Base-Metal Concentration in a Density-Stratified Evaporite Pan1
Published:January 01, 1977
P. Sonnenfeld, P. P. Hudec, A. Turek, J. A. Boon, 1977. "Base-Metal Concentration in a Density-Stratified Evaporite Pan", Reefs and Evaporites—Concepts and Depositional Models, James H. Fisher
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In a density-stratified lagoon, an algal mat flourishing in the photozone below the interface between surface waters and a hypersaline brine is being replaced by gypsum; waters beneath the photozone are anaerobic and deposit only organic oozes. Major- and trace-element concentrations in the brines increase with depth. Both gypsum and organic matter extract significant quantities of trace metals from the water. A layered, solar-heated brine is suggested as the mechanism for base-metal concentration in depositional environments of euxinic shale.
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Reefs and Evaporites—Concepts and Depositional Models
With the Michigan basin having long been recognized as a classic area for the study of evaporite deposits, most of the papers included in this volume were presented at a 1975 meeting focusing on the Michigan basin. Topics covered include: Depositional environments of pinnacle reefs in the northern shelf of the Michigan basin; Sedimentology and depositional environments of basin-center evaporites; depositional environment in southeastern Michagan; An evaporitic lithofacies continuum; and Reefs and evaporites—a summary.