نتایج جستجو برای: carbonate sediment
تعداد نتایج: 61087 فیلتر نتایج به سال:
Lithium has become a metal of enormous interest worldwide. The extensive use recharge-able batteries for range applications pushed rapid growth in demand lithium carbonate. This compound is produced by crystallization, reaction with chloride (in solution) and adding sodium Low sedimentation rates the evaporation pools present problem crystallization process. For this reason, work, mineral sedim...
Quarrying in Scioto Township, Delaware County, Ohio, in 1966-67 uncovered an area of well-developed ripple marks at the top of the Columbus Limestone (Middle Devonian) and beneath a few inches of "bone bed" at the base of the overlying Delaware Limestone. The ripples averaged about 19 inches in wavelength and 1.5 inches in ripple height; they had smoothly rounded crests and were notably symmetr...
A 403-day in situ field experiment at Ocean Drilling Program Site 892B sought to quantify the flux of methane along a fluid-active fault and to experimentally determine rates of methane hydrate and authigenic carbonate deposition associated with fluid expulsion from the borehole. An instrument package was deployed that osmotically sampled fluid, measured borehole pressure and flow rates, and co...
Sedimentary phosphorus species concentrations were examined in cores (0-10 cm) from 5 locations in the open middle Adriatic in June 2002. Measurements included organic phosphorus (OP) and inorganic P species: P in biogenic apatite (P-FD), P adsorbed onto iron-oxy/hydroxides (P-Fe), P in authigenic apatite (P-AUT) and P in detrital apatite (P-DeT). Total iron (Fe-TOT) and iron-oxyhydroxides (Fe(...
The back-calculation technique for evaluating the anthropogenic CO2 (CANT) input corrects total inorganic carbon for the remineralization of organic matter and the dissolution of calcium carbonate, along with subtracting the pre-industrial equilibrium total inorganic carbon. This technique is mainly dependent on the estimation of the preformed values of total alkalinity, oxygen and partial pres...
Daniel Jean Stanley. Parallel Laminated Deep-Sea Muds and Coupled Gravity Flow-Hemipelagic Settling in the Mediterranean. Smithsonian Contributions to the Marine Sciences, number 19, 19 pages, 7 figures, 1983.—The origin of fine-grained deep-sea facies is often blurred because of interplay of diverse transport mechanisms: sediment gravity flow, traction related to fluid-driven circulation, and ...
Sediment mass accumulation rate (MAR) is a proxy for paleoceanographic conditions, especially if biological productivity generated most of the sediment. We determine MAR records from pelagic calcareous sediments in Tasman Sea based on analysis 11 boreholes and >3 million seismic reflection horizon picks. Seismic data regions 10,000–30,000 km2 around each borehole were analyzed using Internation...
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