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Tectonic Terranes and Crustal Modification in Granite-Rhyolite Province Ga Resulting in Nd-line

Explore the accretion of the Granite-Rhyolite Province (1.55-1.35 Ga) and the emplacement of anorogentic granites (1.48-1.35 Ga) leading to the generation of TIKL. Discover how terranes are stitched together and crustal modification is observed through magnetic contrasts and anomaly mapping. Investigate the implications of high and low susceptibility regions on the crustal thickness.

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Tectonic Terranes and Crustal Modification in Granite-Rhyolite Province Ga Resulting in Nd-line

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  1. Accretion of Granite-Rhyolite Province (1.55-1.35 Ga) resulting in the Nd line Whitmeyer and Karlstrom, 2007 • Terranes stitched together by the emplacement of anorogentic granites (1.48-1.35 Ga) – generation of TIKL? Whitmeyer and Karlstrom, 2007

  2. Previous Geophysical Observations Depth integrated magnetic contrasts • Long wavelength magnetization • Change in magnetization aligns with Nd-line • Warm colors  high susceptibility • Cool colors  low susceptibility (Ravat, 2007 ) Full-spectrum magnetic anomaly map • Short wavelength magnetic anomalies • Do magnetic highs mark locations of intrusive events that modified the crust? • Abrupt transition from high to low anomaly marks the TIKL Warm colors  high susceptibility Cool colors  low susceptibility (Ravat et al., 2009)

  3. Crustal modification

  4. OIINK Crustal Thickness

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