Hydrous Phases in Subduction Zone Settings: Effects on Sediment Physical Properties and Microfabric

俯冲带环境中的水相：对沉积物物理性质和微纤维的影响

• 批准号: 9012145
• 负责人: Jane Schoonmaker
• 金额: $ 12.05万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9012145&HistoricalAwards=false
• 关键词: Hydrous; Phases; Subduction; Zone; Settings

The companion processes of dewatering and compaction that occur during sediment burial are strongly influenced by sediment composition and micro-fabric (i.e., grain-to-grain interactions). Improved documentation of these two processes is needed to gain better understanding of fluid flow, accretion, underplating and faulting in subduction zone settings. Drs. Tribble and Wilkens will extend earlier work from the Barbados accretionary prism to include studies of DSDP/ODP cores from Nankai Trough. X-ray diffraction will be used to determine the mineralogy of samples at several locations to develop a uniformly archived data set. Special emphasis will be placed on determining the abundances and diagenetic alteration of smectite and biogenic silica. Progressive alteration of volcanic ash to smectite will be traced. Microfabric studies will be conducted with both scanning and transmission electron microscopy, with the intention of quantifying changes in fabric with depth, composition and tectonic setting.

脱水和压实的伴随过程 在沉积物埋藏过程中， 组合物和微织物（即，颗粒与颗粒的相互作用）。 需要改进这两个过程的记录， 更好地理解流体流动、加积、底侵和 俯冲带背景下的断层作用 特里布尔和威尔肯斯医生 将把早期的工作从巴巴多斯增生棱镜扩展到 包括南海海槽DSDP/ODP岩心研究。 x射线 衍射将用于确定样品的矿物学 在几个地点建立一个统一的存档数据集。 将特别强调确定丰度， 蒙脱石和生物硅的成岩蚀变。 火山灰逐渐变成蒙皂石， 追踪 微织物研究将进行扫描， 和透射电子显微镜，目的是 量化织物的变化与深度，成分和 构造背景