Table 2
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 |