Year: 2024
Type: article
Abstract: Spheroidal weathered siliciclastic rocks of the Imphal Valley, Indo-Myanmar Ranges were studied to determine paleoclimate, paleoweathering and mineral alteration based on the geochemical and mineralogical compositions. The Chemical Index of Alteration (CIA) suggests low-intermediate chemical weathering. Plagioclase Index of Alteration (PIA) value indicates incipient plagioclase alteration. Mineralogical Index of Alteration (MIA) reveals incipient to intermediate mineralogical alteration and the A-CN-K ternary plot of the studied samples suggests a low rate of alteration. The results suggest semi-arid climate, which ranges from warm-arid to warm cool conditions. Geochemistry and mineralogy indicate felsic, mafic and ultramafic compositions for the siliciclastic rocks.
Author: Salam Ranjeeta Devi
Institution: Manipur University
Language: English
Subfield: Geochemistry and Petrology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4405815410