The aim of this work was to relate depth profiles of prokaryotic community composition with geochemical processes in the deep subseafloor biosphere at two shallow-water sites on the Peru Margin in the Pacific Ocean (ODP Leg 201, sites 1228 and 1229). Principal component analysis of denaturing gradient gel electrophoresis banding patterns of deep-sediment Bacteria, Archaea, Euryarchaeota and the...

Spawning market squid lay embryo capsules on the seafloor of the continental shelf of the California Current System (CCS), where ocean acidification, deoxygenation and intensified upwelling lower the pH and [O2]. Squid statolith geochemistry has been shown to reflect the squid’s environment (e.g., seawater temperature and elemental concentration). We used real-world environmental levels of pH a...

Mapping geochemical anomaly is essential for prospecting. Kriging is often used to characterize the spatial variability of geochemistry. However, due to its smooth effects, it is incapable of detecting multi-location uncertainty of geochemistry estimate. Sequential gaussian simulation (SGS) can model the spatial uncertainty through generation of several equally probable stochastic realizations....

Flow and nutrient dynamics in a subterranean estuary (Waquoit Bay, MA, 1 USA): field data and reactive transport modeling 2 3 Claudette Spiteri, Caroline P. Slomp, Matthew. A. Charette, Kagan Tuncay 4 and Christof Meile 5 (1) Department of Earth Sciences – Geochemistry, Faculty of Geosciences, Utrecht 6 University, P.O. Box 80021, 3508 TA Utrecht, The Netherlands; [email protected], 7 slomp@g...

The Berriasian-Valanginian Fahliyan Formation forms one of the giant reservoirs in the subsurface of the Abadan plain, onshore Iran. A detailed petrographical analysis of the available cores and thin sections revealed that the different diagenetic parameters influenced the reservoir quality of the Fahliyan Formation in this field. The Fahliyan Formation has been influenced by three diagenetic e...

The Kapuskasing Structural Zone transects the Wawa and Abitibi greenstone belts in Superior province of Canadian Shield. At southern margin (KSZ), Borden Gold deposit hosts low-grade-gold mineralization within upper amphibolite- to granulite-facies sillimanite-garnet-biotite gneisses. Here, we present geochemistry Lu-Hf geochronological studies a gold-hosting garnet-bearing gneiss constrain for...

Large Igneous Provinces (LIPs) are unusual volcanic events in which massive amounts of melt (∼106 km3) erupt relatively short time periods (<106 years). Most LIP magmas have undergone extensive fractional crystallization and crustal contamination, but the magmatic plumbing systems processes triggering eruptions poorly understood. We present new major trace element radiogenic isotope data for 43...

In present study, the effect of reservoir length on seismic performance of concrete gravity dam has been investigated. Monte Carlo probabilistic analysis has been used to achieve a sensitivity of the responses to variation of truncated reservoir length in finite element model. The ANSYS software based on finite element method is applied for modeling and analysis. The Pine Flat dam in California...

The Ziyun-Luodian area of southern Guizhou province in China is chosen as the research and Dawuba formation Carboniferous system target stratum this paper. Combined with laboratory experiments mathematical analyses, geological evaluations on organic geochemistry, physical property reservoir, gas bearing feature are all studied, controls occurrence then analyzed. following conclusions achieved. ...

Dissolution is inherent to fluid-mineral systems. Yet its impact on minerals reacting with electrolytes overlooked. Here, a novel nonmonotonic behavior for the surface interactions of carbonates (calcite and Mg-calcite) organic acids reported. Applying bioinspired approach, Mg-calcite sensors via amorphous precursors, avoiding any preconditioning functional groups are synthesized. A quartz crys...