课题基金 / 基金详情

Collaborative Research: Geochemical Investigation of the Tortugal Komatiites of Costa Rica

Collaborative Research: Geochemical Investigation of the Tortugal Komatiites of Costa Rica
合作研究:哥斯达黎加托图加尔科马提岩的地球化学调查
批准号:
9902855
负责人:
Douglas Pyle
金额:
$6.19万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-03-01 至 2001-02-28

项目摘要

项目成果

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中文摘要
翻译
pylehigh MgO熔岩(komatiites和苦荞岩)是中白垩世加勒比海高原大火成岩省(LIP)中罕见但重要的组成部分。这些熔岩类型对于了解导致其产生的地幔温度和动力学至关重要,但在其他海洋LIP省份却无法获得。该项目是对哥斯达黎加最近发现的Tortugal超基性/基性熔岩进行综合实地、岩石学和地球化学研究。利用主元素、微量元素、铂族元素和Sr-Nd-Pb-Os同位素分析,结合40Ar-39Ar测年,对该地区Tortugal熔岩进行特征分析,以进一步记录该地区与LIP形成相关的岩石成因时空变化。Tortugal套在时间上与东南方向1000 km处的goorgona岛的科马长岩、苦橄岩和玄武岩有关,但初步资料显示两个地区在地幔源和热状态上存在显著差异。了解高MgO熔岩的空间变动性将有助于区分加勒比高原形成的快速减压融化或羽头模式。
英文摘要
9902855PyleHigh MgO lavas (komatiites and picrites) are a rare but important component of the mid-Cretaceous Caribbean plateau large igneous province (LIP). These lava types are critical to understanding mantle temperature and dynamics that lead to their production but are inaccessible in other oceanic LIP provinces. This project is an integrated field, petrological and geochemical study of the recently discovered Tortugal ultramafic/mafic lavas of Costa Rica. Major element, trace element, platinum group element and Sr-Nd-Pb-Os isotope analyses, combined with 40Ar-39Ar dating, will be used to characterize the Tortugal lavas in order to further document the spatial and temporal variability in petrogenesis related to LIP formation in the region. The Tortugal suite is temporally related to the Gorgona Island komatiites, picrites and basalts 1000 km to the southeast, however preliminary data show significant differences in mantle source and thermal regime between the two areas. Understanding the spatial variability in high MgO lavas will help distinguish between rapid decompression melting or plume head models for the creation of the Caribbean plateau.
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会议论文
SGER: Re-1870s/1860s and Platinum Group Element Characteristics of Oceanic Crust and Mantle: Improving Detection Limits by ICP-MS-ID
Geochemical Investigation of Paleocene-Eocene Seafloor Volcanism in the Oregon Coast Range: Products of the Yellowstone Hot Spot?
Migration of the Pacific-Indian Isotopic Boundary and Evolution of the Australian-Antarctic Discordance: A Drilling Site Survey
Geochemical Investigation of Paleocene-Eocene Seafloor Volcanism in the Oregon Coast Range: Products of the Yellowstone Hot Spot?
国内基金
海外基金
Research on Quantum Field Theory without a Lagrangian Description
  • 批准号:
    24ZR1403900
  • 项目类别:
    省市级项目
  • 资助金额:
    --
  • 批准年份:
    2024
  • 负责人:
    SATOSHI NAWATA
  • 依托单位:
Cell Research
Cell Research
Cell Research (细胞研究)