Geochemistry of the Palaeo–Mesoproterozoic Tadpatri shales, Cuddapah basin, India: implications on provenance, paleoweathering and paleoredox conditions

Detachment levels of Colombian caribbean mud volcanoes

“…On the other hand, the ratios of trace element concentrations such as Th/Co and La/Sc (Figure 4), tend to be low in the mud volcanoes along the Serranía del Sinú (Family one), while they increase in the mud volcanoes along the Serranía de San Jacinto, Serranía de Tubará, and VIM basin (Family two). Comparison of oxide ratios and trace element concentrations obtained in this work, with geochemical characterization studies of clays (Amajor, 1987; El-Wekeil and El-Anwar, 2013; Chen et al, 2016;Mitra, et al, 2018), suggest that TiO 2 vs Al 2 O 3 and Th/Co vs La/Sc ratios are similar to those observed in Family One mud volcanoes, are characteristic of sediments from source areas composed of basaltic rocks, whereas ratios similar to those observed in Family two mud volcanoes suggest sediment sources from areas composed mainly of granitic rocks (Figure 4). Global studies of the Th/Lt ratio in marine sediments and basaltic arcs (Planke, 2005) suggest that 1 of mud volcanoes (11,200 km 2 ), it is located in the southern and central part of the Guajira offshore basin and the northern part of the Serranía de Tubará (Figure 1 and Table 4), with an intermediate occurrence of mud volcanoes (0.025 mud volcanoes/25 km 2 ), with an average area per mud volcano of 2.8 km 2 (relatively small), average ellipticity of 23% (significant ellipticity), and heights above ground averaging 149 m. Block 4 of mud volcanoes: This block is located north of the Guajira Peninsula, in the offshore domain, with an area of 8,100 km 2 (Figure 1 and Table 4), with a similar occurrence of mud volcanoes to those recorded in Block 3 (0.025 mud volcanoes/25 km 2 ), characterized by mud volcano buildings with large areas (5.1 km 2 on average), mean ellipticity values of 16% (slightly elliptical), and heights above the ground averaging 71 m. values lower than 0.4, such as those observed in mud volcanoes of Family one and part of Family Two (Figure 5), are characteristic of sediments from metalliferous sedimentary sources or from volcanic arcs with significant basaltic input.…”

Sedimentological and geochemical characterization of DF-2 well, Onshore Western Niger Delta: Implications for provenance, tectonic history and paleo depositional conditions

“…The composition of siliciclasticfacies depends on the principal chemical composition of the source rock area and the tectonic history of the depositional basins (Das and Haake, (2003); Jin et al, (2006). Previous researchers such as; Cullers (2000); Cingolani et al, (2003); Armstrong-Altrin et al, (2004); Akinyemi et al, (2013); Chen et al, (2016); Mitra et al, (2018); Amiewalan and Lucas, (2020) among others, had worked on the Niger Delta sediments and other Basins to interpret their provenance, tectonic history, paleodepositional conditions and classification of associated sandstone facies. This study intends to use the major and trace element geochemistry to define the provenance, tectonic history, paleo-depositional conditions of sediments in the DF-2 well, offshore western Niger Delta .This will further enhance the already existing information in this region and would be of immense value to researchers and explorationists.…”

Textural and geochemical characteristics of late Pleistocene to Holocene fine-grained deep-sea sediment cores (GM6 and GM7), recovered from southwestern Gulf of Mexico

“…The composition of terrigenous sediments is largely influenced by the nature of parent rocks and sedimentary processes during transportation and within the depositional basin (Armstrong-Altrin 2015; Basu 2017). Hence, the spatial and temporal variations during sedimentation can be able to understand by the mineralogical and geochemical compositions of sediments, and numerous studies utilized these as a device to understand sediment provenance (Bhattacharjee et al 2017;Craigie 2018;Hou et al 2017;Mitra et al 2017;Paikaray et al 2008;Saha et al 2010Saha et al , 2018Verma et al 2016a;Verma and Armstrong-Altrin 2016;Wang et al 2017aWang et al , 2017b. In sediments, unstable minerals and mobile elements can be affected easily by weathering and erosional processes during transportation.…”