The strontium isotopic composition and origin of burial cements in the Lincolnshire Limestone (Bajocian) of central Lincolnshire, England

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Authors:Emery, D.; Dickson, J. A. D.; Smalley, P. C.
Author Affiliations:Primary:
Univ. Cambridge, Dep. Earth Sci., Cambridge, United Kingdom
Volume Title:Sedimentology
Source:Sedimentology, 34(5), p.795-806. Publisher: Blackwell, Oxford-Boston, International. ISSN: 0037-0746
Publication Date:1987
Note:In English; illus., incl. 3 tables, sketch map
Summary:Strontium isotopic composition (87Sr/86Sr) of two petrographically, chemically and isotopically (delta 18O and delta 13C) distinct phases of burial calcites from the Lincolnshire Limestone are indistinguishable (0.70820 + or - 26). The mean 87Sr/86Sr ratio of these phases is considerably more radiogenic than 87Sr/86Sr ratios of Bajocian marine waters (approx 0.70725). Neither Bajocian marine waters nor meteoric waters buffered by host marine carbonate in the limestone could have precipitated the burial spars. Radiogenic Sr may have been contributed from K-feldspar dissolution and/or clay recrystallization, either within clastic portions of the limestone itself, or from major clastic units adjacent to the limestone. Alternatively, Palaeozoic marine waters or remobilized Palaeozoic marine carbonate and or sulphate could have supplied the necessary radiogenic Sr. (Authors' abstract) [A.W.H.]
Subjects:Alkaline earth metals; Bajocian; Carbonate rocks; Cement; Clastic rocks; Clay minerals; Isotope ratios; Isotopes; Jurassic; Limestone; Lincolnshire Limestone; Marl; Mesozoic; Metals; Middle Jurassic; Sedimentary rocks; Sheet silicates; Silicates; Sr-87/Sr-86; Stable isotopes; Strontium; England; Europe; Great Britain; Lincolnshire England; London Basin; United Kingdom; Western Europe
Abstract Numbers:88M/2298
Record ID:1996079245
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from PASCAL, Institute de l'Information Scientifique et Technique
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