Geochemically, the sediments are classified as litharenites, shale, and wacke. The ICV (Index of Compositional Variability) values (0.92 to 1.10) indicate that the sediments have low compositional and mineralogical maturity. Major and trace element abundances display marked depletion of Na2O, CaO,...
Both columns and detectors are maintained at 30 °C. The ion chromatography system was run as described previously [20] with the following modifications. Anions were resolved by a 2 mm Dionex IonPac AS19 analytical column protected by a 2 mm Dionex IonPac AG19 guard column (Thermo...
and\({\mathrm{B}}_{\mathrm{i}}\)is the metal geochemical background value. The contamination factors are classified as follows: 0 = no contamination; 1 = none to medium; 2 = moderate; 3 = moderate to heavy; 4 = contaminated; 5 = heavy to very heavy; 6...
Such as hydrates have the potential to become unconventional natural gas resources. Hydrates in sand are expected to be produced through conventional oil and natural gas drilling techniques, and methods are being developed to exploit this production. National projects for methane hydrate development have...
If the sediment layer consists of at least 30% microscopic biogenous material, it is classified as a biogenous ooze . The remainder of the sediment is often made up of clay . Where are the thickest marine sediments located? Sediment is thickest in the ocean basins in the areas around the...
In the studies of the Ryoke metamorphic belt of central Japan, we classified the granitic rocks into two groups, the granitic rocks intruded into the Nohi rhyolite probably of the Late Cretaceous and the older ones, and clarified that the formation of the Ryoke metamorphic rocks is closely asso...
1999), all the investigated water samples were classified as “near-neutral, low-metal” water (Fig. 7, right) thus confirming (1) the role of carbonate dissolution which resulted in natural pH buffering effects, (2) the moderate stability of primary and secondary ore-bearing minerals, and ...
(95%) will be classified as anthropogenically influenced. They are removed from the data set, and a new linear equation is constructed with the updated data set until all data falls within the 95% confidence band. The normalising element must be an important component of one or more of the...
The level of induration prevented an evaluation of the particle size distribution, although the D50 was visually estimated (from thin sections) as ranging between 0.25 and 0.5 mm, with the ridges therefore classified as calcarenite55. De Grey River delta The De Grey River delta is the largest...
Hadal trenches are the deepest and most remote regions of the ocean. The 11-kilometer deep Challenger Deep is the least explored due to the technical challenges of sampling hadal depths. It receives organic matter and heavy metals from the overlying wate