Matches in SemOpenAlex for { <https://semopenalex.org/work/W2114446217> ?p ?o ?g. }
Showing items 1 to 100 of
100
with 100 items per page.
- W2114446217 endingPage "808" @default.
- W2114446217 startingPage "800" @default.
- W2114446217 abstract "ABSTRACT Dolomites from Upper Pleistocene sandstone and diatomaceous mud recovered from a coast-parallel, 4-km-wide trough on the Namibian shelf between Hottentot Bay and Spencer Bay have 87Sr/86Sr ratios between 0.70946 and 0.71309. Marine mollusc shells associated with the dolomites have a modern seawater Sr isotope ratio of 0.70915. The greater-than-seawater Sr ratios indicate unequivocally that groundwaters were involved in dolomite formation. Groundwaters, containing radiogenic Sr derived from weathering of Precambrian basement rocks, were focused into local troughs, mixed with seawater, and evaporated in the arid climate. The 13CPDB values of -4.0 to -2.4o/oo indicate uptake of bicarbonate derived in part from microbial degradation of organic matter, and 18OPDB values of 1.4 to 6.4o/oo suggest that the dolomite cement precipitated from a variably evaporated groundwater-seawater mixture. Dolomite cementation of the basal bioclastic sand and gravel occurred during emergence when sea level was below the trough sill depth of 65 m, most likely between 500 and 130 ka. Overlying calcareous and diatomaceous Eemian mud and sand are dolomitic only in the deepest, central trough area and contain 26 to 45 wt % disseminated dolomite. The 13CPDB values of -0.3 to -0.5o/oo and 18OPDB values of 5.7 to 6.4o/oo suggest that the disseminated dolomite formed from an evaporated groundwater-seawater mixture largely by replacement of biogenic carbonate when the shelf was subaerially exposed between 75 and 11 ka. Holocene transgressive shelly gravels and muddy sands contain only reworked Pleistocene dolomite, but Holocene dolomite may occur in coastal salt pans onshore." @default.
- W2114446217 created "2016-06-24" @default.
- W2114446217 creator A5065222515 @default.
- W2114446217 creator A5065785600 @default.
- W2114446217 creator A5068884420 @default.
- W2114446217 date "2001-09-01" @default.
- W2114446217 modified "2023-10-01" @default.
- W2114446217 title "Pleistocene Dolomite from the Namibian Shelf: High 87Sr/86Sr and 18O Values Indicate an Evaporative, Mixed-Water Origin" @default.
- W2114446217 cites W102867636 @default.
- W2114446217 cites W1490910720 @default.
- W2114446217 cites W1492351103 @default.
- W2114446217 cites W163475887 @default.
- W2114446217 cites W1982024129 @default.
- W2114446217 cites W1983143813 @default.
- W2114446217 cites W1984261277 @default.
- W2114446217 cites W1987130837 @default.
- W2114446217 cites W1988709242 @default.
- W2114446217 cites W1993898064 @default.
- W2114446217 cites W1999898881 @default.
- W2114446217 cites W2021862772 @default.
- W2114446217 cites W2038814532 @default.
- W2114446217 cites W2042229458 @default.
- W2114446217 cites W2051295811 @default.
- W2114446217 cites W2062219322 @default.
- W2114446217 cites W2071091649 @default.
- W2114446217 cites W2080602377 @default.
- W2114446217 cites W2089427819 @default.
- W2114446217 cites W2102703434 @default.
- W2114446217 cites W2117110569 @default.
- W2114446217 cites W2118660453 @default.
- W2114446217 cites W2124111514 @default.
- W2114446217 cites W2127408852 @default.
- W2114446217 cites W2139512662 @default.
- W2114446217 cites W2139819426 @default.
- W2114446217 cites W2159337285 @default.
- W2114446217 cites W2159510032 @default.
- W2114446217 cites W2167451751 @default.
- W2114446217 cites W2187020219 @default.
- W2114446217 cites W2256178763 @default.
- W2114446217 cites W2489231897 @default.
- W2114446217 cites W2924421792 @default.
- W2114446217 cites W1525893260 @default.
- W2114446217 cites W2519707511 @default.
- W2114446217 doi "https://doi.org/10.1306/2dc40969-0e47-11d7-8643000102c1865d" @default.
- W2114446217 hasPublicationYear "2001" @default.
- W2114446217 type Work @default.
- W2114446217 sameAs 2114446217 @default.
- W2114446217 citedByCount "19" @default.
- W2114446217 countsByYear W21144462172016 @default.
- W2114446217 countsByYear W21144462172017 @default.
- W2114446217 countsByYear W21144462172018 @default.
- W2114446217 countsByYear W21144462172019 @default.
- W2114446217 countsByYear W21144462172020 @default.
- W2114446217 countsByYear W21144462172022 @default.
- W2114446217 countsByYear W21144462172023 @default.
- W2114446217 crossrefType "journal-article" @default.
- W2114446217 hasAuthorship W2114446217A5065222515 @default.
- W2114446217 hasAuthorship W2114446217A5065785600 @default.
- W2114446217 hasAuthorship W2114446217A5068884420 @default.
- W2114446217 hasConcept C111368507 @default.
- W2114446217 hasConcept C121332964 @default.
- W2114446217 hasConcept C127313418 @default.
- W2114446217 hasConcept C151730666 @default.
- W2114446217 hasConcept C17409809 @default.
- W2114446217 hasConcept C22117777 @default.
- W2114446217 hasConcept C2780181037 @default.
- W2114446217 hasConcept C53570757 @default.
- W2114446217 hasConcept C62520636 @default.
- W2114446217 hasConcept C69384203 @default.
- W2114446217 hasConceptScore W2114446217C111368507 @default.
- W2114446217 hasConceptScore W2114446217C121332964 @default.
- W2114446217 hasConceptScore W2114446217C127313418 @default.
- W2114446217 hasConceptScore W2114446217C151730666 @default.
- W2114446217 hasConceptScore W2114446217C17409809 @default.
- W2114446217 hasConceptScore W2114446217C22117777 @default.
- W2114446217 hasConceptScore W2114446217C2780181037 @default.
- W2114446217 hasConceptScore W2114446217C53570757 @default.
- W2114446217 hasConceptScore W2114446217C62520636 @default.
- W2114446217 hasConceptScore W2114446217C69384203 @default.
- W2114446217 hasIssue "5" @default.
- W2114446217 hasLocation W21144462171 @default.
- W2114446217 hasOpenAccess W2114446217 @default.
- W2114446217 hasPrimaryLocation W21144462171 @default.
- W2114446217 hasRelatedWork W1233342656 @default.
- W2114446217 hasRelatedWork W1963974444 @default.
- W2114446217 hasRelatedWork W2138905419 @default.
- W2114446217 hasRelatedWork W2138931681 @default.
- W2114446217 hasRelatedWork W2141062021 @default.
- W2114446217 hasRelatedWork W2155773256 @default.
- W2114446217 hasRelatedWork W2587389442 @default.
- W2114446217 hasRelatedWork W3024591128 @default.
- W2114446217 hasRelatedWork W3136940746 @default.
- W2114446217 hasRelatedWork W1945399844 @default.
- W2114446217 hasVolume "71" @default.
- W2114446217 isParatext "false" @default.
- W2114446217 isRetracted "false" @default.
- W2114446217 magId "2114446217" @default.
- W2114446217 workType "article" @default.