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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Physical geography. ; Paleoecology. ; Evolution (Biology). ; Geochemistry. ; Earth System Sciences. ; Paleoecology. ; Evolutionary Biology. ; Geochemistry.
    Description / Table of Contents: Chapter 1-Introduction -- Chapter 2-Biogeochemical processes -- Chapter 3-Taphonomy and diagenesis of seeps -- Chapter 4-Biota -- Chapter 5-Seeps around the world -- Chapter 6-Seeps as ecosystems -- Chapter 7-Evolution of seep communities over geological time -- Chapter 8-Cognate communities.
    Abstract: This volume details the function of hydrocarbon seeps, their evolution over time, the most important seep occurrences and the fauna present in ancient hydrocarbon seeps. While several publications exist that cover modern seeps and vents, fossil seeps only constitute a small component of the literature. As such, many geologists, stratigraphers and paleontologists, as well as undergraduates and graduate students, are not very familiar with ancient hydrocarbon seep deposits and their associated fauna. This text is the first to comprehensively discuss the nature of such animal groups and how to recognize them. In addition to summarizing available knowledge on these topics for specialists in the field, this book offers the background needed to be of use to students as well as the wider community of geologists and paleontologists.
    Type of Medium: Online Resource
    Pages: XVII, 687 p. 129 illus., 71 illus. in color. , online resource.
    Edition: 1st ed. 2022.
    ISBN: 9783031056239
    Series Statement: Topics in Geobiology ; 53
    DDC: 550
    Language: English
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  • 2
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    PANGAEA
    In:  Supplement to: Cámara-Mor, Patricia; Masqué, Pere; García-Orellana, Jordi; Kern, Stefan; Cochran, J Kirk; Hanfland, Claudia (2011): Interception of atmospheric fluxes by Arctic sea ice: Evidence from cosmogenic 7Be. Journal of Geophysical Research: Oceans, 116, C12041, https://doi.org/10.1029/2010JC006847
    Publication Date: 2023-05-12
    Description: The natural cosmogenic radionuclide 7Be (T1/2 = 53.4 d) is supplied to the surface ocean from the atmosphere and, in the Arctic Ocean, can be used as a tracer of the efficiency with which sea ice intercepts the atmospheric fluxes of chemical species and of the importance of ice as a transport mechanism for particulate matter and chemical species. Analyses of 7Be in samples of surface water, surface sea ice, water beneath the ice, sea ice sediments, and precipitation from the Eurasian Basin of the Arctic Ocean show that the fraction of sea ice coverage determines the amount of 7Be in the surface water. When sea ice coverage is 〈40%, the 7Be inventory in the upper ocean (130 ± 19 Bq m**-2) is in good agreement with that expected from the inventory from 7Be atmospheric flux (128 ± 21 Bq m**-2). In contrast, when ice coverage is 〉80%, the water column inventory drops to 58 ± 20 Bq m**-2. The 7Be inventory in sea ice is 39 ± 23 Bq m**-2, and mass balance calculations show that sea ice can intercept 30 ± 18% of the atmospheric flux of 7Be during the studied period. We suggest that other atmospherically transported contaminants should be similarly intercepted. 7Be in the ice also can be used to estimate that the annual transport and release of sediment to the ablation area of the Fram Strait is -500 g m**-2, a value comparable to previously measured fluxes in sediment traps deployed in the area.
    Keywords: Arctic Ocean; ARK-XXII/2; CT; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Underway cruise track measurements
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 3
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; ARK-XXII/2; Beryllium-7; Beryllium-7, flux; Beryllium-7, flux, standard deviation; Beryllium-7, standard deviation; CT; DATE/TIME; Date/time end; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; LATITUDE; Latitude 2; LONGITUDE; Longitude 2; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Sample code/label; Sample volume; see further details; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 99 data points
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  • 4
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; ARK-XXII/2; Beryllium-7; Beryllium-7, standard deviation; CT; DATE/TIME; DEPTH, water; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; LATITUDE; LONGITUDE; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Sample ID; Sample volume; see further details; Station label; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 52 data points
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  • 5
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; ARK-XXII/2; Beryllium-7; Beryllium-7, standard deviation; CT; DATE/TIME; DEPTH, ice/snow; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; LATITUDE; LONGITUDE; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Sample ID; Sample volume; see further details; Station label; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 90 data points
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  • 6
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; ARK-XXII/2; Beryllium-7; Beryllium-7, standard deviation; CT; DATE/TIME; DEPTH, water; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; LATITUDE; LONGITUDE; Minimum detectable activity; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Sample ID; see further details; Station label; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 134 data points
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  • 7
    Publication Date: 2023-05-12
    Keywords: Arctic Ocean; ARK-XXII/2; Beryllium-7; Beryllium-7, standard deviation; CT; DATE/TIME; DEPTH, ice/snow; GEOTRACES; Global marine biogeochemical cycles of trace elements and their isotopes; LATITUDE; LONGITUDE; Polarstern; PS70/2-track; PS70 SPACE DAMOCLES; Sample ID; see further details; Underway cruise track measurements
    Type: Dataset
    Format: text/tab-separated-values, 48 data points
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  • 8
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    PANGAEA
    In:  Supplement to: Krishnaswami, Seth; Mangini, Augusto; Thomas, J H; Sharma, P; Cochran, J Kirk; Turekian, Karl K; Parker, P D (1982): 10Be and Th isotopes in manganese nodules and adjacent sediments: Nodule growth histories and nuclide behavior. Earth and Planetary Science Letters, 59(2), 217-234, https://doi.org/10.1016/0012-821X(82)90127-3
    Publication Date: 2023-08-28
    Description: The usefulness of cosmogenic beryllium-10 (half life = 2.5 Ma) for studying the rates of accumulation of ferromanganese nodules is reported based on its measured depth distribution in the top 20 mm of these deposits. Accumulation rates have been obtained in the range of 1 to 4 mm/Ma, which are in good agreement with rates determined using the 230Th method on the same nodules. The use of 10Be offers promise in extending the dating to the outer few cm of the nodules. This contrasts with conventional methods using 230Th and 231Pa isotopes which, due to their comparatively short half lives, are limited to a few mm at the surface of the nodules. Detailed studies of 10Be in the manganese deposits coupled with other trace element analyses should prove valuable in understanding the processes of formation of these deposits and the chronology of events recorded by them.
    Keywords: ARRH-TF; BC; Box corer; DOMES-A47-16; Dredge; DRG; Indian Ocean; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; RP8OC75; RP8OC75-47-16; Vit 5186; Vityaz (ex-Mars); Vityaz-35; VITYAZ5186
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
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    PANGAEA
    In:  Supplement to: Turekian, Karl K; Cochran, J Kirk; Krishnaswami, Seth; Lanford, W A; Parker, P D; Bauer, K A (1979): The measurement of 10Be in manganese nodules using a tandem Van De Graaff accelerator. Geophysical Research Letters, 6(5), 417-420, https://doi.org/10.1029/GL006i005p00417
    Publication Date: 2023-08-28
    Description: The growth rate of a manganese nodule from the South Atlantic Ocean (Rio Grande Ridge) has been determined using a 10Be profile as measured with a Tandem Van de Graaff accelerator. This rate is 4.5 mm /My. A correlation may exist between the 10Be flux and the Mn flux to nodules.
    Keywords: Atlantic Ocean; Beryllium-10; Beryllium-10/Beryllium-9, standard deviation; Beryllium-10/Beryllium-9 ratio; Beryllium-10 decay; Deposit type; DEPTH, sediment/rock; Description; DISTANCE; Distance, maximum; Distance, minimum; Dredge; DRG; Identification; Mass, netto; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; RC16; RC16-10RD; Robert Conrad
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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  • 10
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    PANGAEA
    In:  Supplement to: Krishnaswami, Seth; Cochran, J Kirk (1978): Uranium and thorium series nuclides in oriented ferromanganese nodules: growth rates, turnover times and nuclide behavior. Earth and Planetary Science Letters, 40(1), 45-62, https://doi.org/10.1016/0012-821X(78)90073-0
    Publication Date: 2023-08-28
    Description: Three ferromanganese nodules handpicked from the tops of 2500 cm**2 area box cores taken from the north equatorial Pacific have been analysed for their U-Th series nuclides. 230Thexc concentrations in the surface 1-2 mm of the top side of the nodules indicate growth rates of 1.8-4.6 mm/10**6 yr. In two of the nodules a significant discontinuity in the 230Th exc depth profile has been observed at ~0.3 m.y. ago, suggesting that the nodule growth has been episodic. The concentration profiles of 231Pa exc (measured via 227Th) yield growth rates similar to the 230Th exc data. The bottom sides of the nodules display exponential decrease of 230Th exc/232Th activity ratio with depth, yielding growth rates of 1.5-3.3 mm/10**6 yr. The 230Th exc and 231Pa exc concentrations in the outermost layer of the bottom face are significantly lower than in the outermost layer of the top face. Comparison of the extrapolated 230Thexc/232Th and 230Th exc/231Pa exc activity ratios for the top and bottom surfaces yields an "age" of (5-15) x 10**4 yr for the bottom relative to the top. This "age" most probably represents the time elapsed since the nodules have attained the present orientation. The 210Pb concentration in the surface ~0.1 mm of the top side is in large excess over its parent 226Ra. Elsewhere in the nodule, up to ~1 mm depth in both top and bottom sides, 210Pb is deficient relative to 226Ra, probably due to 222Rn loss. The absence of 210Pbexc below the outermost layer of the top face rules out the possibility of a sampling artifact as the cause of the observed exponentially decreasing 230Thexc and 231Paexc concentration profiles. The flux of 210Pbexc to the nodules ranges between 0.31 and 0.58 dpm/cm**2/yr. The exhalation rate of 222Rn, estimated from the 226Ra-210Pb disequilibrium is ~570 dpm/cm**2/yr from the top side and 〉2000 dpm/cm**2/yr from the bottom side. 226Ra is deficient in the top side relative to 230Th up to ~0.5-1 mm and is in large excess throughout the bottom. The data indicate a net gain of 226Ra into the nodule, corresponding to a flux of (24-46) x 10**-3 dpm/cm**2/yr. On a total area basis the gain of 226Ra into the nodules is 〈20% of the 226Ra escaping from the sediments. A similar gain of 228Ra into the bottom side of the nodules is reflected by the high 228Th/232Th activity ratios observed in the outermost layer in contact with sediments.
    Keywords: Alpha counting; BC; Box corer; Deposit type; DEPTH, sediment/rock; Description; DISTANCE; Distance, maximum; Distance, minimum; DOMES-A47-16; DOMES Site C, Pacific Ocean; Elevation of event; Event label; Insoluble residue; Latitude of event; Lead-210; Lead-210, standard deviation; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Oceanographer; Pacific Ocean; Radium-226; Radium-226, standard deviation; RP8OC75; RP-8-OC-75; RP8OC7503; RP8OC75-47-16; RP8OC75-57-58; Sample ID; Thorium-227; Thorium-227, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-232; Thorium-232, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 540 data points
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