Marine planktonic organisms that undertake active vertical migrations over their life cycle are important contributors to downward particle flux in the oceans. Acantharia, globally distributed heterotrophic protists that are unique in building skeletons of celestite (strontium sulfate), can produce reproductive cysts covered by a heavy mineral shell that sink rapidly from surface to deep waters...

The desmid green alga Closterium moniliferum belongs to a small number of organisms that form barite (BaSO(4)) or celestite (SrSO(4)) biominerals. The ability to sequester Sr in the presence of an excess of Ca is of considerable interest for the remediation of (90)Sr from the environment and nuclear waste. While most cells dynamically regulate the concentration of the second messenger Ca(2+) in...

Based on an integrated geochemical characterized by extremely high Sr and petrographic investigation of dolomites concentrations, which reflect high from two cores drilled on Great Bahama concentrations of Sr in the pore fluids. Bank, we have determined three different The high concentrations of Sr in the pore mechanisms of formation for the dolomites fluids arise through the continued which ar...

Data are presented for magnesium (Mg), calcium (Ca) and strontium (Sr) analyses for surface samples and conductivity–temperature–depth profiles of waters along three main transects across the Subtropical Front (STF) and the Subantarctic Front (SAF) in a region between Tasmania and New Zealand down to 57°S. This area is at the confluence of the Indian, Pacific and Southern Oceans where the Suban...

Investigations conducted during the GEOSECS program concluded that radium-226 (T 1/2 = 1602 y) and barium are tightly correlated in waters above 2500 m Atlantic, Pacific Antarctic Oceans, with a fairly uniform 226 Ra/Ba ratio of 2.3 ± 0.2 dpm µmol -1 (4.6 nmol Ra/mol Ba). Here, we report new Ra Ba data obtained at three different stations Ocean: K1 K3 North-West station old Hale Aloha, off Hawa...

Elemental contents and Sr isotopic data of calcite celestite infillings from various tectonic microstructures the so-called “Main Fault” that occurs in Opalinus Clay Formation (Switzerland) were used to elaborate on geochemical impact this structural system fine-grained host sediments. The chemical leachates vein, slickenside gouge are significantly different those diffuse undeformed highly def...

Abstract The Middle-Jurassic Opalinus Clay is the foreseen host rock for radioactive waste disposal in central northern Switzerland. An extensive drilling campaign aiming to characterize argillaceous formation resulted a comprehensive drill core data set. rheologically weak only mildly deformed compared over- and underlying units but shows variety of natural fractures. While these structures ar...

To understand partitioning of produced water (PW) constituents using thermal desalination, PW from the Delaware Basin was desalinated a crystallization process and modeled OLI Systems, Inc. (OLI, Parsippany, NJ, USA) chemistry software. The incorporation pretreatment step, steam stripping, prior to desalination predicted be effective at removing hydrocarbons (across range volatilities). As expe...