Dissolution difference between limestones

There does appear to be some difference between limestones in the CaC03 dissolution rate. However, the most significant difference between stones is the rate of dissolution of MgC03. 

Dissolution rate of limestone in sulfuric acid is compared with that in sulfurous acid in Fig. 3 in which the rates are plotted against acid concentration [4], As seen in this figure, the dissolution rate of limestone is expressed by the mass transfer of sulfurous acid. The difference between sulfuric acid and sulfurous acid is mostly due to the stoichiometry as seen in Eqs. 1 and 2. Additionally, the rate in sulfuric acid is different from that in sulfurous acid in zone m, because the crystallization did not take place on the limestone surface in contrast to the limestone dissolution in... 

Follow-up test borings were completed for the final site characterization and implementation of a groundwater monitoring system. Based upon evaluation of the test boring data and the geophysical data, the site was found to be underlain by three different limestone members (20). The two contact zones which occur between the three members were associated with the two linear trending areas of variable conductivity. These zones were characterized by the development of deep karst zone that resulted from the dissolution of the lime-... 

We start with another set of isotope signatures. The rate of erosion in the distant past can be estimated by measuring the ratio of strontium isotopes in marine carbonates. Two stable isotopes of strontium — strontium-86 and strontium-87 — differ in their distribution between the Earth s crust and the mantle underneath it. The mantle is rich in strontium-86, whereas the crust is more richly endowed with strontium-87. The major source of strontium-86 in the oceans is the igneous rock basalt. This rock is extruded continuously from the mantle at the mid-ocean ridges, from where it spreads slowly across the ocean floor before diving back into the mantle beneath the ocean trenches. A little strontium dissolves from the basalt into seawater. The speed of dissolution is more or less constant. The gradual build-up of dissolved strontium-86 in the oceans is balanced by a steady uptake of strontium by marine carbonates, such as limestone (calcium carbonate). This is because strontium can displace its sister element, calcium, in the crystalline structure of limestone. As each of these processes takes place at a steady rate, we would not expect the relative amount of strontium-86 in limestone to fluctuate a great deal. In fact it varies quite a lot. Strontium-87 is to blame. 

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