Collaborative Proposal: Spatial and temporal scales of crustal accretion in slow spreading crust - IODP Site U1309

合作提案:缓慢扩张地壳中地壳增生的时空尺度 - IODP Site U1309

基本信息

项目摘要

This award will support an integrated magnetic and thermochronometric study of gabbroic rocks from Hole U1309D (Atlantis Masif, on the western flank of the Mid-Atlantic Ridge at 30degreesN. The distribution (relative to igneous contacts) and temperature stability of the normal polarity magnetic overprints will give valuable constraints on the spatial scales of intrusions as well as the temperature of the country rock when these plutons were emplaced. Single zircon U-Pb dating will define the emplacement age of crust forming melts (including leucocratic dikes, oxide gabbro and some gabbro) found throughout the upper 1250m of IODP Hole U1309D. (U-Th)/He thermochronometry on zircon and apatite, with closure temperatures between ~200- 70degreesC, will delimit the low temperature cooling and denudation history of these rocks. The combined U/Pb chronometry and remanent magnetic data will be used to constrain the timing and rate of cooling/denudation resulting from low-angle normal faulting as proposed for Atlantis Massif. Remanence directions (particularly from core pieces reoriented using formation microscanner images) will be used to estimate the amount of tectonic rotation since the remanence was acquired and where may help constrain the range of possible rotation axes. The study involves international collaboration and the participation of graduate students.
该奖项将支持对孔U1309 D(Atlantis Masif,位于北纬30度大西洋中脊西侧)的辉长岩进行综合磁性和热年代学研究。正极性磁叠印的分布(相对于火成岩接触面)和温度稳定性将对侵入体的空间尺度以及这些侵入体侵位时围岩的温度提供有价值的约束。单颗粒锆石U-Pb测年将确定在IODP孔U1309 D上部1250米发现的地壳形成熔体(包括浅色岩脉、氧化物辉长岩和一些辉长岩)的侵位年龄。锆石和磷灰石的(U-Th)/He热年代学(闭合温度在~200- 70 ℃之间)将确定这些岩石的低温冷却和剥蚀历史。结合U/Pb测时和Repersonal磁数据将被用来约束的时间和速率的冷却/剥蚀所造成的低角度正常断层建议为亚特兰蒂斯地块。剩磁方向(特别是使用地层微扫描仪图像重新定向的岩心块)将用于估计自获得剩磁以来的构造旋转量,这可能有助于限制可能的旋转轴范围。这项研究涉及国际合作和研究生的参与。

项目成果

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Jeffrey Gee其他文献

Learning to be Relevant: Evolution of a Course Recommendation System
学习相关性:课程推荐系统的演变

Jeffrey Gee的其他文献

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{{ truncateString('Jeffrey Gee', 18)}}的其他基金

Collaborative Research: A geomagnetic intensity time series from the Proterozoic Laramie anorthosite
合作研究:元古代拉勒米斜长岩的地磁强度时间序列
  • 批准号:
    1722604
  • 财政年份:
    2017
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Continuing Grant
Collaborative Research: Tracking the thermal and petrologic evolution of magmatically robust fast spread lower ocean crust
合作研究:追踪岩浆强劲、快速扩张的下洋地壳的热学和岩石学演化
  • 批准号:
    1459387
  • 财政年份:
    2015
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: High Precision 40Ar/39Ar Geochronology and Paleomagnetism to Determine the History and Consequences of Louisville Mantle Plume Motion
合作研究:高精度 40Ar/39Ar 地质年代学和古地磁学以确定路易斯维尔地幔柱运动的历史和后果
  • 批准号:
    1154675
  • 财政年份:
    2012
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: An Evaluation of Ash Flow Tuffs as Geomagnetic Paleointensity Recorders
合作研究:灰流凝灰岩作为地磁古强度记录器的评估
  • 批准号:
    0943999
  • 财政年份:
    2010
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
RAPID: A Nonmagnetic Sinker Bar for Magnetic Logging on IODP Expedition 330
RAPID:用于 IODP Expedition 330 磁测井的非磁性沉降片
  • 批准号:
    1106464
  • 财政年份:
    2010
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Mapping magnetic anomalies in the Cretaceous "Quiet" Zone using a new airborne autonomous vehicle
合作研究:使用新型机载自动飞行器绘制白垩纪“安静”区域的磁异常图
  • 批准号:
    0452610
  • 财政年份:
    2006
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: An Integrated Geomagnetic and Petrologic Study of the Dufek Complex
合作研究:杜菲克杂岩体的综合地磁和岩石学研究
  • 批准号:
    0537609
  • 财政年份:
    2006
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Origin of Magnetite and Magnetic Remanence in Submarine Basaltic Glass and Implications for Glass Paleointensities
合作研究:海底玄武岩玻璃中磁铁矿和剩磁的起源以及对玻璃古强度的影响
  • 批准号:
    0537981
  • 财政年份:
    2005
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
SGER - Ash Flow Tuffs: a New Material for Reliable Paleointensities
SGER - 灰流凝灰岩:一种可靠古强度的新材料
  • 批准号:
    0521374
  • 财政年份:
    2005
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant
Collaborative Research: Structure and Composition of Fast-Spread EPR (East Pacific Rise) Oceanic Crust Exposed at Pito Deep
合作研究:皮托深海暴露的快速扩散的 EPR(东太平洋海隆)洋壳的结构和成分
  • 批准号:
    0221948
  • 财政年份:
    2004
  • 资助金额:
    $ 7.05万
  • 项目类别:
    Standard Grant

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合作提案:重新定义森林生态系统多个时空尺度扰动的生态记忆
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