Examples of dolomite

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The dolomite at this locality is extremely hard and may be baked.
The dolomitized varieties do not demonstrate any dolomite + quartz reaction, thus suggesting only low-temperature, greenschist-facies metamorphic conditions.
The red colour of the dolomite is due to abundant haematite crystallites that grew in the dolomite crystal fabric.
Thus, dolomite vein formation and haematite precipitation were two distinct events, which likely record different conditions.
Rather, haematite precipitation postdated the dolomite and took advantage of the dolomite crystal fabric.
The surface minerals identified include gypsum, calcite, halite, aragonite and dolomite.
The axial ratios of deformed dolomite clasts are greatest immediately adjacent to the metadolerite with axial ratios of 30:1.
Diagenetic phases include nodules of iron and magnesium oxide and locally extensive vein-filling calcite and dolomite.
The age constraints on the dolomite are therefore important evidence in dating the mineralization.
This shows that dolomite precipitation overlapped with the brecciation process.
These observations indicate that the dolomite and haematite were not precipitated as two coeval minerals.
Small amounts of calcite and dolomite can appear sporadically in silica xenoliths, but are more common in calc-silicate xenoliths.
The carbonate minerals, calcite, dolomite and ankerite were precipitated, with stringers of marcasite and trace chalcopyrite.
In the molasse sample, dolomite is present while calcite is absent.
The main constituents are quartz and calcite, whereas plagioclases, clay minerals and dolomites are less abundant.
The sulphide phase involves the precipitation of both fine-grained and coarsely crystalline sulphides (chalcopyrite, sphalerite, galena, pyrite) with quartz, dolomite, calcite, malachite and pink baryte.

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