Comparison of morphology and formation mechanism of different types of chlorite.
|Types||Location||Optical characteristics||Formation mechanism|
|Grain-coating chlorite||Mainly on the surface of mineral particles||On the surface of mineral particles in a film of unequal thickness with poor crystal form||The material source is mainly from rivers and volcanic clastics during the syn-sedimentary process, such as biotite dissolution; rich in Fe and poor in Mg|
|Pore-lining chlorite||Mainly in intergranular pores and dissolved pores||In intergranular pores and dissolution pores in the form of leaves with good crystal form||The material source is mainly feldspar dissolution, rich in Mg|
|Rosette chlorite||Mainly on the surface of mineral and pore-lining chlorite||On the surface of minerals as agglomerates with good crystal form and high degree of self-shape||The material source is mainly provided by feldspar dissolution and mudstone compaction, with low Fe and Mg|