Seawater Chemistry and Early Carbonate Biomineralization

  title={Seawater Chemistry and Early Carbonate Biomineralization},
  author={S. Porter},
  pages={1302 - 1302}
  • S. Porter
  • Published 2007
  • Chemistry, Medicine
  • Science
The first appearances of aragonite and calcite skeletons in 18 animal clades that independently evolved mineralization during the late Ediacaran through the Ordovician (~550 to 444 million years ago) correspond to intervals when seawater chemistry favored aragonite and calcite precipitation, respectively. Skeletal mineralogies rarely changed once skeletons evolved, despite subsequent changes in seawater chemistry. Thus, the selection of carbonate skeletal minerals appears to have been dictated… Expand
Seawater Chemistry, Biomineralization and the Fossil Record of Calcareous Organisms
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Calcite and aragonite seas and the de novo acquisition of carbonate skeletons.
The results suggest that calcite and aragonite seas do have a strong influence on carbonate skeletal mineralogy, however, this appears to be true only at the time mineralized skeletons first evolve. Expand
Eve of biomineralization: Controls on skeletal mineralogy
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Response of the Elemental Chemistry of Carbonate Phases to Secular Change in Ocean Chemistry.
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The role of SO4 in the switch from calcite to aragonite seas
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The long‐term impact of magnesium in seawater on foraminiferal mineralogy: Mechanism and consequences
Foraminifera are unicellular protists, primarily known for their calcium carbonate shells that provide an extensive fossil record. This record, ranging from Cambrian to present shows both majorExpand
Paleoecology of the earliest skeletal metazoan communities: Implications for early biomineralization
Observations support the view that skeletonization was promoted by the rise of substrate competitors and bilaterian predators, in predominately carbonate platform and reef environments. Expand
Experimental investigation of calcium carbonate mineralogy in past and future oceans
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Phanerozoic trends in skeletal mineralogy driven by mass extinctions
Changes in ocean chemistry that favoured the precipitation of aragonite or calcite are thought to have influenced the skeletal mineralogy of marine calcifyers. An investigation of the originalExpand
Demise of Ediacaran dolomitic seas marks widespread biomineralization on the Siberian Platform
The trigger for biomineralization of metazoans in the terminal Ediacaran, ca. 550 Ma, has been suggested to be the rise of oxygenation or an increase in seawater Ca concentration, but geochemical andExpand


Seawater chemistry and the advent of biocalcification
Major ion compositions of primary fluid inclusions from terminal Proterozoic (ca. 544 Ma) and Early Cambrian (ca. 515 Ma) marine halites indicate that seawater Ca{sup 2+} concentrations increasedExpand
Oscillations in Phanerozoic Seawater Chemistry: Evidence from Fluid Inclusions
Systematic changes in the chemistry of evaporated seawater contained in primary fluid inclusions in marine halites indicate that seawater chemistry has fluctuated during the Phanerozoic. TheExpand
Secular oscillations in the carbonate mineralogy of reef-building and sediment-producing organisms driven by tectonically forced shifts in seawater chemistry
The primary mineralogy of oolites and early marine carbonate cements led Sandberg [Nature 305 (1983), 19–22] to divide the Phanerozoic Eon into three intervals of `aragonite seas' and two intervalsExpand
Biomineralization and Evolutionary History
In this chapter, some major patterns of skeletal evolution inferred from phylogeny and fossils are outlined, highlighting ways that improving mechanistic knowledge of biomineralization can help us to understand this evolutionary record. Expand
An Overview of Biomineralization Processes and the Problem of the Vital Effect
“Biomineralization links soft organic tissues, which are compositionally akin to the atmosphere and oceans, with the hard materials of the solid Earth. It provides organisms with skeletons and shellsExpand
Composition of brines in halite-hosted fluid inclusions in the Upper Ordovician, Canning Basin, Western Australia: new data on seawater chemistry
Analyses of primary and early diagenetic fluid inclusions in the halite from the Late Ordovician Mallowa Salt, Canning Basin, Western Australia indicate a Ca-rich composition and high concentrationExpand
Influences of temperature and Mg:Ca ratio on CaCO3 precipitates from seawater
The Mg:Ca ratio at which the calcium carbonate mineral that has pseudohomogeneously precipitated from seawater changes from calcite to aragonite was experimentally determined as a function ofExpand
Early Cambrian seawater chemistry from fluid inclusions in halite from Siberian evaporites
Abstract Thirty nine samples of Lower Cambrian marine sedimentary halite with zoned primary fluid inclusions were analyzed using the UMCA method introduced by Petrichenko (1973) [Petrichenko, O.I.,Expand
An expanded record of Early Cambrian carbon cycling from the Anti-Atlas Margin, Morocco
We present a δ13C record from the Anti-Atlas mountains of Morocco and place it in the context of a detailed regional tectonostratigraphy. We place the litho- and chemostratigraphic record in aExpand
Aragonite production in calcite seas: effect of seawater Mg/Ca ratio on the calcification and growth of the calcareous alga Penicillus capitatus
Abstract Previous studies have shown that secular variation in the Mg/Ca ratio of seawater throughout the Phanerozoic would have subjected the aragonite-producing codiacean algae to at least threeExpand