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Arctic Ocean Sediments Processes Proxies and Paleoenvironment

Arctic Ocean Sediments  Processes  Proxies  and Paleoenvironment Book
Author : R. Stein
Publisher : Elsevier
Release : 2008-07-22
ISBN : 9780080558851
Language : En, Es, Fr & De

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Book Description :

Although it is generally accepted that the Arctic Ocean is a very sensitive and important region for changes in the global climate, this region is the last major physiographic province of the earth whose short-and long-term geological history is much less known in comparison to other ocean regions. This lack of knowledge is mainly caused by the major technological/logistic problems in reaching this harsh, ice-covered region with normal research vessels and in retrieving long and undisturbed sediment cores. During the the last about 20 years, however, several international and multidisciplinary ship expeditions, including the first scientific drilling on Lomonosov Ridge in 2004, a break-through in Arctic research, were carried out into the central Artic and its surrounding shelf seas. Results from these expeditions have greatly advanced our knowledge on Arctic Ocean paleoenvironments. Published syntheses about the knowledge on Arctic Ocean geology, on the other hand, are based on data available prior to 1990. A comprehensive compilation of data on Arctic Ocean paleoenvironment and its short-and long-term variability based on the huge amount of new data including the ACEX drilling data, has not been available yet. With this book, presenting (1) detailed information on glacio-marine sedimentary processes and geological proxies used for paleoenvironmental reconstructions, and (2) detailed geological data on modern environments, Quaternary variability on different time scales as well as the long-term climate history during Mesozoic-Tertiary times, this gap in knowledge will be filled. *Aimed at specialists and graduates *Presents background research, recent developments, and future trends *Written by a leading scholar and industry expert

Stratigraphy and Glacial marine Sediments of the Amerasian Basin Central Arctic Ocean

Stratigraphy and Glacial marine Sediments of the Amerasian Basin  Central Arctic Ocean Book
Author : David L. Clark, Rick R. Whitman, Kirk A. Morgan, Scudder D. Mackey
Publisher : Geological Society of America
Release : 1980-01-01
ISBN : 0813721814
Language : En, Es, Fr & De

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Book Description :

Download Stratigraphy and Glacial marine Sediments of the Amerasian Basin Central Arctic Ocean book written by David L. Clark, Rick R. Whitman, Kirk A. Morgan, Scudder D. Mackey, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Carbonate Cycles and Clay Mineralogy of Arctic Ocean Sediment Cores

Carbonate Cycles and Clay Mineralogy of Arctic Ocean Sediment Cores Book
Author : Dennis Arnold Darby
Publisher : Unknown
Release : 1971
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Carbonate Cycles and Clay Mineralogy of Arctic Ocean Sediment Cores book written by Dennis Arnold Darby, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Texture Mineralogy and Chemistry of Arctic Ocean Sediments

Texture  Mineralogy and Chemistry of Arctic Ocean Sediments Book
Author : Angi Satyanarayan Naidu,Ghanshyam Datt Sharma
Publisher : Unknown
Release : 1972
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Texture Mineralogy and Chemistry of Arctic Ocean Sediments book written by Angi Satyanarayan Naidu,Ghanshyam Datt Sharma, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Regional and Temporal Variations of Mineral Assemblages in Arctic Ocean Sediments as Climatic Indicator During Glacial interglacial Changes

Regional and Temporal Variations of Mineral Assemblages in Arctic Ocean Sediments as Climatic Indicator During Glacial interglacial Changes Book
Author : Christoph Vogt
Publisher : Unknown
Release : 1997
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Regional and Temporal Variations of Mineral Assemblages in Arctic Ocean Sediments as Climatic Indicator During Glacial interglacial Changes book written by Christoph Vogt, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Stratigraphy and Glacial marine Sediments of the Amerasian Basin Central Arctic Ocean

Stratigraphy and Glacial marine Sediments of the Amerasian Basin  Central Arctic Ocean Book
Author : Geological Society of America
Publisher : Unknown
Release : 1934
ISBN : 9780813721811
Language : En, Es, Fr & De

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Book Description :

Download Stratigraphy and Glacial marine Sediments of the Amerasian Basin Central Arctic Ocean book written by Geological Society of America, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Physical Stratigraphy of Pleistocene Sediments from the Central Arctic Ocean

Physical Stratigraphy of Pleistocene Sediments from the Central Arctic Ocean Book
Author : Scudder Draper Mackey
Publisher : Unknown
Release : 1977
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Physical Stratigraphy of Pleistocene Sediments from the Central Arctic Ocean book written by Scudder Draper Mackey, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Glacial Marine Sedimentation

Glacial Marine Sedimentation Book
Author : Bruce F. Molnia
Publisher : Springer Science & Business Media
Release : 2012-12-06
ISBN : 1461337933
Language : En, Es, Fr & De

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Book Description :

This volume of 18 papers describes the glacial-marine sedimentary environment in a variety of temporal and spatial settings. The volume's primary emphasis is the characteri zation of Quaternary glacial-marine sedimentation to show (1) the significant differences that exist between glacial marine environments in different geographic settings and (2) their resulting glacial-marine deposits and facies. Addi tionally, papers describing ancient glacial-marine environ ments are also presented to illustrate lithified analogs of the Quaternary deposits. With the Doctrine of Uniformitarianism in mind (the present is the key to the past), it is hoped that this volume will serve to expand the horizons of geologists working on the rock record, especially those whose primary criteria for recognition of ancient glacial-marine environments is the presence of dropstones in a finer-grained matrix. As the papers presented here show, diamictite is only one of many types of deposits that form in the glacial-marine sedimentary environment. Papers presented in this volume examine the Quaternary glacia1-marine sedimentary picture in subarctic Alaska, Antarctica, the Arctic Ocean, the Kane Basin, Baffin Island, the Puget-Fraser Lowland of Washington and British Columbia, and the North Atlantic Ocean. Ancient glacia1-marine depos its described are the Neogene Yakataga Formation of southern Alaska, the Late Paleozoic Dwyka Formation of the Karoo Basin of South Africa, and the Precambrian Mineral Fork Formation of Utah. For continuity, a paper summar1z1ng the temporal and spatial occurrences of glacial-marine deposits is also presented.

10Be records from sediments of the Arctic Ocean covering the past 350 ka

10Be records from sediments of the Arctic Ocean covering the past 350 ka Book
Author : A.A. ALDAHAN,S. NING,G. Possnert,J. BACKMAN,K. Bostrom
Publisher : Unknown
Release : 1997
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download 10Be records from sediments of the Arctic Ocean covering the past 350 ka book written by A.A. ALDAHAN,S. NING,G. Possnert,J. BACKMAN,K. Bostrom, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

The Organic Carbon Cycle in the Arctic Ocean

The Organic Carbon Cycle in the Arctic Ocean Book
Author : Rüdiger Stein,Robie W. Macdonald
Publisher : Springer Science & Business Media
Release : 2011-06-27
ISBN : 3642189121
Language : En, Es, Fr & De

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Book Description :

The flux, preservation, and accumulation of organic carbon in marine systems are controlled by various mechanisms including primary p- duction of the surface water, supply of terrigenous organic matter from the surrounding continents, biogeochemical processes in the water column and at the seafloor, and sedimentation rate. For the world's oceans, phytoplankton productivity is by far the largest organic carbon 9 source, estimated to be about 30 to 50 Gt (10 tonnes) per year (Berger et al. 1989; Hedges and Keil 1995). By comparison, rivers contribute -1 about 0. 15 to 0. 23 Gt y of particulate organi.

G

G  Book
Author : Kathleen Ann Gannon
Publisher : Unknown
Release : 2002
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

"Offshore oil development in Arctic Alaska is expanding. Since biodegradation is a major removal mechanism of petroleum hydrocarbons from the environment, baseline data on microorganisms present are important. I estimated microbial populations and their degradation activities in Arctic Ocean sediments, and examined how sediment affects phenanthrene bioavalability. Populations of hydrocarbon degraders were significantly higher in sediments from near Prudhoe Bay than near Barrow. However, microbial counts from Prudhoe Bay were similar to those measured in the 1970s suggesting that the difference was not due to oil development activities. Total microbial counts were higher than in more temperate regions. All sediments had low hexadecane and phenanthrene mineralization potentials. The apparent partition coefficient, Kp, for phenanthrene in sediment/seawater slurries generally increased with increasing sediment organic carbon. But without aging, sediment did not influence the mineralization of phenanthrene. Overall, biodegradation will likely be a slow removal mechanism of contaminants from the Arctic marine environment"--Leaf iii.

Natural Gas Hydrate Arctic Ocean Deepwater Resource Potential

Natural Gas Hydrate   Arctic Ocean Deepwater Resource Potential Book
Author : Michael D. Max,Arthur H. Johnson,William P. Dillon
Publisher : Springer Science & Business Media
Release : 2013-10-11
ISBN : 3319025082
Language : En, Es, Fr & De

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Book Description :

The book is an up-to-date basic reference for natural gas hydrate (NGH) in the Arctic Ocean. Geographical, geological, environmental, energy, new technology, and regulatory matters are discussed. The book should be of interest to general readers and scientists and students as well as industry and government agencies concerned with energy and ocean management. NGH is a solid crystalline material that compresses gas by about a factor of about 164 during crystallization from natural gas (mainly methane) - rich pore waters over time. NGH displaces water and may form large concentrations in sediment pore space. Its formation introduces changes in the geotechnical character of host sediment that allows it to be distinguished by seismic and electric exploration methods. The chemical reaction that forms NGH from gas and water molecules is highly reversible, which allows controlled conversion of the NGH to its constituent gas and water. This can be achieved rapidly by one of a number of processes including heating, depressurization, inhibitor injection, dissolution, and molecular replacement. The produced gas has the potential to make NGH a valuable unconventional natural gas resource, and perhaps the largest on earth. Estimates for NGH distribution, concentration, economic targets, and volumes in the Arctic Ocean have been carried out by restricting the economic target to deepwater turbidite sands, which are also sediment hosts for more deeply buried conventional hydrocarbon deposits. Resource base estimates are based on NGH petroleum system analysis approach using industry-standard parameters along with analogs from three relatively well known examples (Nankai-Japan, Gulf of Mexico-United States, and Arctic permafrost hydrate). Drilling data has substantiated new geotechnical-level seismic analysis techniques for estimating not just the presence of NGH but prospect volumes. In addition to a volumetric estimate for NGH having economic potential, a sedimentary depositional model is proposed to aid exploration in the five different regions around the deep central Arctic Ocean basin. Related topics are also discussed. Transport and logistics for NGH may also be applicable for stranded conventional gas and oil deposits. Arising from a discussion of new technology and methodologies that could be applied to developing NGH, suggestions are made for the lowering of exploration and capital expenses that could make NGH competitive on a produced cost basis. The basis for the extraordinarily low environmental risk for exploration and production of NGH is discussed, especially with respect to the environmentally fragile Arctic region. It is suggested that because of the low environmental risk, special regulations could be written that would provide a framework for very low cost and safe development.

Sea Ice and Iceberg Sedimentation in the Ocean

Sea Ice and Iceberg Sedimentation in the Ocean Book
Author : Alexander P. Lisitzin
Publisher : Springer Science & Business Media
Release : 2002-10-02
ISBN : 9783540679653
Language : En, Es, Fr & De

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Book Description :

This reference book for researchers working on glacial sediments provides a complete overview of the various glacial deposits in the ocean. It presents a collection of worldwide data on glacio-marine phenomena.

Pliocene and Pleistocene Foraminifera Populations in Arctic Ocean Sediment Cores

Pliocene and Pleistocene Foraminifera Populations in Arctic Ocean Sediment Cores Book
Author : John A. Larson
Publisher : Unknown
Release : 1973
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The Foraminifera populations and distributions of five deep sea sediment cores recovered from the Arctic Ocean yielded data on 126 species of Foraminifera. Abundance data and species appearance and mortality data across geomagnetic reversal intervals in the cores show no positive correlation. Arctic Ocean Foraminifera apparently do not respond in any significant way to magnetic reversals of the earth's magnetic field. (Modified author abstract).

Distribution of Benthic Foraminifers 125 Um in the Surface Sediments of the Arctic Ocean

Distribution of Benthic Foraminifers   125 Um  in the Surface Sediments of the Arctic Ocean Book
Author : Lisa E. Osterman,Richard Z. Poore,Kevin M. Foley,Geological Survey (U.S.)
Publisher : Unknown
Release : 1999
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Distribution of Benthic Foraminifers 125 Um in the Surface Sediments of the Arctic Ocean book written by Lisa E. Osterman,Richard Z. Poore,Kevin M. Foley,Geological Survey (U.S.), available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Deep sea Sediments

Deep sea Sediments Book
Author : Heiko Hüneke,Thierry Mulder
Publisher : Elsevier
Release : 2011
ISBN : 0444530002
Language : En, Es, Fr & De

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Book Description :

'Deep-Sea Sediments' focuses on the sedimentary processes operating within the various modern and ancient deep-sea environments. The chapters track the way of sedimentary particles from continental erosion or production in the marine realm, to transport into the deep sea, to final deposition on the sea floor.

Recent Marine Sediments and Submarine Topography Sverdrup Islands Canadian Arctic Archipelago

Recent Marine Sediments and Submarine Topography  Sverdrup Islands  Canadian Arctic Archipelago Book
Author : David R. Horn
Publisher : Unknown
Release : 1967
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Submarine topographic features of the channels, sounds, fiords, and bays can best be explained as the products of extensive glacial excavation of a pre-existing drainage system. Troughs, hanging troughs, strings of deeps or basins, terminal sills, linear rises and depressions, and oversteepened deltas are considered direct or indirect evidence of glacial scour. Following glaciation, a negative movement of the Sverdrup Basin was accompanied by flooding of the northern part of the Archipelago. Only the upper portions of former interfluvial areas remained above sea level. These topographic highs are the present-day islands of the Canadian Arctic Archipelago. Statistical analyses of beach, fluvial, deltaic, and offshore marine sediments reveal characteristics that may be unique to polar deserts and ice-covered seas. Textures of beach and fluvial sediments are a function of associated relief and parent material. The deltaic environment is defined as that portion of the sea floor extending from the mouth of a river to approximately 3,200 feet from shore. Deltaic sediments show a progressive decrease in grain size seaward. Size distribution is related to the settling velocities of particles of different diameters. Offshore sediments have uniform textural properties. They are a combination of silt and clay (settled from suspension), and a minor but significant portion of sand- to granule-sized sediment (ice-rafted). An increase in mean grain size on the crests of submarine topographic highs suggests that winnowing by currents is taking place over these features. Two large areas of the sea floor lack a cover of Recent sediment. Organic carbon constitutes 0.84 to 2.14% of the offshore sediments. A dual source, terrigenous and phytoplanktonic, may explain the relatively high percentage of organic carbon. There is a positive correlation between percent organic carbon and amount of clay in the samples. Results of semiquantitative clay-mineral analyses of source rock, fluvial, deltaic, and offshore marine sediments indicate that montmorillonite, kaolinite, and illite are the dominant clay minerals. In this northern region, there is no change in clay mineralogy during weathering and transport. It is suggested that this may be characteristic of weathering under polar desert conditions. The mineralogy of parent materials on the islands controls the clay mineral distribution in offshore areas. In Louise Fiord, well-crystallized kaolinite is differentially flocculated close to shore. A study of the roundness of quartz grains of sand, silt, and clay size reveals that the distribution of this property is bimodal. Coarse and medium sands are well rounded, fine sands through coarse silts are angular, and fine silt and clay-sized particles are well rounded. High roundness of grains in the medium to coarse sand grades is attributed to abrasion. Well rounded quartz in the silt-clay size range is considered to be a product of solution.

Strontium Isotopic Composition in Arctic Pleistocene and Pliocene Marine Sediments

Strontium Isotopic Composition in Arctic Pleistocene and Pliocene Marine Sediments Book
Author : Scott Lehman,Woods hole oceanographic institution ma Dept. of geology and geophysics
Publisher : Unknown
Release : 1997
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The primary goal of the research was to use 87Sr/86Sr as a geochronometer in Arctic Ocean sediments. This attempt was unsuccessful because the analytical precision of the analysis (+/-0.000010) was insufficient to differentiate the expected change in oceanic 87Sr/86Sr. New data published after the submission of this proposal indicated that the change was on 0.000025, half that of previously published data. However, a study of the strontium isotopic composition of foraminifera from the Arctic implied that there is enrichment of radiogenic strontium in the Arctic halocline. Although the mean values are statistically different in the Arctic Ocean and the South Atlantic, contamination by clay minerals in the Arctic cannot be ruled out. A simple box model indicates that some enrichment of strontium in surface waters must occur, but the amount is very sensitive to the strontium isotopic composition of Arctic rivers. Models using the most recent riverine data do not produce the observed enrichment.

Sea Ice in the Arctic

Sea Ice in the Arctic Book
Author : Ola M. Johannessen,Leonid P. Bobylev,Elena V. Shalina,Stein Sandven
Publisher : Springer Nature
Release : 2019-11-12
ISBN : 3030213013
Language : En, Es, Fr & De

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Book Description :

This book provides in-depth information about the sea ice in the Arctic at scales from paleoenvironmental variability to more contemporary changes during the past and present centuries. The book is based on several decades of research related to sea ice in the Arctic and its variability, sea ice process studies as well as implications of the sea ice variability on human activities. The chapters provide an extensive overview of the research results related to sea ice in the Arctic at paleo-scales to more resent scales of variations as well as projections for changes during the 21st century. The authors have pioneered the satellite remote sensing monitoring of sea ice and used other monitoring data in order to study, monitor and model sea ice and its processes.