Pre-survey: Magmatic evolution of the Tiger gabbroic complex (Northern Victoria Land, Antarctica): insights into the lower crust of a Cambrian immature Island Arc

预调查:虎辉长岩杂岩体的岩浆演化(南极洲北维多利亚地):深入了解寒武纪未成熟岛弧的下地壳

基本信息

项目摘要

Subduction-zone related mafic/ultramafic complexes marking the suture between the Wilson Terrane and the Bowers Terrane in Northern Victoria Land (Antarctica) are wellsuited for evaluating the magmatic and structural evolution at the active paleo-Pacific continent margin of Gondwana during the Cambrian. One of these intrusions is the Tiger Gabbro Complex (TGC), a Cambrian arc-related, layered mafic complex which is characterized by extraordinary fresh rock sequences including ultramafic and evolved lithologies and by the presence of spectacular high-temperature shear zones. It is our overall goal to establish the petrogenesis of the TGC in order to evaluate the magmatic/ structural/geological evolution of deep crustal sequences active during the Cambrian at the margin of Gondwana. The second 12-month project will focus on microanalytical and bulk rock geochemical studies on samples which will be collected during the GANOVEX X expedition by one of the applicants (F. Henjes-Kunst). Additional sampling and scientific investigations on the new samples should help to clarify important new aspects concerning the magmatic evolution of the complex, which emerged during the first three months of research in the ongoing project KO 1723/11-1 (see below). Together with the work performed during the first period of this project these investigations will serve to better plan our far-reaching goal which will include a comprehensive experimental study as well as detailed geochronological and isotope geochemical work. A very close petrographic similarity with the Chilas Complex in Kohistan (Pakistan), a world site for deep, juvenile arc crust, opens interesting perspectives for the global understanding of crustal accretion beneath young island arcs.
北方维多利亚陆威尔逊地体与鲍尔斯地体缝合线上的基性/超基性杂岩是评价冈瓦纳古太平洋大陆边缘寒武纪岩浆演化和构造演化的良好标志。这些侵入体之一是虎辉长岩杂岩(TGC),这是一个寒武纪与弧有关的层状镁铁质杂岩,其特征是异常新鲜的岩石序列,包括超镁铁质和演化的岩性,以及壮观的高温剪切带的存在。我们的总体目标是建立TGC的岩石成因,以评估冈瓦纳大陆边缘寒武纪活动的深部地壳序列的岩浆/构造/地质演化。第二个为期12个月的项目将侧重于对申请者之一(F。Henjes-Kunst)。对新样品进行更多的取样和科学调查应有助于澄清有关该杂岩岩浆演化的重要新方面,这些方面是在进行中的项目KO 1723/11-1(见下文)的头三个月研究期间出现的。这些调查与本项目第一阶段的工作一起,将有助于更好地规划我们的深远目标,其中包括全面的实验研究以及详细的地质年代学和同位素地球化学工作。一个非常密切的岩相学相似性与奇拉斯复杂的科希斯坦(巴基斯坦),一个世界网站的深,少年弧地壳,打开了有趣的观点,为全球了解年轻岛弧下的地壳增生。

项目成果

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Professor Dr. Jürgen Koepke其他文献

Professor Dr. Jürgen Koepke的其他文献

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{{ truncateString('Professor Dr. Jürgen Koepke', 18)}}的其他基金

Understanding felsic veins in gabbros drilled by IODP at Atlantis Bank (Southwest Indian Ridge): Formation, metamorphism, and their role as multifunctional pathways for fluid and mass transfer
了解 IODP 在亚特兰蒂斯浅滩(西南印度洋中脊)钻探的辉长岩中的长英质脉:形成、变质作用及其作为流体和质量传递多功能途径的作用
  • 批准号:
    408055224
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
A profile of multiple sulfur, oxygen, strontium isotopes and related chalcophile elements through lower slow-spreading crust (IODP Expedition 360, Atlantis Bank, Southwest Indian Ridge)
低速扩张地壳中多种硫、氧、锶同位素和相关亲铜元素的分布图(IODP Expedition 360,亚特兰蒂斯浅滩,西南印度洋中脊)
  • 批准号:
    319774021
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Silicate liquid immiscibility and the formation of Fe (±Ti ±P ±F ±REE) ore deposits
硅酸盐液体不混溶性与Fe(±Ti±P±F±REE)矿床的形成
  • 批准号:
    268008671
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Melt/rock interaction and fractional crystallization in the lower crust at Hess Deep Rift, East Pacific Rise: A combined analytical and experimental study
东太平洋海隆赫斯深裂谷下地壳熔体/岩石相互作用和分异结晶:分析与实验相结合的研究
  • 批准号:
    279047586
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Assimilation, contamination and felsic melt generation at the top of the axial melt lens at fast-spreading oceanic crust: Combined geochemical and experimental investigations at the dike/gabbro transition from IODP Site 1256 (East Pacific Rise)
快速扩张的洋壳轴向熔体透镜体顶部的同化、污染和长英质熔体生成:对 IODP 站点 1256(东太平洋海隆)的岩脉/辉长岩转变进行地球化学和实验联合研究
  • 批准号:
    224563012
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
The Gabbro/Dike transition in oceanic crust generated at slow- and ultraslow-spreading ocean ridge systems
慢速和超慢速扩张的洋脊系统产生的洋壳中的辉长岩/岩脉转变
  • 批准号:
    227716517
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Additional pre-survey for the project "Establishing a reference profile for fast-spreading oceanic crust: Petrology and geochemistry of the Wadi Gideah cross section in the Oman ophiolite"
“为快速扩张的洋壳建立参考剖面:阿曼蛇绿岩中 Wadi Gideah 横截面的岩石学和地球化学”项目的额外预调查
  • 批准号:
    214445455
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Time scales for vertically moving axial magma chambers at fast-spreading ocean ridges and involved magmatic reactions: Insights from IODP Site 1256
快速扩张的洋脊上垂直移动的轴向岩浆室的时间尺度以及涉及的岩浆反应:来自 IODP Site 1256 的见解
  • 批准号:
    143034347
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
High temperature hydrothermal activity in the deep oceanic crust: Experiments and investigations on natural rocks in the Oman ophiolite
深洋地壳的高温热液活动:阿曼蛇绿岩天然岩石的实验和研究
  • 批准号:
    116858737
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
A combined petrological, geochemical and geochronological study of the magmatic rocks surrounding the Logatchev hydrothermal field.
对洛加切夫热液田周围岩浆岩进行岩石学、地球化学和地质年代学的综合研究。
  • 批准号:
    54904092
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes

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