Seawater Chemistry and Early Carbonate Biomineralization

  title={Seawater Chemistry and Early Carbonate Biomineralization},
  author={Susannah M. Porter},
  pages={1302 - 1302}
  • S. Porter
  • Published 1 June 2007
  • Geography, Environmental Science, Geology
  • 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… 

Seawater Chemistry, Biomineralization and the Fossil Record of Calcareous Organisms

  • P. Taylor
  • Geography, Environmental Science
  • 2008
Oscillations in seawater chemistry have characterized at least the last 600 million years of earth history. Three phases of aragonite seas have been separated by two of calcite seas, the former due

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.

Eve of biomineralization: Controls on skeletal mineralogy

Carbonate mineralogies have oscillated between aragonite and calcite seas through geological time, proposed to be due mainly to secular variation in the magnesium/calcium ratio driven by changing

Response of the Elemental Chemistry of Carbonate Phases to Secular Change in Ocean Chemistry.

  • F. Hasiuk
  • Geography, Environmental Science
  • 2008
Abstract Calcium carbonate is the dominant inorganic mineral precipitate of the global ocean and by no coincidence, it is also the most abundant mineral produced by life. Secular variation in the

The role of SO4 in the switch from calcite to aragonite seas

Throughout the Phanerozoic, the primary inorganic marine calcium carbonate mineralogy oscillated between calcite and aragonite, reflecting changes in seawater chemistry. These variations in seawater

Experimental investigation of calcium carbonate mineralogy in past and future oceans

  • P. Bots
  • Materials Science, Geology
  • 2011
Inorganic marine calcium carbonate formation and mineralogy varies significantly concurrent with the solution composition. During the Phanerozoic, due to oscillations in the seawater composition,

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 major

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 original

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 and



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 increased

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. The

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 shells

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 concentration

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 of

Aragonite production in calcite seas: effect of seawater Mg/Ca ratio on the calcification and growth of the calcareous alga Penicillus capitatus

  • J. Ries
  • Environmental Science, Geography
  • 2005
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 three

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.

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 a