BORON ISOTOPIC GEOCHEMISTRY OF CARBONATES AND PORE WATERS, OCEAN DRILLING PROGRAM SITE 851
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dc.contributor.author | Spivack A.J. | |
dc.contributor.author | You C.F. | |
dc.date.accessioned | 2020-12-15T04:58:28Z | |
dc.date.available | 2020-12-15T04:58:28Z | |
dc.date.issued | 1997 | |
dc.identifier | https://elibrary.ru/item.asp?id=268930 | |
dc.identifier.citation | Earth and Planetary Science Letters, 1997, , 1, 113-122 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20828 | |
dc.description.abstract | We have determined the boron content and isotopic composition of bulk carbonates and associated pore waters from Ocean Drilling Program Site 851. The δ11B of the carbonates range from 23%% to as low as -5.5%%, greatly extending the range of reported carbonate δ11B values. In contrast, pore fluid isotopic compositions are relatively constant. Based on the correlation of δ11B and 1/B (r=0.99) we conclude that the bulk carbonate at this site is a mixture of a biogenic component (~7 ppm with δ11B of 23%%) and a recrystallized component (~2.5 ppm with δ11B of -5.5%%). The empirical `low pH' water-carbonate fractionation factor implied by the data is 0.959+/-0.003. A boron concentration minimum occurs in pore waters at a depth of approximately 200 m below the seafloor and this is interpreted as reflecting essentially quantitative uptake of B at this depth and the horizontal advection of pore fluids with water residence times below the minimum on the order of 3,600 years. | |
dc.subject | BORON | |
dc.subject | CARBONATES | |
dc.subject | PORE WATER | |
dc.subject | ODP SITE 851 | |
dc.subject | GEOCHEMISTRY | |
dc.title | BORON ISOTOPIC GEOCHEMISTRY OF CARBONATES AND PORE WATERS, OCEAN DRILLING PROGRAM SITE 851 | |
dc.type | Статья |
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