naa a22 4500 510756425 CHVBK 20180411083124.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s12594-013-0144-1 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0144-1 Geochemical and mineralogical characteristics of recent clastic sediments from lower Godavari river: Implications of source rock weathering [Elektronische Daten] [Shilpa Vuba, Sadia Farnaaz, Netramani Sagar, S. Ahmad] The major, trace and rare earth elements geochemistry and clay mineral compositions in the river bed sediments from lower reaches of Godavari river suggest that they are derived from weathering of felsic rocks. Trace and rare earth elemental compositions indicate evidence of sedimentary sorting during transportation and deposition. Lower concentrations of transition elements, such as V, Ni and Cr imply enrichment of felsic minerals in these bed sediments. The REE pattern in lower Godavari sediments is influenced by the degree of source rock weathering. The light rare earth elements (LREE) content are indicating greater fractionation compared to the heavy rare earth elements (HREE). A striking relationship is observed between TiO2 and gZREE content suggesting a strong control by LREE-enriched titaniferous minerals on REE chemistry. Shale-normalized REE pattern demonstrate a positive Eu anomaly, suggesting weathering of feldspar and their secondary products, which are enriched in Eu. Chondrite-normalised REE pattern is characteristic of felsic volcanic, granites and gnessic source rocks. Trace elemental compositions in sediments located near urban areas suggest influence of anthropogenic activity. Chemical Index of Alteration (CIA) is high (avg. 65.76), suggesting a moderate chemical weathering environment. X-ray diffraction analysis of clay fraction shows predominance of clay minerals that are formed because of the chemical weathering of felsic rocks. Geological Society of India, 2013 Godavari river sediments nationallicence Elemental compositions nationallicence Rare earth elements (REE) nationallicence Chemical weathering nationallicence Clay minerals nationallicence Vuba Shilpa CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut Farnaaz Sadia CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut Sagar Netramani CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut Ahmad S. CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut Journal of the Geological Society of India Springer India 82/3(2013-09-01), 217-226 0016-7622 82:3<217 2013 82 12594 https://doi.org/10.1007/s12594-013-0144-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0144-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vuba Shilpa CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Farnaaz Sadia CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Sagar Netramani CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut NATIONALLICENCE 700 1- Ahmad S. CSIR-National Geophysical Research Institute, Uppal Road, 500 007, Hyderabad, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/3(2013-09-01), 217-226 0016-7622 82:3<217 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer