Cenozoic crustal genesis in SW Pacific arcs and backarcs

西南太平洋弧和弧后的新生代地壳成因

基本信息

  • 批准号:
    0751600
  • 负责人:
  • 金额:
    $ 34.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2008
  • 资助国家:
    美国
  • 起止时间:
    2008-02-15 至 2012-01-31
  • 项目状态:
    已结题

项目摘要

ABSTRACT 0751600 (Gill)Intellectual Merit: This research examines how the mantle and crust of the Earth evolve from during one ~50 million year cycle of subduction, from initiation to demise, in the absence of pre-existing continental crust. It involves four igneous petrological projects on rocks from the Kermadec-Fiji-Tonga area of the SW Pacific. Test using the geochemical and isotopic signatures of volcanic rocks will be used to answer (1) whether subduction initiation has a characteristic magmatic signature and cause; (2) if magma genesis in the mantle wedge during back-arc rifting evolves from flux-dominated to decompression-dominated melting; and (3) whether geochemical features of primary arc magmatism get passed on to second stage" crust that is continental in character. The geochemical plan includes generation and interpretation of extensive trace element and Nd-Hf-Sr-Pb isotope data. In addition, U/Pb and Ar-Ar ages will be obtained for igneous rocks, and results compared to analogues in the northern hemisphere. The first project focuses on the oldest rocks in Fiji and Tonga. The second focuses on basalts erupted in Fiji during 3-5 Ma, and those in cross-chains and rift basins in the Havre Trough. The third uses the granitic plutons of different ages and compositions in Fiji and includes (U-Th)/He double-dating". One anticipated impact will be to assess the commonality of processes between Earth's two largest and best-studied oceanic arcs: Izu-Marianas, and Kermadec-Fiji-Tonga.Broader Impacts: All three projects directly complement the NSF-funded island arc and backarc basin research foci in RIDGE2000, MARGINS, and IODP. They also involve international collaboration with scientists in Japan and New Zealand. The project provides education/training opportunities for two graduate students and several undergraduates. Public outreach and dissemination will occur through the MARGINS Education and Outreach program and a well-documented sample collection will be provided to the Smithsonian National Museum of Natural History Islands" collection where it will be curated indefinitely.
摘要/ ABSTRACT摘要:0751600 (Gill)学术价值:本研究考察了在没有大陆地壳存在的情况下,地球的地幔和地壳是如何在一个~ 5000万年的俯冲周期中从开始到消亡的。它涉及四个火成岩岩石学项目,这些岩石来自西南太平洋的克马德克-斐济-汤加地区。利用火山岩的地球化学和同位素特征进行测试,以回答(1)俯冲起始是否具有特征岩浆特征及其成因;(2)弧后裂陷时期地幔楔内岩浆成因是否由以通量为主向以减压为主的熔融演化;(3)原生弧岩浆活动的地球化学特征是否传递到具有大陆性质的第二阶段地壳。地球化学计划包括大量微量元素和Nd-Hf-Sr-Pb同位素数据的生成和解释。此外,还将获得火成岩的U/Pb和Ar-Ar年龄,并将结果与北半球的类似物进行比较。第一个项目的重点是斐济和汤加最古老的岩石。二是3 ~ 5 Ma期间斐济的玄武岩,以及Havre海槽的交叉链和裂谷盆地的玄武岩。第三种是利用斐济不同年龄和成分的花岗岩岩体,包括(U-Th)/He双重测年”。一个预期的影响将是评估地球上两个最大和研究得最好的海洋弧:伊豆-马里亚纳和克马德克-斐济-汤加之间过程的共性。更广泛的影响:这三个项目直接补充了美国国家科学基金会资助的RIDGE2000、边际和IODP的岛弧和弧后盆地研究重点。它们还涉及与日本和新西兰科学家的国际合作。该项目为两名研究生和几名本科生提供了教育/培训机会。公众外展和传播将通过边际教育和外展项目进行,并将向史密森尼国家自然历史博物馆提供一份记录完好的样本收藏,在那里它将被无限期地策展。

项目成果

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James Gill其他文献

Effects of cropping-system, irrigation method, and soil properties on soil nitrogen and organic matter dynamics in the Big Horn Basin
大角盆地种植制度、灌溉方法和土壤性质对土壤氮和有机质动态的影响
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    A. Mesbah;D. Peck;G. Franc;K. J. Reddy;U. Norton;S. Frost;James Gill
  • 通讯作者:
    James Gill
HCS Road
HCS路
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Donald Jackson;M. Lenard;Alexandr I. Zelensky;M. Shaikh;James V. Scharpf;Richard Shaginaw;Mahesh Nawade;M. Agler;Normand J. Cloutier;M. Fennell;Qi Guo;Judith Wardwell;Dandan Zhao;Yingjie Zhu;Christopher Miller;James Gill
  • 通讯作者:
    James Gill
Alcohol problems in employment: epidemiology and responses.
就业中的酒精问题:流行病学和应对措施。
  • DOI:
  • 发表时间:
    1994
  • 期刊:
  • 影响因子:
    2.8
  • 作者:
    James Gill
  • 通讯作者:
    James Gill
Establishing a High-Throughput and Automated Cancer Cell Proliferation Panel for Oncology Lead Optimization
建立高通量和自动化的癌细胞增殖小组以优化肿瘤学先导化合物
  • DOI:
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0
  • 作者:
    M. Lei;H. Ribeiro;Garrett Kolodin;James Gill;Yu;D. Maloney;Yi Fan;Sha Li;Larnie Myer;Michael Beluch;Litao Zhang;L. Schweizer
  • 通讯作者:
    L. Schweizer
Mantle flow in subduction systems and its effects on surface tectonics and magmatism
俯冲系统中的地幔流及其对地表构造和岩浆作用的影响
  • DOI:
    10.1038/s43017-024-00612-3
  • 发表时间:
    2024-12-03
  • 期刊:
  • 影响因子:
    71.500
  • 作者:
    Valentina Magni;Ágnes Király;Colton Lynner;Pilar Avila;James Gill
  • 通讯作者:
    James Gill

James Gill的其他文献

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{{ truncateString('James Gill', 18)}}的其他基金

State of the Arc Conference (SOTA) 2010: Subduction to Eruption
2010 年弧形会议 (SOTA):俯冲到喷发
  • 批准号:
    1012004
  • 财政年份:
    2010
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
PostDoctoral Research Fellowship
博士后研究奖学金
  • 批准号:
    1004721
  • 财政年份:
    2010
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Fellowship Award
Collaborative Research: Data synthesis for examination of magmatic, tectonic, and hydrothermal activity at the Endeavour Segment ISS
合作研究:用于检查奋进段国际空间站的岩浆、构造和热液活动的数据合成
  • 批准号:
    1043274
  • 财政年份:
    2010
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
MARGINS: Collaborative Research: Synthesis and Integration of Magmagenetic Controls for Subduction Factory Focus Sites
边缘:合作研究:俯冲工厂焦点地点岩浆成因控制的综合和整合
  • 批准号:
    0840981
  • 财政年份:
    2009
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Origin of Crust and the Temporal and Spatial Scales of Mantle Melting at the Endeavour Segment, Juan de Fuca Ridge
合作研究:胡安德富卡海岭奋进段的地壳起源和地幔融化的时空尺度
  • 批准号:
    0623161
  • 财政年份:
    2006
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Variations of sediment input to magma genesis across the Kurile arc
合作研究:千岛弧上岩浆生成的沉积物输入变化
  • 批准号:
    0424825
  • 财政年份:
    2004
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Mantle and Fluid Evolution Across the Izu Arc
合作研究:伊豆弧上的地幔和流体演化
  • 批准号:
    0325189
  • 财政年份:
    2003
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Continuing Grant
Collaborative Research: Investigating the Processes and Timescales of Andesite Differentiation: A Comprehensive Petrological and Geochemical Study of Arenal Volcano, Costa Rica
合作研究:调查安山岩分异的过程和时间尺度:哥斯达黎加阿雷纳尔火山的综合岩石学和地球化学研究
  • 批准号:
    0207185
  • 财政年份:
    2002
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
Melt Sources and Timescales in Western Pacific Island Arcs
西太平洋岛弧的融化源和时间尺度
  • 批准号:
    0106206
  • 财政年份:
    2001
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Standard Grant
Graduate Research Fellowship Program
研究生研究奖学金计划
  • 批准号:
    9818607
  • 财政年份:
    1998
  • 资助金额:
    $ 34.5万
  • 项目类别:
    Fellowship Award

相似海外基金

Interrogating the role of magmatism, tectonics, crustal growth and basin redox in controlling localization, genesis, tonnage, and grade of exhalative base and precious metal mineralization along evolving continental margins
探讨岩浆作用、构造、地壳生长和盆地氧化还原在控制沿演化大陆边缘的喷发基底和贵金属矿化的定位、成因、吨位和品位方面的作用
  • 批准号:
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探讨岩浆作用、构造、地壳生长和盆地氧化还原在控制沿演化大陆边缘的喷发基底和贵金属矿化的定位、成因、吨位和品位方面的作用
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    RGPIN-2017-04262
  • 财政年份:
    2021
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Interrogating the role of magmatism, tectonics, crustal growth and basin redox in controlling localization, genesis, tonnage, and grade of exhalative base and precious metal mineralization along evolving continental margins
探讨岩浆作用、构造、地壳生长和盆地氧化还原在控制沿演化大陆边缘的喷发基底和贵金属矿化的定位、成因、吨位和品位方面的作用
  • 批准号:
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    2020
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    Discovery Grants Program - Individual
Interrogating the role of magmatism, tectonics, crustal growth and basin redox in controlling localization, genesis, tonnage, and grade of exhalative base and precious metal mineralization along evolving continental margins
探讨岩浆作用、构造、地壳生长和盆地氧化还原在控制演化大陆边缘喷发基底和贵金属矿化的定位、成因、吨位和品位方面的作用
  • 批准号:
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  • 财政年份:
    2019
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    $ 34.5万
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    $ 34.5万
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    Discovery Grants Program - Individual
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探讨岩浆作用、构造、地壳生长和盆地氧化还原在控制演化大陆边缘喷发基底和贵金属矿化的定位、成因、吨位和品位方面的作用
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    $ 34.5万
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The role of mixing processes in andesite genesis - deep sediment recycling versus shallow crustal contamination
混合过程在安山岩成因中的作用 - 深层沉积物回收与浅层地壳污染
  • 批准号:
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    $ 34.5万
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    Discovery Grants Program - Individual
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