PETROLOGICAL AND PETROCHEMICAL STUDIES OF ULTRAMAFIC ROCKS IN AND AROUND AYYAMPALAIYAM AREA, METTUPALAIYAM ULTRAMAFIC COMPLEX, TAMILNADU WITH SPECIAL REFERENCE TO PGE MINERALIZATION
Authors/Creators
- 1. Centre for Remote Sensing, Bharathidasan University, Trichy, Tamilnadu
Description
This area has been named with reference to this nearest village and named as 'A' area for convenience to report writing and presentation. In this area 12.25 lkm traverses were taken along and across the strike and dip of the formation. Based on mineralogical variation 28 chip/groove samples were taken. The general trend of the formation is N 80° E to S 80° W with northernly dipping sub-vertically. Collected samples for numbered APM-1/12 to APM-25/12 (APM = Ayyampalaiyam). Also collected samples at different locations showing in geological traverse line & sample location map of Ayyamplaliyam area. Three detached talc tremolite actinolite bands are present with pinching and swelling nature from west to eastern directions. This area has been divided into three segments such as eastern, central and western. These talc tremolite actinolite bands are inter-banded with meta gabbros and cobanded with banded magnetite quartzite. The interbanded with gabbroic anorthosite / anorthositic gabbros in the western part. In eastern part, the meta-pyroxenite is co-banded with fuchsite quartzite and interbanded with meta-gabbros. The central segments is consists of only one talc tremolite actinolite schist band. This band strike length is 6 km over the width of 20-30m. The western segment is consist two meta talc tremolite-actinolite schist rock are exposed. These two meta ultramafic bands are traceable more than 2 km from east to west. The western ends of the talc tremolite bands are traceable in the north of Peddikuttai village.
Files
303.pdf
Additional details
References
- 1. Condie, K.C., Allen, P. and Narayana, B.L., (1982). Geochemistry of the archaean low to high grade transition in southern India: Contrib. Mineral. Petrol., Vol. 81, pp. 157-167. 2. DAHL, P.S., (1980). The thermal-compositional dependance of Fe+2 – Mg distribution between coexisting garnet and pyroxene. Application to geothermometry. Am. Min., Vol. 65, pp. 854-866. 3. Janardhan.A.S and Peucat.J.J, 1996, Geochronological frame work of southern India. The Archaean and Proterozoic terrain of southern India within east gondwana. Gondwana research group memoir no.3, pp.53-76. 4. Hammerstrom,J.M and Zen, E-An, 1986, Aluminum in hornblende: an ampirical egneous geobarometer, americal mineralogist, v.71,pp.1297-1313. 5. Palanisamy,V., 2002, Petrology and metamorphic evolution of harur – uttangari shear belt, Tamil Nadu, Unpublished. Ph.D. Thesis submitted to University of Mysore. 6. Peucat,J.J, Vidal,P., Bernard-Griffiths,J. and , Condie,K.C, 1989, Sr, Nd and Pb isotope systematics in the Archaean low to high-grade transition zone of Southern India: syn-accretion vs post – accretion granulites, Jour. Geol., v.97,pp.537 – 550. 7. Sinha, A.L., and Krishna Rao, A.V., 1979, Geological of parts of Manaparai Taluk, Tiruchinopoly district and Dindigal taluk, Madurai District, Tamil Nadu, Geol. Surv. India. Prog. Rept. F.S. 1977-78. 8. Srikantappa, C. and Hensen, B.J., 1992, Metamorphic conditions and characterization of fluids in the MM hill granulites, Karnataka, India, N.Jb. Mineral, Mh, H, v.11,pp.498-506. 9. K.T. Rajan, V.T. Muthu, K. Radhakrishnan, P. Sundarrajan, P. Suthanandam, 1991-92. Report on the geochemical surveys for Nickel-Copper-Platinoid mineralisation in Sathyamangalam Belt, Periyar and Coimbatore districts, Tamil Nadu. 10. T.A. Selvan, A.K. Basu, 1974-75. Ultramafic and associated anorthosites in Bhavanisagar Sirumugai Punjaipuliyampatti area, Coimbatore district, Tamil Nadu.