Przykłady haematite

• This study concentrates on the latter which contain abundant chlorite-rich layers, commonly rich in magnetite and haematite grains.

• 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 nodules are dispersed throughout a clay and haematite-rich matrix.

• In addition, haematite is commonly present, to locally abundant.

• The calcination of haematite from a lower to a higher temperature could be used to monitor the water content in the lattice.

• These observations indicate that the dolomite and haematite were not precipitated as two coeval minerals.

• The fact that multiple phases of dolomite contain haematite crystals and are red further indicates that the reddening was a subsequent event to dolomitization.

• The pink colour is the product of haematite staining of the crinoid ossicles prior to growth of the syntaxial cement.

• The magnetization in the veins, schist and sandstones is interpreted to have been acquired when the haematite was precipitated.

• This is supported by petrographic studies of these samples that revealed skeletal magnetite with borders altered to haematite.

• Where the schist is reddened around the dolomite veins, the reddened portions similarly contain an intermixture of dolomite and haematite.

• These haematite-rich 'berries ' weather out of the rock and are strewn across the surface.

• This is supported by the presence of authigenic haematite.