Supplemental material: Preliminary balanced palinspastic reconstruction of Cenozoic deformation across the Himachal Himalaya (northwestern India)
journal contributionposted on 16.05.2013, 00:00 by A. Alexander G. Webb
Geosphere, June 2013, v. 9, p. 572-587, doi:10.1130/GES00787.1, Plate 1 - Sequential cross-section restoration across the Himachal Himalaya along line A–A' (see Fig. 4). Abbreviations: Bt—Berinag thrust, Ct—Chaura thrust, GHC—Greater Himalayan Crystalline complex, MCt—Main Central thrust, Mt—Munsiari thrust, STd—South Tibet detachment, THS—Tethyan Himalayan Sequence, Tt—Tons thrust. (A) Schematic model of pre-Cenozoic stratigraphy (from Webb et al., 2011a). (B–G) Palinspastic reconstructions. (B) Initial configuration prior to significant Cenozoic shortening in the region. Differences between this model and the model in A allow minimum shortening (see note 1). (C) Development of the Tethyan fold and thrust belt. (D) Emplacement of the Main Central thrust hanging wall, synchronous with motion along the South Tibet detachment. Late top-to-the-southwest shear deforms the Main Central thrust hanging wall, creating the Phojal anticline. (E) Emplacement of Tons thrust and Berinag thrust hanging walls, initial development of antiformal stack of Indian basement (Munsiari Group). (F) Development of upper and middle crustal duplexes through underplating concurrent with frontal accretion of foreland basin strata and out-of-sequence faulting along the Munsiari thrust. (G) Last stage in the development of the current architecture involves continued underplating, frontal accretion, and out-of-sequence faulting. See Figure 5 for a detailed reconstruction of the Bilaspur thrust sheet emplacement. Abbreviations as in Figure 4. Plate size is 11 x 17. File size is ~1.2 MB.