Recent studies in the Proterozoic sedimentary belt of Himalaya (original) (raw)

Contributions to the Proterozoic–Phanerozoic successions in the Himalaya: Status report 2020-2024

Proceedings of the Indian National Science Academy. Part A, Physical Sciences, 2024

82 publications by Indian geoscientists pertaining to the Proterozoic–Phanerozoic have come out during the last four years (2020–2024). Guide Books for the IGC 2020, GSI publication on the Precambrian sequences and a publication on the evolution of the Lesser Himalaya provide glimpses of regional geology. Other publications deal with geochemistry, sedimentology, isotope geology, palaeontology, and stratigraphy. A succinct summary of the publications is presented with short comments where necessary.

Terminal Neoproterozoic (Ediacaran) Chemostratigraphy of the Lesser Himalaya, India

New Ediacaran ol3C chemostratigraphic data from the Garhwal Syncline, Uttarakhand Lesser Himalaya, India, is being reported. A composite J13C profile for the Krol Formation (Ediacaran System) is prepared based on new data from the Rikhnikhal and Lux.manjhula sections of the Garhwal syncline and previously published J l3C data from Mussoorie Syncline. The Blaini diamictites and the overlying pink cap carbonates are well developed in both the sections representing Neoproterozoic glacial MarinoanIBlainian event. The Lower Krol Formation is shaly limestone and characterized by Vendotaenids. The Blaini pink cap microbial carbonate shows a negative Jl3C ex.cursion (-3% (%POB) characteristic of cap carbonates globally. ol3C values rise to + 6 % (% POB in the overlying Krol carbonates. The Krol carbonates are cherty, oolitic, stromatolitic and have yielded well preserved Ediacaran medusoids and frondose forms in the upper siIty layers (Krol 0 Member). A negative J13C ex.cursion has been rec...