Search
Search Results
-
Dynamic Response of Two-Degree-of-Freedom Riserless Drill String for Vortex-Induced Vibration Suppression and Enhancement
The mechanical behavior, dynamic evolution, and flow-field distribution of a two-degree-of-freedom riserless drill string were simulated numerically...
-
Mercury fluxes from hydrothermal venting at mid-ocean ridges constrained by measurements
Methylmercury is a potent toxin threatening the global population mainly through the consumption of marine fish. Hydrothermal venting directly...
-
Heat flux estimation from borehole temperatures acquired during logging while trip**: a case study with the sea floor drill rig MARUM-MeBo
During trip out of the drill string at the end of a drilling operation (logging while trip**) borehole temperatures can be measured without the...
-
Spatiotemporal variation of dissolved oxygen in the Ediacaran surface ocean and its implication for oceanic carbon cycling
The Ediacaran Period (635–539 Ma) witnessed the largest negative excursion in inorganic carbon isotope (δ 13 C carb ) over the Earth’s geological...
-
First Results of Stratigraphic Drilling in the East Siberian Sea Focused on Geological Studies of the Suture Zone of the Continental Shelf’s Marginal Structures and Deep-Water Areas of the Arctic Ocean
AbstractA shallow well was drilled in the East Siberian Sea for the first time with the purpose of geological study of the suture zone of deep waters...
-
Indian Ocean Ridge System and Seafloor Hydrothermal Activity
This paper presents a short review of some of the notable contributions by scientists from several parts of the world in furthering our understanding...
-
Core Investigation of the International Continental Scientific Drilling Program from the Cretaceous Songliao Basin (SK-1/SK-2/SK-3), NE China
The exploration of the universe, of the earth's interior and of the oceans are three great endeavors of humanity challenging nature in order to...
-
On the consolidation state of sediments from the accretionary prism offshore Vancouver Island, North Cascadia Margin
Sediment geotechnical properties are an important component of geohazard analyses and studies on submarine slope failures on continental margins. The...
-
Shear strength characteristics of marine sediments: the influences of lithofacies and sedimentological environment
The undrained shear strength of marine sediment is of vital importance because of its critical role in seafloor slope stability, seafloor...
-
Optimal Design of Riserless Test String for Deepwater Gas Hydrate
The South China Sea contains abundant gas hydrate resources buried in shallow layers due to geological reasons, and these resources have been...
-
Molecular fossils in reefal carbonates and sponges of the deep fore reef of Mayotte and Mohéli, Comoro Islands, western Indian Ocean
Microbial carbonates are common components of Quaternary tropical coral reefs. Previous studies revealed that sulfate-reducing bacteria trigger...
-
Ocean resurge-induced impact melt dynamics on the peak-ring of the Chicxulub impact structure, Mexico
Core from Hole M0077 from IODP/ICDP Expedition 364 provides unprecedented evidence for the physical processes in effect during the interaction of...
-
Flat Spots within Cenozoic Sediments of the Nansen Basin, Arctic Ocean: Indicators for Serpentinization, Gas Generation and Accumulation Processes
AbstractFlat spot anomalies in the Quaternary part of the section of the Nansen Basin are imaged in seismic records and are interpreted to be related...
-
A new method of coring in coal mine: pressure-holding and continuous coring technology
The quality and cost-effectiveness of rock core samples and rapid rock coring are main issues that need to be considered in the special operations of...
-
Reconstruction of ocean environment time series since the late nineteenth century using sclerosponge geochemistry in the northwestern subtropical Pacific
The geochemistry of calcifying marine organisms is an excellent proxy for reconstructing paleoceanographic history, but studies of hypercalcified...
-
Climatic and tectonic drivers of late Oligocene Antarctic ice volume
Cenozoic evolution of the Antarctic ice sheets is thought to be driven primarily by long-term changes in radiative forcing, but the tectonic...
-
Drilling Targets in the Polar Regions
Geotechnical and exploration drilling is widely applied for many purposes in the polar regions, including searching of the new mineral deposits, the...
-
Unraveling the Cenozoic carbon cycle by reconstructing carbonate compensation depth (CCD)
The Carbonate Compensation Depth (CCD) refers to the depth within the ocean where the production and dissolution rates of carbonates reach...
-
Northern Cascadia Margin Gas Hydrates—Regional Geophysical Surveying, IODP Drilling Leg 311 and Cabled Observatory Monitoring
This article reviews extensive geophysical survey data, ocean drilling results and long-term seafloor monitoring that constrain the distribution and...
-
Integrated Stratigraphy and Mineralogy of the Doushantuo Formation in Weng’an, South China, and Implications for Ediacaran Phosphogenesis
The Ediacaran–Cambrian Phosphogenic Episode is the Earth’s first true phosphogenic event and resulted in worldwide phosphate deposits, which occurred...