CHARACTERISATION OF GRANITE ON THE BASIS OF FIELD RELATION IN, AROUND MANEKNATH TEMPLE (NEAR LOTOL VILLAGE), MAHESANA, BANASKANTHA DISTRICT, GUJARAT, INDIA

Here i share my dissertation work on CHARACTERISATION OF GRANITE ON THE BASIS OF FIELD RELATION IN, AROUND MANEKNATH TEMPLE (NEAR LOTOL VILLAGE), MAHESANA, BANASKANTHA DISTRICT, GUJARAT, INDIA.

1. DISSERTATION ON CHARACTERISATION OF GRANITE ON THE BASIS OF FIELD RELATION IN, AROUND MANEKNATH TEMPLE (NEAR LOTOL VILLAGE) , MAHESANA & BANASKANTHA DISTRICTS, GUJARAT, INDIA By DARSHAN R. DARJI UNIVERSITY SEAT NO : 859 UNDER THE GUIDANCE OF MRS. MADHUMAYEE MOHANTA MRS. NAYANI DAS GEOLOGIST, GEOLOGICAL SURVEY OF INDIA Year: 2022-2023 M. G. Science Institute (Geology Department) Ahmedabad, 380009

2. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI CONTENT Objective Location and Accessibility Google Earth Image of Study Area Geological Map of Area Geology of t he S tudy Area Lithostratigraphy of the Study Area Petrography Conclusion References 2

3. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI OBJECTIVE Characterisation of Granite on t he b asis of Field Relation in, around Maneknath Temple (near Lotol Village), Mahesana & Banaskantha Districts, Gujarat, India 3

4. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI LOCATION AND ACCESSIBILITY Toposheet No. 45D/16 of the Mahesana & Banaskantha Districts of Gujarat STUDY AREA 4

5. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI GOOGLE EARTH IMAGE OF STUDY AREA Map of Study Area around Maneknath Temple Region. (Source: Google Earth) 5

6. GEOLOGICAL MAP of the area M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI 6 Source: BHUKOSH(GSI)

7. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI GEOLOGY OF THE STUDY AREA Geological Age Supergroup Group Formation Lithology       Palaeo To Meso Proterozoic       Delhi Super-group   Sirohi Group Reodar Formation Mica- Schist ,Phyllite, Calctic Marble. Jiyapura Formation Biotite-schist, Migmatite.   Intrusive Sendra-Ambaji Granite And Gneiss Granite and Granite Gneiss. Phulad Ophiolite Suite Epidiorite, Hornblende Schist, Amphibolite, Gabbro Kumbhalgarh Group Todgarh Formation Marble, Biotite Schist, Quartzite Basantgarh Formation Calc Gneiss, Calc Schist, Marble, Calc Biotite Schist. Table source : Ahmad, T. and Tarney, J., 1994. Geochemistry and petrogenesis of late Archaean Aravalli volcanics, basement enclaves and granitoids, Rajasthan. Precambrian Research. 7

8. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI LITHOSTRATIGRAPHY OF THE STUDY AREA Aeolian sand/Soil cover Quartz vein Pegmatite veins Microgranite veins Potash-feldspar rich porphyritic granite Plagioclase rich porphyritic granite Calc silicate Rock (Delhi Supergroup) Sendra-Ambaji Granite 8

9. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI SENDRA - AMBAJI GRANITE Two variants of Sendra Ambaji granitoids : Plagioclase rich porphyritic granite K-feldspar rich porphyritic granite M edium to coarse grained. G rey to white/pinkish in colour. C omposed of quartz, orthoclase, plagioclase, biotite and amphibole. Feldspar phenocryst size : 1-5 cm 9

10. Plagioclase rich Porphyritic G ranite with M afic M icrogranular E nclaves (MME) having sharp contact with the host Granites, observed at Maneknath Cave Mafic Microgranular Enclaves (MME) Plagioclase rich porphyritic granite M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI 10 Scale: Geological Hammer (32cm)

11. K-feldspar rich Porphyritic Granite observed north of Dharoi Dam around Maneknath Temple & West of Lotol Village K- FELDSPAR rich porphyritic granite M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI Due to Alteration process Epidotisation observed i n K Feldspar rich Porphyritic Granite, Plagioclase Feldspar are c onverted i n t o Epidote 11 Scale: Geological Hammer (32cm) Scale: Coin (2.5cm)

12. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI PEGMATITE VEIN Pegmatite vein intruded into Microgranite rock observed at north Maneknath temple vekari village, The width of these Pegmatite vein is showing 32 cm. Showing the sharp contact of Pegmatite vein with Microgranite rock observed at north Maneknath temple vekari village, The width of these Pegmatite vein is showing 8 cm. 12 Scale: Geological Hammer (32cm)

13. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI PEGMATITE VEIN Garnet & Rose Q uartz rich pegmatite vein intruded into Calc-silicate rock & intergrowth of Quartz and Tourmaline has been observed at Koylapura village 13 Scale: Geological Hammer (32cm)

14. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI ALTERATION These hydrothermal alterations of the granite proceed mainly by a dissolution precipitation process resulting from the infiltration of hydrothermal fluid along microcracks A) silicified quartz veins observed in k-feldspar rich porphyritic granite B) due to alteration process infiltration of hydrothermal fluid along the microcracks in porphyritic granite A B 14 Scale: Coin (2.5cm) Scale: Geological Hammer (32cm)

15. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI A) B recciated zone developed due to the Hydrothermal activity and water effect B) Flourine vein in Potash-feldspar Granite & C ryptocrystalline silica, Chart, Alteration & Brecciated zone observed at west of Lotol village A B 15 Scale: Coin (2.5cm)

16. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI TAFONI WEATHERING Tafoni (singular: tafone) are small, concave, smooth-edged surfaces in a rock most often found in arid or semi-arid desert Very commonly observed in Study area 16 Scale: Geological Hammer (32cm)

17. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI 2 Set Parallel Joints Trending 280°N And 255°N 2 Set Conjugate Joints Trending 240°N And 320°N JOINTS STRUCTURE Joints are observed at west of Lotol village & near Maneknath cave 17

18. SKARN DEPOSITS Skarn deposits are developed due to Replacement, Alteration, and Contact Metasomatism of the surrounding country rocks by Hydrothermal solution adjacent to a Mafic, Ultramafic, Felsic, or Granitic intrusive body. They most often develop at the contact of intrusive plutons and Carbonate country rocks. This is found around study area. Diopside And Calcite M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI 18 Scale: Coin (2.5cm)

19. PETROGRAPHY M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI Carlsbad Twinning In K- Feldspar B. & C. Show Alteration In Porphyritic Granite (Silicification) A B C 19

20. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI CONCLUSION In the context of present study, an area was studied in parts of toposheet no. 45D/16 falls in the Mahesana, Banaskantha district, northern Gujarat The major litho-units observed in study area are K-Feldspar P orphyritic G ranite & P lagioclase rich Porphyritic G ranite P egmatite vein are intruded in to Microgranite and Calc-silicate rock are observed in study area This porphyritic, undeformed Granite is the youngest Granitic phase of Sendra Ambaji suite The last phase magmatic activity in the area is represented by Microgranite intrusion which is intruded by Pegmatite vein 20

21. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI Alteration like epidotisation, silicification, have been observed in investigated block. Intense epidotisation in K feldspar rich porphyritic Granite is observed at west of Lotol village, where in Epidote is associated throughout. Fluorite vein in P otash-feldspar Granite and Alteration zone (brecciated zone) is found along study area 21

22. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI REFRENCES Arindam Dutta, Shukla Dutta Gagan, Chandra Barik Specialized Thematic Mapping of The Delhi Supergroup of Rocks in Danta-Bhanpur Area of Banaskantha District of Gujarat September 2014, pg. 29 – 71 Prakash, I., Gupta, K. S., Dey, A., Singh, P. K., Dhoti, P., Basheer, H. S., ... & Modi, V. S. (2012). Geology and Mineral Resources of Gujarat, Daman and diu. Geological Society of India, Miscellaneous Publication, pg. 1-4 22

23. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI WEBSITES https://bhukosh.gsi.gov.in/Bhukosh/Public https://bhuvan.nrsc.gov.in/ www.wikipedia.com General Classification of Igneous Rocks (tulane.edu) https://earth.google.com/ 23

24. 24 M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI symposium Presented a paper on " CHARACTERISATION OF GRANITE ON THE BASIS OF FIELD RELATION IN AROUND MANEKNATH TEMPLE, MAHESANA, BANASKANTHA DISTRICT’S, GUJARAT, INDIA " at Geoyouth-2023, 11th All India Students Symposium on Geology organized by the Department of Geology, M. L. Sukhadia University, Udaipur during 25th-26th February,2023.

25. M.G. SCIENCE INSTITUTE (gEOLOGY Department) – DARSHAN DARJI Thank You 25