1 / 19

Iron Ore Group, Eastern Indian Craton Asish Basu University of Rochester New York 14627

Iron Ore Group, Eastern Indian Craton Asish Basu University of Rochester New York 14627.

vickil
Download Presentation

Iron Ore Group, Eastern Indian Craton Asish Basu University of Rochester New York 14627

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Iron Ore Group, Eastern Indian Craton Asish Basu University of Rochester New York 14627

  2. Geological map of the Eastern Indian Craton in the Singhbhum-Orissa region of the Indian continent (see inset) modified after [13] and [17]. The current study area is to the north of Bonai Granite. The sandstones of this study are from the Darjing group, west of Singhbhum Granite. Samples analyzed are from a sedimentary succession shown by the crossed box. Abbreviations: OMG, Older Metamorphic Group; OMTG, Older Metamorphic Tonatile Gneisses. The ages of the relevant rocks are: Tamperkola Granite, ~2.8 Ga; Bonai Granite, ~3.2 Ga; Singhbhum Granite Complex, ~ 3.1 Ga; OMTG, ~3.3 Ga; OMG, ~ 3.3Ga. See text for geologic-lithologic details.

  3. Nb/Ta ratios vs. Zr/Sm ratios of the analyzed sandstones compared to the Archean tonalite-trondhjemite gneisses (TTGs) and present day continental crust and adakites. Also shown are modern day MORBs, OIBs, and island arc basalts (IABs)[38]. The sandstones of this study are identical to Archean TTGs, indicating that the protoliths of the sandstones formed in similar petrotectonic environment.

  4. Th/U = 1.7 to 2.5 0.5 mm

  5. Age = 3.4Ga eNd(T) = -4.9 eNd(0) = -38.2

  6. eNd(3.4Ga) = +2.8 to +6.8 eNd(3.4Ga) = +0.4 to +3.8 eNd(3.4Ga) = +0.8 to +6.0

  7. Geological map of the Eastern Indian Craton in the Singhbhum-Orissa region of the Indian continent (see inset) modified after [13] and [17]. The current study area is to the north of Bonai Granite. The sandstones of this study are from the Darjing group, west of Singhbhum Granite. Samples analyzed are from a sedimentary succession shown by the crossed box. Abbreviations: OMG, Older Metamorphic Group; OMTG, Older Metamorphic Tonatile Gneisses. The ages of the relevant rocks are: Tamperkola Granite, ~2.8 Ga; Bonai Granite, ~3.2 Ga; Singhbhum Granite Complex, ~ 3.1 Ga; OMTG, ~3.3 Ga; OMG, ~ 3.3Ga. See text for geologic-lithologic details.

More Related