Production and Ascent of Magma at Convergent Margins: Information From Small Eruptive Centers in the Central Southern Volcanic Zone, Chile

汇聚边缘岩浆的产生和上升:来自智利中南部火山带小型喷发中心的信息

基本信息

  • 批准号:
    9725366
  • 负责人:
  • 金额:
    $ 9.1万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    1997
  • 资助国家:
    美国
  • 起止时间:
    1997-12-15 至 2000-11-30
  • 项目状态:
    已结题

项目摘要

9725366 Hickey-Vargas The proposed research is a geochemical study of basaltic volcanic rocks from small eruptive centers in the central Southern Volcanic Zone (CSVZ), Chile. Together with basalts from composite stratovolcanoes in the CSVZ, the fault-aligned small centers define a spatial and geochemical pattern suggesting that they were formed by melting with widely, but systematically varying amounts of hydrous subduction-related fluids. The objective of the research is to test competing hypotheses for melting and ascent of magma from above the subduction plate. Geochemical and isotopic data will be used to determine the relationship between the amount of hydrous fluid component and extent of melting. 10Be and 238U/230Th activity ratios will be determined for selected samples and compared with existing data from the composite stratovolcanoes, to determine whether basalts from the small centers include smaller amounts of recently extracted lithosphere. Petrography and electron microprobe analyses of phenocryst minerals will be used to infer liquid compositions. The results of this research will advance knowledge by contributing to our understanding of convergent margin magmatism, specifically, by identifying some of the controls on the siting of large and small volcanic centers, defining sources of subduction zone magma, and the pathways for cycling some elements between mantle and crust. Further, the research will advance education through the training of one Ph. D. student, and promote collaboration between U.S. and Chilean scientists.
9725366 Hickey-Vargas拟议的研究是对智利南部火山带(CSVZ)中部小型喷发中心的玄武质火山岩进行地球化学研究。 与玄武岩复合成层火山在CSVZ,断层对齐的小中心定义了一个空间和地球化学模式,这表明他们形成了广泛的熔融,但系统地变化量的含水俯冲相关的流体。 这项研究的目的是检验关于岩浆从俯冲板块上方熔融和上升的相互竞争的假设。地球化学和同位素数据将用于确定含水流体成分的数量与熔融程度之间的关系。 10 Be和238 U/230 Th的活性比将被确定为选定的样品,并与现有的数据进行比较,从复合成层火山,以确定是否玄武岩从小中心包括较少量的最近提取的岩石圈。斑晶矿物的岩相学和电子探针分析将用于推断液体成分。 这项研究的结果将通过有助于我们理解会聚边缘岩浆活动,特别是通过确定一些大小火山中心选址的控制因素,确定俯冲带岩浆的来源以及地幔和地壳之间循环某些元素的途径来推进知识。 此外,这项研究将通过培养一名博士生来促进教育。学生,并促进美国和智利科学家之间的合作。

项目成果

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Rosemary Hickey-Vargas其他文献

Sedimentary and volcanic record of the nascent Izu-Bonin-Mariana arc from IODP Site U1438
  • DOI:
    10.1130/B35612.1
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
  • 作者:
    Ryan J. Waldman;Kathleen M. Marsaglia;Rosemary Hickey-Vargas;Osamu Ishizuka;Kyle E. Johnson;Anders McCarthy;Gene Yogodzinski;Eshita Samajpati;He Li;Kate Laxton;Ivan P. Savov;Sebastien Meffre;Richard J. Arculus;Alexandre N. Bandini;Andrew P. Barth;Kara Bog
  • 通讯作者:
    Kara Bog
Sedimentary and volcanic record of the nascent Izu-Bonin-Mariana arc from IODP Site U1438
IODP 站点 U1438 新生伊豆-小博宁-马里亚纳岛弧的沉积和火山记录
  • DOI:
    10.1130/gsab.s.12977651.v1
  • 发表时间:
    2020-09
  • 期刊:
  • 影响因子:
    4.9
  • 作者:
    Ryan J. Waldman;Kathleen M. Marsaglia;Rosemary Hickey-Vargas;Osamu Ishizuka;Kyle E. Johnson;Anders McCarthy;Gene Yogodzinski;Eshita Samajpati;He Li;Kate Laxton;Ivan P. Savov;Sebastien Meffre;Richard J. Arculus;Alex;re N. B;ini;Andrew P. Barth;Kara Bog
  • 通讯作者:
    Kara Bog
Element and Sediment Accumulation Rates in the Florida Everglades
  • DOI:
    10.1023/a:1005290900575
  • 发表时间:
    2000-01-01
  • 期刊:
  • 影响因子:
    3.000
  • 作者:
    Robert S. Merkel;Rosemary Hickey-Vargas
  • 通讯作者:
    Rosemary Hickey-Vargas
A refractory HIMU component in the sources of island-arc magma
岛弧岩浆源区中的难熔 HIMU 组分
  • DOI:
    10.1038/360057a0
  • 发表时间:
    1992-11-05
  • 期刊:
  • 影响因子:
    48.500
  • 作者:
    Rosemary Hickey-Vargas
  • 通讯作者:
    Rosemary Hickey-Vargas

Rosemary Hickey-Vargas的其他文献

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{{ truncateString('Rosemary Hickey-Vargas', 18)}}的其他基金

MRI: Acquisition of a Scanning Electron Microscope for Geoscience, Forensic Chemistry and Science Education Research at Florida International University
MRI:佛罗里达国际大学购买扫描电子显微镜用于地球科学、法医化学和科学教育研究
  • 批准号:
    1726727
  • 财政年份:
    2017
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
Collaborative Research: Geochemistry of IODP Site 1438 and West Philippine Basin Volcanic Rocks: Constraints on Subduction Initiation and the Early Development of the Izu-Bonin-Mar
合作研究:IODP 1438号站点和西菲律宾盆地火山岩的地球化学:俯冲起始和伊豆博宁马早期发育的制约因素
  • 批准号:
    1537861
  • 财政年份:
    2015
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
Collaborative: Expanding the Use of Online Remote Electron Microscopy in the Classroom to Transform Undergraduate Geoscience Education
协作:扩大在线远程电子显微镜在课堂上的使用,以改变本科地球科学教育
  • 批准号:
    1323242
  • 财政年份:
    2013
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
Acquisition of an Inductively Coupled Plasma Optical Emission Spectrometer for the Department of Earth & Environment at Florida International University
为地球部购置一台电感耦合等离子体发射光谱仪
  • 批准号:
    1053190
  • 财政年份:
    2011
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
Evolution of the Philippine Sea Plate: Geochemical and Geochronological Studies of Pre-Oligocene Igneous Rocks
菲律宾海板块的演化:前渐新世火成岩的地球化学和年代学研究
  • 批准号:
    0928144
  • 财政年份:
    2009
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
Generation of Basaltic and Andesitic Magma in the Central Southern Volcanic Zone, Chile
智利中南部火山带玄武岩和安山岩岩浆的生成
  • 批准号:
    0337483
  • 财政年份:
    2004
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
GeoSCOPE - Exploring Geoscience Career Opportunities
GeoSCOPE - 探索地球科学职业机会
  • 批准号:
    0303173
  • 财政年份:
    2003
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Continuing grant
Collaborative Research: Magma Generation in the Early Mariana Arc System Revisited
合作研究:重新审视早期马里亚纳岛弧系统中的岩浆生成
  • 批准号:
    0001826
  • 财政年份:
    2001
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
POWRE: Ridge Meets Margin: Geochemical Effects of Subduction on the Central West Philippine Basin Spreading Center
POWRE:山脊与边缘:俯冲对中西菲律宾盆地扩张中心的地球化学影响
  • 批准号:
    0074868
  • 财政年份:
    2000
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Standard Grant
RUI: Tectonic Evolution of the West Philippine Basin: Evidence from Geochemical Studies
RUI:西菲律宾盆地的构造演化:来自地球化学研究的证据
  • 批准号:
    9314400
  • 财政年份:
    1994
  • 资助金额:
    $ 9.1万
  • 项目类别:
    Continuing grant

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职业:喷发前几天:用长石水晶体钟追踪岩浆上升路径
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