Distribution of Mica in India - Economic Geology |Geologypage

Distribution of Mica in India

World’s best quality mica comes from India and the workable deposits have been recorded mainly from Bihar, Andhra Pradesh and Rajasthan. The occurrences of less significance are noted from the states of Tamil Nadu, Karnataka, Kerala, West Bengal, Madhya Pradesh and Orissa.

The geological distribution is given in the table below:

Formation	Area	State	Geological Details
Precambrian, predominantly mica-schist besides calc-granulite and gneisses, hornblende-schist, micaceous quartzite and conglomerate.	Bihar Mica-belt. The potential areas are around Koderma, Domchanch, Giridh and Chakai. Isolated occurrences in Palamau, Ranchi, Dhanbad and Singbhum districts.	Bihar	The mica pegmatites are localized mainly in mica-schist and micaceous quartzite, and rarely in hornblende-schist.
Biotite schist and hornblende-schist interbanded with minor quartzite, feldspathic-schist etc.	Nellore mica-belt. The main deposits are at Kalichedu, Thalpur and Gudur in Nellore district.	Andhra Pradesh	Mica bearing pegmatites are most frequent (70%) in biotite-schist and other rocks.
Pre-Vindhyan metasediments intruded by granites of different ages.	Rajasthan mica belt	Rajasthan	The pegmatites carrying mica are commonly intrusive into steeply diping muscovite-biotite-schist, dolerite and calc-silicate rocks.
Archean gneisses	Nilgiri	Tamil Nadu	The pegmatites carrying mica are intrusive into Gneisses.
Charnockite and leptynite	Madugula	Tamil Nadu	Irregular pockets of phlogopite are formed at the contact of pegmatites with charnockite and leptynite. The deposits are not of much significance.
Peninsular gneissic complex	Mysore and Hassan district	Karnataka	The distribution of mica in pegmatites is very erratic.
Calc-gneisses, dunite and norite	Neyoor and Punaloor	Kerala	Phlogopite mica is concentrated at the contact  of  pegmatite with calc-gneisses and dunite.
Gneisses and Schist	Bankura and Purulia Districts	West Bengal	Not economically significanct.

                                                                    Refernces and further reading.        

                                                                Umeshwar Prasad ;Economic Geology

                                                      Bateman, Alan M. ;Economic Mineral Deposits