Mineralogical and geochemical (major, trace and rare earth elements) studies were carried out on the clay samples of the Terani Formation, South India to investigate the paleoweathering, source rocks characteristics and tectonic setting. The chemical index of alteration (CIA), plagioclase index of alteration (PIA) values and A-CN-K diagram indicate that clays were generated from source rocks of the upper continental crust affected by intense chemical weathering. The chondrite-normalized REE patterns show considerable LREE enrichment, HREE depletion with significant negative Eu anomalies. The REE patterns, elemental ratios like Al₂O₃/TiO₂ Cr/Ni, Eu/Eu*, (La/Lu)cn, La/Sc, Th/Sc, La/Co, Th/Co, and Cr/Th, discriminant function diagram, various bivariate and ternary plots indicate the contribution of sediments from felsic and intermediate source rocks. The discriminant-function-based tectonic setting diagrams reveal passive margin setting for the source area of the Terani Formation.

对印度南部印度特拉尼组的黏土样品进行了矿物学和地球化学（主要，痕量和稀土元素）研究，以研究古风化，烃源岩特征和构造环境。化学变化指数（CIA），斜长石蚀变指数（PIA）值和A-CN-K图表明，粘土是由强烈化学风化作用下的上陆壳烃源岩产生的。球粒陨石归一化的REE模式显示出大量的LREE富集，HREE耗竭以及明显的负Eu异常。REE模式，元素比如Al ₂ O ₃ / TiO ₂Cr / Ni，Eu / Eu *，（La / Lu）cn，La / Sc，Th / Sc，La / Co，Th / Co和Cr / Th，判别函数图，各种二元和三元图表明了长英质和中质烃源岩的沉积物。基于判别函数的构造设置图揭示了Terani地层源区的被动边界设置。