Collaborative Research: Mining SCICEX Geophysical Data in the Arctic Ocean to Constrain the Structure and Geologic Development of the Amerasian Basin

合作研究：挖掘北冰洋 SCICEX 地球物理数据以约束亚美亚盆地的结构和地质发育

• 批准号: 0241004
• 负责人: Bernard Coakley
• 金额: $ 7.75万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241004&HistoricalAwards=false
• 关键词: Collaborative; Research; Mining; SCICEX; Geophysical

AbstractOPP-0240964CochranOPP-0241004CoakleyOPP-0241188EdwardsThis is a collaborative proposal by Principal Investigators at Lamont Doherty Earth Observatory and the Universities of Hawaii and Alaska. Between 1995 and 1999, the U.S. Navy carried out five nuclear submarine cruises to the Arctic Ocean for civilian scientific research through the SCICEX (SCience ICe EXercise) program. The Seafloor Characterization and Mapping Pods' (SCAMP)instrument package, an integrated geophysical survey system providing gravity, swath bathymetry and sidescan, and chirp sub-bottom profiler data was installed on the submarine for the 1998 and 1999 cruises. During those two cruises, SCAMP geophysical data were acquired over the major Arctic Ocean floor features. These data were used to determine the morphology, structure and tectonics of the Gakkel Ridge which occupies a singularly important position as the slowest spreading portion of the global mid-ocean ridge system, and to test the hypothesis of the existence of a Pleistocene Arctic ice sheet by imaging shallow portions of the Arctic Ocean for glaciogenic features. The purpose of this project is to allow continued mining of this unique and rich data set and to address important questions related to the origin, structure and development of the Amerasian Basin. The primary foci of the proposed work will be the Lomonosov Ridge, a sliver of continental crust extending across the Arctic Ocean separating the Mesozoic Amerasian Basin from the Tertiary Eurasian Basin, and the Chukchi Borderland, a high-standing area of extended continental crust jutting into the Canada Basin. Geophysical studies of the SCICEX data from the Amerasian Basin emphasizing those features allow investigation of a very simple, but unanswered and extremely fundamental question: How did the Amerasian Basin come into being? The origin and tectonic development of the basin has been very controversial. Published data from the basin is inconclusive and can be used to support radically different models. Principal Investigators will determine the structure and the type of rifting and distinguish among the different models. The Chukchi Borderland is a block of continental crust protruding into the Amerasian Basin. Different models for the development of the Amerasian Basin propose different modes of formation for the northern and eastern (Northwind Escarpment) margin of the Borderland. SCAMP data will provide the necessary data to determine the structure of the margin and the form of rifting and to allow further tests for the models for the origin of the basin.

AbstractOpp-0240964Cochranopp-0241004CoakleyOpp-0241188 Edwardshiss这是Lamont Doherty Earth天文台和夏威夷大学和阿拉斯加大学的首席研究人员的合作提议。 在1995年至1999年之间，美国海军通过SCICEX（Science Ice Exporce）计划进行了五艘核潜艇前往北极海洋进行平民科学研究。 海底表征和映射PODS（SCAMP）仪器包装是一种提供重力，测深和侧can的集成地球物理调查系统，以及1998年和1999年巡航的潜艇上安装了Chirp subpottom profiler数据。 在这两次巡游中，在主要的北极海底特征上获得了SCAMP地球物理数据。 这些数据用于确定Gakkel Ridge的形态，结构和构造学，这是全球中洋山脊系统中最慢的散布部分，并通过成像北极海洋浅层的浅水层层次来检验，这是全球中境山脊系统中最慢的部分，并测试了北极北极冰期的假设。 该项目的目的是允许继续挖掘这个独特而丰富的数据集，并解决与阿美拉萨斯盆地的起源，结构和开发有关的重要问题。 拟议作品的主要焦点将是Lomonosov Ridge，这是一条大陆壳的片段，遍布北极海洋，将中生代的阿米拉裔盆地与三级欧亚大陆盆地分隔开，以及Chukchi-Borderland，Chukchi Borderland，这是一个高层大陆的高层大陆，大陆繁殖到加拿大盆地。 来自美洲盆地的SCICEX数据强调这些特征的SCICEX数据的地球物理研究允许研究一个非常简单但没有答复且极为基本的问题：阿美拉萨斯盆地是如何出现的？盆地的起源和构造发展非常有争议。 来自盆地的发布数据尚无定论，可用于支持根本不同的模型。 主要研究人员将确定裂谷的结构和类型和区分不同模型。 Chukchi Borderland是大陆地壳的块，突出了阿美拉萨斯盆地。 阿美拉萨斯盆地开发的不同模型提出了边境地区北部和东部（Northwind悬崖）边缘的不同形成模式。 SCAMP数据将提供必要的数据，以确定边缘的结构和裂谷形式，并允许对盆地原点的模型进行进一步的测试。