and 1997). Shipboard geophysical surveys have identified a package of dipping sedimentary strata interpreted to be Cretaceous-Miocene in age. A thin blanket of younger sediments overlies these beds. Rocks of this age range are not known from the Ross Sea, the Transantarctic Mountains or elsewhere in East Antarctica. Thus, recovered sediments of this age have prime importance for interpreting Antarctic geologic, biologic, climatic and tectonic history during the Cretaceous-Cenozoic. Objectives of CRP include obtaining a late Cretaceous-Cenozoic paleoclimatic record, studying glacial-deglacial and eustasy cycles, and determining the Gondwana breakup and rifting history of the Ross Sea embayment. Core description and downhole experiments will be conducted at each drill site. An international team of biostratigraphers, sedimentologists, magnetostratigraphers, petrologists, etc. will conduct initial characterization of the cores and their constituents during and immediately following drilling at the fully equipped Crary Science and Engineering Center (CSEC), McMurdo Station, Ross Island, Antarctica. Palynomorphs have proven to be invaluable tools for biostratigraphic and paleoenvironmental interpretation of younger Ross Sea sequences drilled in the Ross Sea Embayment. They include both marine (dinocysts) and nonmarine (spores, pollen) types, record extensive and diverse geologic information, and are preserved in a wide variety of lithofacies formed in various paleoenvironments. This award suppor ts initial palynological characterization of the CRP drillcores, in collaboration with New Zealand palynologists. All samples will be processed in the CSEC using a focused mircowave digestion unit for maximum safety and effieciency. Analyses will focus on providing palynological input for an integrated biostratigraphic and paleoenvironmental framework based on all microfossils groups present. This critical framework is of fundamental importance to all future geologic, geophysical and paleontologic studies conducted on the cores and in the drilling area. Palynology will also provide vital data for prime CRP objectives: climate change, eustasy, and thermal and tectonic history. Future palynologic studies of the cores include such topics as paleoenvironments, vegetational and climatic change, taxonomy, evolution of southern marine and terrestrial floras, endemism, dispersal and paleobiogeography, and extinction events.

WRENN OPP 9527075 ASKIN OPP 9527013摘要Roberts Cape Roberts Project（CRP）旨在在西罗斯海的核心海底沉积物中，其年龄范围从中后期白垩纪 - 美洲中新世。四，500m长的钻头将从一年一度的海冰平台中取出，范围为100到500m。 这些核心将在两个，45天的钻探季节（1996年10月至1996年和1997年）进行复合地层厚1500m厚的厚度。 船上的地球物理调查已经确定了一套浸入沉积地层，这些地层被解释为白垩纪是中新世的。 薄薄的年轻沉积物覆盖了这些床。 这个年龄范围的岩石是罗斯海，跨北极山脉或南极洲东部其他地方的岩石。 因此，在白垩纪 - 元生中解释南极地质，生物学，气候和构造历史的回收沉积物对于解释南极地质，生物学，气候和构造历史至关重要。 CRP的目的包括获得晚白垩纪的古气候记录，研究冰川冰川和欣赏周期，并确定Ross Sea Embayment的冈瓦纳破裂和裂开历史。 核心描述和井下实验将在每个钻头进行。 一支由生物地层学家，沉积学家，磁层学家，岩石学家等组成的国际团队将对核心及其成分进行初步表征，并在装备齐全的Crary Science and Engineering Center（CSEC）钻探期间和立即进行，McMurdo Station，Antarctica，McMurdo Station。 事实证明，Palynomorphs是对罗斯海胚胎钻探的年轻罗斯海序列的生物地层和古环境解释的宝贵工具。 它们包括海洋（Dinocysts）和非海洋（孢子，花粉）类型，记录广泛而多样的地质信息，并保存在各种古环境中形成的各种岩相中。 该奖项支持CRP Drillcores的最初的孢子级特征，并与新西兰型杂种学家合作。 所有样品将使用集中的mircowave消化单元在CSEC中处理，以最大程度的安全性和效率。 分析将集中于为基于所有微化石组的综合生物地层学和古环境框架提供孢粉学输入。 这个关键框架对于对核心和钻探区域进行的所有未来地质，地球物理和古生物学研究至关重要。 孢粉学还将为主要CRP目标提供重要数据：气候变化，eustasy以及热和构造历史。 对核心的未来元研究研究包括古环境，植被和气候变化，分类法，南部海洋和陆地植物群的进化，典写，分散和古生物地理以及灭绝事件。