Sr/Ca and Mg/Ca ratios in polygenetic carbonate allochems from a Michigan marl lake
dc.contributor.author | Treese, Thomas N. | en_US |
dc.contributor.author | Owen, Robert M. | en_US |
dc.contributor.author | Wilkinson, Bruce H. | en_US |
dc.date.accessioned | 2006-04-07T18:09:04Z | |
dc.date.available | 2006-04-07T18:09:04Z | |
dc.date.issued | 1981-03 | en_US |
dc.identifier.citation | Treese, Thomas N., Owen, Robert M., Wilkinson, Bruce H. (1981/03)."Sr/Ca and Mg/Ca ratios in polygenetic carbonate allochems from a Michigan marl lake." Geochimica et Cosmochimica Acta 45(3): 439-445. <http://hdl.handle.net/2027.42/24453> | en_US |
dc.identifier.uri | http://www.sciencedirect.com/science/article/B6V66-48C8GG7-40/2/cbd98ff140698541fd5cfe989d3bc9d8 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/24453 | |
dc.description.abstract | Rapid accumulation of CaCO3 is occurring in Littlefield Lake, a marl lake located in central Michigan. The sediment, which is 95% CaCO3, primarily consists of eight different genetic groups of carbonate allochems. These include calcite muds, sands, algal oncoids and Chara encrustations, as well as the dominant aragonitic gastropods Valvota tricarinota. Gyraulus deflectus and Amnicola integra. and the dominant aragonitic pelecypod Sphaerium partumeium. Samples of each of these groups were analyzed for Ca, Sr and Mg. Molar Mg/Ca ratios are primarily controlled by allochem mineralogy, with calcitic forms having Mg/Ca ratios 5-10 times larger than aragonitic (shelled) forms. The Sr/Ca ratios are primarily controlled by biochemical fractionation, and are significantly lower than Sr/Ca ratios of inorganically precipitated aragonite from other settings. Partition coefficients were determined for both Sr and Mg for each carbonate allochem group and, based on comparisons with results reported by other workers, the partition coefficients determined here are generally considered `typical' or representative values for biogeneous freshwater carbonates. An analysis of variance of the data indicates that most genera and species of carbonate-secreting organisms in marl lakes have highly characteristic Sr/Ca and Mg/Ca ratios. These ratios can potentially serve as geochemical tracers in future investigations of lacustrine carbonate diagenesis. Both Sr and Mg are influenced by grain size and/or surface area, probably due to the presence of these elements in non-lattice-held (exchangeable) positions. | en_US |
dc.format.extent | 790679 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Elsevier | en_US |
dc.title | Sr/Ca and Mg/Ca ratios in polygenetic carbonate allochems from a Michigan marl lake | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Geology and Earth Sciences | en_US |
dc.subject.hlbsecondlevel | Chemistry | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Oceanography Program, Department of Atmospheric and Oceanic Science. The University of Michigan, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.contributor.affiliationum | Oceanography Program, Department of Atmospheric and Oceanic Science. The University of Michigan, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.contributor.affiliationum | Department of Geological Sciences. The University of Michigan, Ann Arbor, MI 48109, U.S.A. | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/24453/1/0000727.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1016/0016-7037(81)90252-0 | en_US |
dc.identifier.source | Geochimica et Cosmochimica Acta | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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