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Understanding the Neoproterozoic geodynamics of NW India: clues from tectonomagmatic studies of the Cryogenian Sindreth Basin at the eastern Malani Igneous Province

Understanding the Neoproterozoic geodynamics of NW India: clues from tectonomagmatic studies of the Cryogenian Sindreth Basin at the eastern Malani Igneous Province
了解印度西北部新元古代地球动力学:来自马拉尼火成岩省东部成冰纪辛德雷盆地构造岩浆学研究的线索
批准号:
278247024
负责人:
Professorin Dr. Helga de Wall
金额:
$0.0万
依托单位国家:
德国
项目类别:
Research Grants
财政年份:
2015
资助国家:
德国
项目状态:
已结题
起止时间:
2014-12-31 至 2019-12-31

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中文摘要
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英文摘要
The Sindreth basin in NW India can be regarded as archive for the multiphase pulses of bimodal volcano-plutonic melts representing a characteristic feature of the c. 20 Ma lasting Malani magmatic activity. The Neoproterozoic Malani Igneous Suite (MIS) in NW India along with analogous magmatic rocks from the adjoining Nagarparkar region in SE Pakistan can be classified as a Silicic Large Igneous Province (SLIP). This magmatic event includes predominant felsic volcanism, granite emplacement and felsic and mafic dyke intrusions. Felsic rocks have typical A-type affinity originated from high temperature melting with major crustal input. It has been evaluated during the first project phase that mafic volcanics and dykes of the bimodal suite show geochemical homogeneity and derivation from a depleted continental mantle source without significant crustal contamination. In this second project phase we will study the geochemical and radiogenic isotope composition of the mafic rocks in order to determine (1) their relation to the felsic MIS rocks, (2) the mantle source(s) of the dykes, (3) the possible contamination with crustal rocks of different tectonic blocks, and (4) the potential origin from melting of subcontinental lithospheric mantle that could be similar to the 65-million-year-old Deccan flood basalts. The geochemical study will thus provide insight into the origin of the large volumes of magmas of the MIS and on the structure and composition of the lithosphere at the boundary between the Marwar and Aravalli Cratons.
期刊论文(2)
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会议论文
DOI: 10.1007/s12040-017-0855-6
发表时间: 2017-09
期刊: Journal of Earth System Science
影响因子: 1.9
作者: [S. Schöbel;K. K. Sharma-K.;Thorsten Hörbrand;Theresa Böhm;Ines Donhauser;H. Wall]
通讯作者: S. Schöbel;K. K. Sharma-K.;Thorsten Hörbrand;Theresa Böhm;Ines Donhauser;H. Wall
DOI: 10.1016/j.jseaes.2018.04.016
发表时间: 2018-07
期刊: Journal of Asian Earth Sciences
影响因子: 3
作者: [H. de Wall;M. Pandit;Ines Donhauser;S. Schöbel;Wei Wang;K. K. Sharma-K.]
通讯作者: H. de Wall;M. Pandit;Ines Donhauser;S. Schöbel;Wei Wang;K. K. Sharma-K.
Differences in isotopic signature of Neoproterozoic crust of NW India - evidence for a lithospheric boundary?
Microstructural characterisation of ultracataclastic zones in quartzites by electron microscopy
Characteristics of the paleosol at the Archean - Proterozoic contact in the Aravalli Craton, NW India and paleoclimatic implications
Mechanism of granitoid emplacement in the Pan-African basement of Northern Ethiopia
  • 批准号:
    16789105
  • 项目类别:
    Research Grants
  • 资助金额:
    $0.0万
  • 财政年份:
    2005
  • 负责人:
    Professorin Dr. Helga de Wall
  • 依托单位:
海外基金