Geological nvestigations in the Chukchi Sea and the adjacent areas of the Arctic Ocean during the RUSALCA-2009 expedition

Астахов, А. С.; Bosin, Aleksandr A.; Колесник, А. Н.; Korshunov, Dmitry; Crane, Kathleen; Logvina, E.

doi:10.1134/s1819714010060096

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…3) and in other cores taken in the pockmark craters [1,10]. They have a total carbonate content of up to 45%; the carbonates are represented by microcrystalline calcite and dolomite.…”

Section: Discussionmentioning

confidence: 90%

“…Seven bottom sediment cores up to 2.6 m long were obtained from the pockmark field [1,10]. The cores recovered a typical section of the deep water basin of the Arctic Ocean, which is represented by the alterna tion of sediments formed during glacial and intergla cial periods [24,33].…”

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

“…In the cores collected from pockmark craters, two cycles in the sedimentation conditions are distin guished on the basis of the color and some lithological parameters of the sediments [1,10]. They were studied in the most detail in core 12 (Fig.…”

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

“…All the revealed carbonate interlayers were found in the first gray horizon in cores 12 (G1, Fig. 3), 14, 15, and 18 [1] or lower but already without visible relations with the lithostratigraphic horizons. The highest carbonate content (45%) was noted in core 16 [10].…”

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

“…1) by multibeam echo sounding on board the ice breaker Healy in 2003 [25]. Limited geological and geophysical works were carried out in this region dur ing the expedition of the R/V Professor Khromov in 2009 [1,10]. The obtained data cannot yet unambigu ously explain the nature of the craters and the reasons for their formation and localization in this region.…”

Section: Introductionmentioning

confidence: 99%

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Possible conditions and the formation time of the Chukchi Plateau pockmarks

et al. 2014

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The study of the bottom sediments accumulated during the last 60-65 ka in the pockmark craters of the Chukchi Plateau in the Arctic Ocean showed that their composition and lithostratigraphy in general are similar to those of the background areas. A specific feature is the presence of sedimentary interlayers and horizons with signs of gravitational stirring, carbonate mineralization, and accumulation under H 2 S contam ination conditions. The micropaleontological remains found in the pockmark sediments accumulated during the glacial periods are represented by redeposited species from Paleozoic, Mesozoic, and Cenozoic deposits, which are locally exposed in the pockmark walls. It was concluded that the pockmarks were formed under the influence of pulsed fluid flows. The present day topography of the pockmarks was formed at the last stage of active defluidization (35-20 ka ago).

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“…3) and in other cores taken in the pockmark craters [1,10]. They have a total carbonate content of up to 45%; the carbonates are represented by microcrystalline calcite and dolomite.…”

Section: Discussionmentioning

confidence: 90%

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

Section: Lithostratigraphy and Composition Of The Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Possible conditions and the formation time of the Chukchi Plateau pockmarks

et al. 2014

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Specific chemical and mineral composition of ferromanganese nodules from the Chukchi Sea

Kolesnik

Колесник

2013

Russian Geology and Geophysics

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The specific chemical and mineral composition of discoid, cake-shaped, and platy ferromanganese nodules (FMNs) from the Chukchi Sea are considered. The main ore components of these FMNs are Fe, Mn, and P. The contents of trace elements (except for Ba and Sr) do not exceed hundredths of percent. Maximum concentrations of most of these elements are specific for the cake-shaped nodules. In general, Mn accumulates most intensely in FMNs. Next (in order of decrease) are Ag(?), Co, and Pb; Sr, Fe, P, Y, and Ca; and Ni, La, Zn, and Cu. As for Ba, Cr, Mg, and K, they do not accumulate in the FMNs. “Dilution” is typical of Si, Al, Na, and Ti. The main ore phases are strengite and amorphous Mn hydroxides. It has been revealed for the first time for the Chukchi Sea that Cu, Zn, Sn, Ni, Pb, W, Bi, Cr, Fe, Ti, Ag, Au, Y, Zr, and La–Nd lanthanides form individual mineral microphases in FMNs: native elements, intermetallic compounds, oxides, and, much more seldom, tungstates, silicates, and phosphates. Accessory ore mineralization is the best pronounced and most diverse in the platy nodules. Though the FMNs from the Chukchi Sea are diagenetic, high-temperature fluids are, most likely, the source of microinclusions of various accessory ore minerals.

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Mineralogy and geochemistry of ferromanganese oxide deposits from the Chukchi Sea in the Arctic Ocean

Cui

Liu

et al. 2020

Arctic, Antarctic, and Alpine Research

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Abundant ferromanganese oxide deposits were recovered from the Chukchi Sea in the Arctic Ocean during the 7th Chinese Arctic Scientific Expedition in August 2016. Representative samples were collected to perform a mineralogical and geochemical analysis and elucidate their origin. Their mineral phases consist of todorokite, buserite, and birnessite, along with a small quantity of detrital minerals (quartz, feldspar, serpentine, kaolinite, and illite). Their elemental composition is rich in Ni and Mn compared to ferromanganese oxide deposits from other locations in the Chukchi Sea. The total rare earth element (REE) concentration varied from 138.95 to 207.23 μg/g with an average of 164.75 μg/g. The post-Archean Australian shale-normalized REE patterns have a slightly negative Ce anomaly and a positive Eu anomaly. The comprehensive geochemical and mineral data show that they have a mixed hydrothermal and diagenetic origin.

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Geological nvestigations in the Chukchi Sea and the adjacent areas of the Arctic Ocean during the RUSALCA-2009 expedition

Cited by 8 publications

References 5 publications

Possible conditions and the formation time of the Chukchi Plateau pockmarks

Possible conditions and the formation time of the Chukchi Plateau pockmarks

Specific chemical and mineral composition of ferromanganese nodules from the Chukchi Sea

Mineralogy and geochemistry of ferromanganese oxide deposits from the Chukchi Sea in the Arctic Ocean

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