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  • 1
    Monograph available for loan
    Monograph available for loan
    New York : Routledge
    Call number: PIK P 120-06-0275
    Type of Medium: Monograph available for loan
    Pages: xiii, 341 S. , 21 cm
    Edition: 1st Routledge ed
    ISBN: 0415931029 , 0-415-93101-0
    Branch Library: PIK Library
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  • 2
    Monograph available for loan
    Monograph available for loan
    New York, NY : Routledge
    Call number: IASS 13.0086
    Type of Medium: Monograph available for loan
    Pages: 252 S.
    Edition: First edition
    ISBN: 9780415857826
    Branch Library: IASS Library
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  • 3
    Monograph available for loan
    Monograph available for loan
    London [u.a.] : Graham & Trotman
    Call number: M 548
    Type of Medium: Monograph available for loan
    Pages: viii, 211 S. : Ill., graph. Darst., Kt.
    Edition: 1st publ.
    ISBN: 0860108643
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 27 (1980), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: Thick turbidites accumulated along the northern margin of the Iapetus Ocean in Britain from mid-Ordovician to late Silurian times. Recent plate tectonic reconstructions hold that, during subduction, packets of these sediments, together with the underlying pelagic facies and thin portions of the uppermost ocean crust, were stripped from the descending plate and accreted to the inner trench wall on the Laurentian (North American) continental margin. The resulting accretionary prism is represented today by the Ordovician and Silurian rocks of the Southern Uplands of Scotland and the Longford-Down massif of Ireland. In these areas major reverse faults separate tracts of steeply dipping greywackes and mudstones with minor amounts of cherts and basalts. These tracts are up to several kilometres wide; their constituent beds face predominantly to the northwest, away from the site of the ancient ocean, while becoming progressively younger in each major fault slice towards the Iapetus suture in the southeast. From the stratigraphic sequences in these fault slices the sedimentary history of a portion of the Iapetus Ocean, and the British sector of its northern margin, can be reconstructed. In the Southern Uplands the earliest turbidites (mid- and late-Ordovician) are preserved in the northernmost fault slices. Regional facies trends, and vertical facies analysis, suggest that they accumulated in a trench dominated by a series of relatively small lower trench slope-derived fans. Pelagic sediments of the same age are found in the fault slices to the south, suggesting that the Ordovician turbidites were confined to the trench. During the lower and middle Llandovery, volcaniclastic trench turbidites were separated from quartz-rich ocean-floor turbidites (represented in the southern fault slices) by an elongate rise, on which pelagic deposits accumulated. This is interpreted as the outer trench high. In late Llandovery times the rise was overwhelmed, and thick laterally derived quartzose turbidites blanketed both the trench and the ocean floor. Sedimentation was strongly influenced by the evolution of the accretionary prism. By Llandovery times a trench slope break had emerged, supplying sediment both south to the trench and north to an upper slope basin in the Midland Valley of Scotland. In this basin early Silurian turbidites were followed by shallow-water and terrestrial sediments. Most of the sediment was derived from the emergent trench slope break: the volcanic arc and the Grampian orogenic belt to the north provided little or no detritus. Throughout the Ordovician and Silurian, sediment in the trench and on the ocean floor was derived from the volcanic arc, from the lower trench slope/trench slope break, from a degrading plutonic/metamorphic terrain (the Grampian Orogen), and locally by a minor amount of submarine sliding from carbonate-capped volcanic seamounts. Progressive elevation of the trench slope break in Silurian (and perhaps late Ordovician) times indicates that sediment from the arc-orogen hinterland must have bypassed the upper slope in the unexposed section of the margin to the northeast of the Southern Uplands, and travelled into the area axially along the trench floor.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2019-02-26
    Type: Dataset
    Format: text/tab-separated-values, 293 data points
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  • 6
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    Unknown
    PANGAEA
    In:  Supplement to: Leggett, Jeremy K (1982): Geochemistry of Cocos Plate pelagic-hemipelagic sediments in Hole 487, Deep Sea Drilling Project Leg 66. In: Watkins, JS; Casey Moore, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 66, 683-686, https://doi.org/10.2973/dsdp.proc.66.130.1982
    Publication Date: 2019-04-16
    Description: The sedimentary sequence recovered from Hole 487 documents northeast seafloor spreading on the Cocos Plate. A basal 65-meter unit of upper Miocene-Pliocene brown clay was deposited on the subsiding east flank of the East Pacific Rise. The overlying 105-meter unit of gray hemipelagic silt and mud was deposited when Site 487 drifted within reach of terrigenous sediment derived from the Mexican continental margin. Analyses of 21 elements in 45 samples, taken at regular intervals up Hole 487, give a geochemical profile which shows metal enrichment in basal sediment similar to that observed in previously recovered basal sediment sections in the Eastern Pacific (e.g., von der Borch & Rex, 1970; von der Borch et al., 1971). This verifies that the basalt cored at the base the hole is oceanic basement, since the first sediment to be deposited on newly formed ocean crust is characteristically enriched in metals, particularly Fe and Mn. The metals precipitate from circulating hydrothermal-exhalative solutions which are an integral part of active ridge volcanism (summary in Jenkyns, 1978). In this chapter I discuss the geochemistry of the basal metalliferous sediment from Hole 487. The geochemical data may also prove useful in studies of onshore volcanism: mass-balance calculations show that much (possibly all) of the incoming Cocos Plate sediment has been subducted since the Miocene (Watkins et al., this volume). It may have contributed to the genesis of magmas erupted in the Mexican volcanic arc
    Type: Dataset
    Format: text/tab-separated-values, 1024 data points
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  • 7
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lithology and age distribution of a seismic unit characterised by landward dipping reflectors suggest progressive underthrusting and uplift of trench deposits along the inner slope of the Middle America Trench. The fastest uplift and deformation rates, and the most rapid change in tilt of ...
    Type of Medium: Electronic Resource
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  • 8
    facet.materialart.
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    PANGAEA
    In:  Supplement to: Bachman, Steven B; Leggett, Jeremy K (1982): Petrology of Middle America Trench and trench slope sands, Guerrero Margin, Mexico. In: Watkins, JS; Casey Moore, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 66, 429-436, https://doi.org/10.2973/dsdp.proc.66.111.1982
    Publication Date: 2019-02-26
    Description: The sandstone petrology of Leg 66 samples provides insights into changes through time in the geology of the source regions along the Guerrero portion of the Middle America continental margin. This in turn constrains possible models of the evolution of the Middle America Trench (e.g., de Czerna, 1971; Malfait and Dinkleman, 1972; Karig, 1974). Primarily medium-grained sands and sandstones, representing the widest variety available of trench/trench slope settings and ages, were analyzed in both light and heavy mineral studies. Standard techniques were used as much as possible in order to compare results from other margins and from ancient rocks.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
    Publication Date: 2019-06-04
    Type: Dataset
    Format: text/tab-separated-values, 528 data points
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  • 10
    Publication Date: 2019-06-17
    Type: Dataset
    Format: text/tab-separated-values, 396 data points
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