SGER: IODP Site Survey Participation YK-0905, Tectonic and Petrologic Evolution of Godzilla Mullion

SGER：IODP 现场调查参与 YK-0905，哥斯拉竖框的构造和岩石演化

• 批准号: 0914440
• 负责人: Henry Dick
• 金额: $ 1.31万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2010-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0914440&HistoricalAwards=false
• 关键词: SGER; IODP; Site; Survey; Participation

Low angle detachment faulting can initiate crustal accretion at slowly spreading magma-starved ridges, producing structures known as Ocean Core Complexes (OCC). The OCC in the Parece Vela Rift (PVR) is one of the largest known and formed in a magma-starved backarc basin. These unique features at PVR provide relatively easy access to the lower crust and upper mantle of the oceanic backarc. The primary objective of this study will be obtaining preliminary data on the nature of the footwall block beneath the detachment surface. The research will advance the understanding of core-complex style ocean crustal formation, offering comparisons with that observed in the Atlantic and Indian Oceans. This type of crustal formation is poorly understood and can not be easily predicted using existing ophiolite models of ocean crust genesis. Consequently, investigations of OCC can be best achieved through direct ocean floor observation as planned for this cruise. Broader impacts:This project provides a strong international collaboration between US and Japanese scientists and thus promotes the cross scientific exchange within the greater IODP community. It may serve as an important site survey for IODP proposal 640-Full that is currently under consideration. It involves 2 US scientists and 2 students from two universities. The project will assist the research of two graduate students, and provide them a hands-on opportunity for sample collection and direct exchange with an international team of scientists. It also provides modest summer support for one of the students.

低角度脱离断层可以在缓慢散布的岩浆饥饿的山脊上引发地壳积聚，从而产生称为海洋核心复合物的结构（OCC）。 Parce Vela Rift（PVR）中的OCC是最大的已知，并在岩浆饥饿的后弧盆地中形成。 PVR上的这些独特功能可相对容易进入海洋后退的下地壳和上层地幔。这项研究的主要目的是获得有关距离表面下脚壁块的性质的初步数据。这项研究将促进对核心复合风格的海角形成的理解，从而与在大西洋和印度洋观察到的比较进行比较。这种类型的地壳形成知之甚少，使用现有的海壳创世纪的蛇绿岩模型很容易预测。因此，可以通过计划进行此巡游的直接海底观察来对OCC进行调查。更广泛的影响：该项目提供了美国和日本科学家之间强大的国际合作，从而促进了更大的IODP社区内的跨科学交流。它可以作为目前正在考虑的IODP提案640-FULL的重要场地调查。它涉及两名来自两所大学的美国科学家和2名学生。该项目将协助两名研究生的研究，并为他们提供动手收集的动手机会，并与国际科学家团队进行直接交流。 它还为其中一名学生提供了适度的夏季支持。