By J.W. Morse, F.T. Mackenzie
This ebook covers the extra uncomplicated features of carbonate minerals and their interplay with aqueous strategies; glossy marine carbonate formation and sediments; carbonate diagenesis (early marine, meteoric and burial); the worldwide cycle of carbon and human intervention; and the position of sedimentary carbonates as signs of balance and adjustments within the Earth's floor setting. the chosen topics are awarded with adequate history details to permit the non-specialist to appreciate the fundamental chemistry concerned. validated on sessions taught by means of the authors, and authorized through the scholars, this finished quantity will turn out itself to be a precious reference resource to scholars, researchers and pros within the fields of oceanography, geochemistry, petrology, environmental technological know-how and petroleum geology.
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Additional resources for Geochemistry of Sedimentary Carbonates
An important subgroup of the CaCO3 minerals is the magnesian calcites. They are common components of shallow water, marine sediments, where they are derived from the skeletons of organisms and by direct precipitation of marine cements. Their solubility is strongly influenced by their magnesium content. In seawater, biogenic magnesian calcite containing -11 mole % MgC03 may have about the same solubility as aragonite. The characteristics and complex properties of this variety of calcite are extensively discussed in Chapter 3.
The characteristics and complex properties of this variety of calcite are extensively discussed in Chapter 3. Dolomite Dolomite is one of the most abundant sedimentary carbonate minerals, yet after years of intense study its mode of formation remains controversial, and its properties under Earth surface conditions are less well known than for most other carbonate minerals. The primary reason for this seems to be that its formation is kinetically hindered by its complex and well-ordered structure.
This definition, while seemingly straightforward, contains potential pitfalls for the carbonate geochemist. First, it demands that to demonstrate a true solubility the same equilibrium ion activity or concentration product should be obtained from both initially supersaturated and undersaturated solutions. Second, it means that the composition of the material that precipitates from solution must be the same as that of the bulk solid. When the solution contains components other than those present in the bulk solid or in concentration ratios that will not reproduce the composition of the bulk solid, true equilibrium cannot be reached, because a solid of different composition may precipitate.