Trace element characterisation of Cretaceous Orange Basin hydrocarbon source rocks

Geochemical characterization of Neogene sediments from onshore West Baram Delta Province, Sarawak: paleoenvironment, source input and thermal maturity

“…Molybdenum (Mo) can also be used as a proxy for depositional conditions. It has been observed that Mo is associated with humic acids in the organic matter [8,38,39]. Previous work suggested that the concentrations of Mo increase with increasing anoxic conditions [11,40,41].…”

“…The purpose of this study is to provide information of the source input, depositional environment conditions and thermal maturation in the studied sediments. The study of trace element in potential source rocks are widely applied and successfully used because of their importance in exploration [7][8][9][10]. The concentration, distribution, and nature of metals in source rocks can give information on source input, depositional environment conditions and thermal maturity [9,11].…”

Paleoenvironments and Geochemical Signals from the Late Barremian to the Middle Aptian in a Tethyan Marginal Basin, Northeast Spain: Implications for Carbon Sequestration in Restricted Basins

“…4-4). These productivity pulses may have induced enhanced Ni intake by plankton and its fixation with OM, hence subsequent incorporation to the sediment (Tribovillard et al, 2006;Akinlua et al, 2010). Nonetheless, the presence of framboidal pyrite with sizes between 5 and 10 m (Fig.…”

“…7-8). In the case of the high Ni/Al index, the positive correlation with a peak in Si/Al implies that in addition to the autochthonous organic matter, enhanced incorporation of terrigenous OM increased Ni absorption in organometallic compounds that heightened Ni concentration in the sediments (Nijenhuis et al, 1999;Akinlua et al, 2010;Chapter 4).…”

Lower Aptian Comparative Stratigraphy of the Basco-Cantabrian Region (Spain) and Eastern Cordillera (Colombia): implications for local factors in the depositional record of Oceanic Anoxic Event 1a (OAE-1a)

“…Concentration of of individual trace elements and interelemental ratios provide useful proxies to identify levels of bottom-water redox conditions or primary productivity ). In fact, elemental ratios such as V/(V+Ni), V/Cr, Ni/Co and U/Th have been demonstrated as reliable proxies to estimate paleoredox conditions (Lewan, 1984;Hatch and Leventhal, 1992;Jones and Manning, 1994;Rimmer et al, 2004;Akinlua et al, 2010;Śliwiński et al, 2011). Nonetheless, their use is constrained when the trace element concentrations are in sediments consisting predominantly of terrigenous components.…”