Earth Sciences

Volume 4, Issue 4, July 2015

  • Archean Metallogeny and Crustal Evolution in the East Indian Shield

    Tapan Kumar Baidya

    Issue: Volume 4, Issue 4-1, July 2015
    Pages: 1-14
    Received: 20 March 2015
    Accepted: 26 March 2015
    Published: 29 July 2015
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    This article belongs to the Special Issue Archean Metallogeny and Crustal Evolution
    Abstract: East Indian Shield bears the evidences of Archean metallogenic and crustal evolution like the other major shield areas of the world. The primordial continental crust in the form of more silicic bodies were floating like metallurgical slags over the hotter and denser ultramafic-mafic lithosphere (UM-ML) before 3800 Ma. Earliest sediments, now repres... Show More
  • Titaniferous Magnetite Deposits Associated with Archean Greenstone Belt in the East Indian Sheild

    Riya Mondal, Tapan Kr. Baidya

    Issue: Volume 4, Issue 4-1, July 2015
    Pages: 15-30
    Received: 4 May 2015
    Accepted: 7 May 2015
    Published: 29 July 2015
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    This article belongs to the Special Issue Archean Metallogeny and Crustal Evolution
    Abstract: In the East Indian Shield, occurrence of titaniferous magnetite deposits associated with the Archean Greenstone belt occur in Kumhardubi, Betjharan and Nuasahi areas of Odisha and Dublabera area of Jharkhand. The ore bodies comprise lenses, veins, bands and patches within gabbroic rocks. Petrogenetic studies have revealed the primary and secondary ... Show More
  • Iron and Manganese Mineralization Associated with Archean Greenstone Belt in Joda-Noamundi Sector, Odisha, East Indian Shield

    R. Ghosh, D. Chakraborty, M. Halder, T. K. Baidya

    Issue: Volume 4, Issue 4-1, July 2015
    Pages: 31-39
    Received: 4 May 2015
    Accepted: 6 July 2015
    Published: 29 July 2015
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    This article belongs to the Special Issue Archean Metallogeny and Crustal Evolution
    Abstract: Iron and manganese mineralization in the Joda-Noamundi sector is associated with Banded Iron Formation of the Archean Iron Ore Group of rocks (3.5-3.0 Ga).Both Mn and Fe mineralization is stratiform and stratabound. In the Noamundi basin the estimated reserve of Fe and Mn -ores are 3.3 Gt and 130 Mt respectively. The Fe and Mn-mineralization are al... Show More
  • Gold Mineralisation in Chigargunta Area of the Kolar Schist Belt, South India- A Part of the Archean Greenstone Belt

    Debasish Roy

    Issue: Volume 4, Issue 4-1, July 2015
    Pages: 40-45
    Received: 23 April 2015
    Accepted: 5 May 2015
    Published: 29 July 2015
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    This article belongs to the Special Issue Archean Metallogeny and Crustal Evolution
    Abstract: Gold mineralisation is reported for the first time in ‘Champion gneiss’ (quartzo-feldspathic schist) a felsic unit,in the eastern sector of the Chigargunta area (Lat: 120 430300N, Long:780 150 000E) of the Kolar schist belt, South India, during 1979-80. Quartzo-feldspathic gneiss and hornblende schist are the predominant rock types of the area. The... Show More