This paper aims at assessing the concentrations of heavy metals and the isotopic composition of lead 210Pb in different fractions of sediment produced in the watershed that makes up the Mãe d'água dam and thus characterizing the distribution of metals along the sedimentary column and inferencing in the urbanization of the same process. Sample collection was carried out in June 2014; eight sedim...

The geochemical composition of sediment pore water was investigated in comparison with the composition of sediment particles and surface water in an estuary within one of the most industrialized areas in Latin America (Santos-Cubatão estuarine system, SE Brazil). Pore and surface waters presented anomalously high levels of F(-), NH4(+), Fe, Mn and P due to two industrial point sources. In the s...

The role of sediment biogeochemistry on diffusive flux of inorganic P was examined under laboratory conditions using intact sediment cores obtained from a subtropical hypereutrophic lake. The effect of light and dark conditions in the water column on soluble P flux from sediments was measured over a period of 1 yr. Soluble reactive P (SRP) level in the overlying water column was low (<0.01 mg -...

A study on tin (Sn) mineralization indicator in Sungai Bahoi-Charok Jawa area was conducted through detailed field geological mapping and stream sediment geochemistry analysis. The consists mainly of Late Triassic igneous intrusion sedimentary rocks Carboniferous Kubang Pasu Formation. has successfully discovered a band brecciated phyllites along parts granite – phyllite contact zone limestone ...

ABSTRACT We here present the first comprehensive provenance study of Zambezi deep-sea fan, based on integrated petrographic, heavy-mineral, elemental-geochemistry, isotope-geochemistry, and detrital-zircon-geochronology analyses middle Pleistocene to Holocene turbidites. The Valley Fan represent submarine part an ∼ 5000-km-long sediment-routing system, extending from heart South African Plateau...

1 Cohen Geochemistry Group, Earth Surface Science Institute, School of Earth and Environment, Faculty of Environment, University of Leeds, Leeds, United Kingdom, 2 Rock-Water Interaction Group, Institute of Geological Sciences, University of Bern, Bern, Switzerland, 3 Interface Geochemistry, German Research Centre for Geosciences, Potsdam, Germany, 4 Nano-Science Centre, Department of Chemistry...

1575. Hunt, J.M., Philp, R.P. and Kvenvolden, K.A. (2002) Early developments in petroleumgeochemistry. Organic Geochemistry, 33 (9),

Desulfurivibrio alkaliphilus strain AHT2(T) is a strictly anaerobic sulfidogenic haloalkaliphile isolated from a composite sediment sample of eight hypersaline alkaline lakes in the Wadi al Natrun valley in the Egyptian Libyan Desert. D. alkaliphilus AHT2(T) is Gram-negative and belongs to the family Desulfobulbaceae within the Deltaproteobacteria. Here we report its genome sequence, which cont...

Community composition of the infaunal bivalve fauna of the St. Lucie Estuary and southern Indian River Lagoon, eastern Florida was sampled quarterly for 10 years as part of a long-term benthic monitoring program. A total of 38,514 bivalves of 137 taxa were collected and identified. We utilized this data, along with sediment samples and environmental measurements gathered concurrently, to assess...

A mixing model derived from first principles describes the bulk density (BD) of intertidal wetland sediments as a function of loss on ignition (LOI). The model assumes that the bulk volume of sediment equates to the sum of self-packing volumes of organic and mineral components or BD = 1/[LOI/k1 + (1-LOI)/k2], where k1 and k2 are the self-packing densities of the pure organic and inorganic compo...