It includes a discription of some of the Granites of Rajasthan. It also includes the distribution of granites in Rajasthan according to their ages.

1. GUIDED BY: PRESENTED BY:
PROF. HAREL THOMAS SHUBHRA VERMA
M. TECH 3RD SEM
REG. NO Y21251045
DR. HARISINGH GOUR VISHWAVIDYALAYA, (A CENTRAL UNIVERSITY), SAGAR
M.P.
A PRESENTATION ON GRANITES OF RAJASTHAN
DEPARTMENT OF APPLIED GEOLOGY

2. CONTENTS
• Introduction
• Granites of Rajasthan
• Major granites of Rajasthan
• Untala and Gingla granite
• Jahazpur granite
• Berach granite
• Jhiri Ahar River granite
• Ajitgarh granite
• Erinpura granite
• Degana granite
• Balda granite
• Conclusion
• References

3. INTRODUCTION
• Felsic plutonic igneous rock.
• Mineralogy
• Essential minerals : quartz and alkali feldspar
• Accessory minerals: biotite, muscovite, amphiboles,
zircon, magnetite, ilmenite, sphene, pyrite etc.
• Texture
• Equigranular and inequgranular.
• Origin
• Fractional crystallization of basalt
• Partial melting involving anatexis.

4. GRANITES OF RAJASTHAN

5. PALEOPROTEROZOIC ALWAR &AJMER GRANITE
AMET AND DARWAL GRANITE
AHAR RIVER GRANITE
1700-1500 Ma
1700-1900 Ma
2025+/- 10 Ma
NEO ARCHEAN JHIRI GRANITE
BERACH GRANITE
JAHAZPUR GRANITE
GINGLA GRANITE
2530+/- 25 Ma
2580+/-50 Ma
2600 Ma
2800-2600 Ma
MESO ARCHEAN UNTALA GRANITE 3000-2900 Ma
ERA NAME AGE

6. ERA NAME AGE
NEOPROTEROZOIC JALOR GRANITE
SIWANA GRANITE
TUSHAM GRANITE
MALANI GRANITE
BALDA GRANITE
DEGANA GRANITE
ERINPURA GRANITE
725 +/- 7 Ma
727 +/- 5 Ma
732 +/- 41 Ma
745+/- 5 Ma
795+/- 11 Ma
827+/- 8 Ma
890+/- 50 Ma
MESOPROTEROZOIC SENDRI AMBAJI GRANITE
PANIARAS and CHAPOLI GRANITE
SEOLI GRANITE
UDAIPURWATI GRANITE
BAIRAT GRANITE
AJITGARH GRANITE
JASRAPURA GRANITE
1100-850 Ma
1340 Ma
1470+/-90 Ma
1480+/-40 Ma
1650 Ma
1725+/-13 Ma
1850 Ma
MALANI
IGNEOUS
SUITE

7. MAJOR GRANITES OF
RAJASTHAN

8. UNTALA GRANITE AND GINGLA GRANITE
• Synkinematic granites related to orogenic phase of Bhilwara geological cycle.
• Composition
Essential: quartz, K- feldspar, plagioclase, biotite.
Accessory: chlorite, sericite, muscovite & epidote.
• Untala granite occurs as a lensoid body.
• Gingla granite shows migmatitic and granitic components.
• Texture
Both show hypidiomorphic, granular texture.

9. JAHAZPUR GRANITE
• Exposed at central part of Hindoli Jahazpur area.
• Contains xenoliths of amphiboles and biotite schist.
• Bulging recrystallization & core mantle structure of quartz and
feldspar grains indicates low temperature, shallow crustal
deformation.
• Geochemical character:
• Granite to granodiorite to marginally quartz monzonitic in
character.
• Silica content : 67-73%
• Enriched LILE & HFSE patterns implying contamination of
crustal material within the magma sourced from differentiated
continental magma

10. BERACH GRANITE
• Exposed along the course of Berach river.
• Late tectonic mesozonal emplacement into the adjoining meta pelitic rocks
of BGC.
• Correlated with Jahazpur granite.
• Represents the terminal stage of magmatic activity of Archean era.
• Two granitic phase:
• Older grey granite with low silica and high Ca content
• Younger pink granite with more high silica, low Ca and peraluminous
granite with U-Th mineralization.

11. JHIRI GRANITE
• Intrusive into rocks of meta volcano sedimentary sequence of basal Raiolo
group of Delhi Supergroup.
• Modal composition of the granitoid pluton plotted in QAP plot shows
variation from Syeno- granite to Quartz syenite.
• Peraluminous, magnesian, alkali calcic to alkali in character.
• A type granite with an affinity to the volcanic arc related granitoid.
• Granite is more evolved and have strong depletions for HREEs
• Texture:
• Porphyritic texture. Phenocryst is alkali in composition while groundmass
is both alkali and plagioclase.
• The groundmass shows myrmekitic intergrowth.

12. AHAR RIVER GRANITE
• Lies above the Debari Group as an intrusive into the dolomite of the Delwara
Group and conglomerate-phyllite of Debari Group.
• Petrography
• Composed of two distinct types:
• Grey granite :
• Plagioclase rich ( up to 72.32%).
• Shows tonalitic composition.
• Pink granite:
• Rich in potash feldspar.
• Shows granodioritic texture.
• Both granites are very coarse grained hypidiomorphic granular texture.
• The pink granite is seen to intrude the grey granite.

13. AJITGARH GRANITE
• An intrusive body emplaced in the core of Nayai syncline.
• Syn-kinematic with second phase of deformation.
• High abundance of silica, alkalies, HFSE & LILE.
• Low concentrations of MgO and CaO, high Fe/Mg & Ga/Al ratio.
• A type granite.
• Two phases:
• Alkali granite
• Leucocratic trondhjemitic granite.

14. ERINPURA GRANITE
• Represents late to post Delhi acid intrusive.
• Peraluminous S type granites.
• Erinpura granites also shows rapakivi texture.
• Emplacement of these granites was accompanied by injection of aplitic and
pegmatitic material as veins.
• Two phases of magmatism:
• Early phase granite is heterogenous in nature from fine to coarse grained.
• Later phase is pink granite and is biotite rich.

15. DEGANA GRANITE
• Emplaced along western fringe of Delhi Aravalli belt in Rajasthan.
• Hosts significant tungsten deposits, located in Nagaur district,
Rajasthan.
• It is a peraluminous granite emplaced at shallow crustal level.
• Enriched in volatile elements like F, Li, B and has high Rb/Sr ratio
indicating post magmatic alteration involving enriched K phases and
depleted Ca phases.
• High Rb/Sr ratio indicates fertility of DPG for W mineralization.
• It has high LREE concentration and low HREE concentration.

16. BALDA GRANITE
• Occurs along the western margin of the middle South Delhi Fold Belt.
• Occurs as elongated intrusive bodies in the Erinpura Granite.
• Wolframite mineralization is confined to quartz veins and greisenised pegmatites.
• Avg. modal composition of Balda Granite is :
Quartz- 37% K feldspar 23% Plagioclase 23%.
• Peraluminous granite with high silica, moderate to high alumina, higher potassic
and lower sodic with abundance of metasedimentary xenoliths indicating S type
granite.
• Balda granite may have a magmatic origin involving late stage crystallization of a
potash and fluorine rich granite.
• Rich in granitophile elements (Li, Rb, W, Sn) and poor in Sr, Ba and Zr.
• Pluton of this granite is highly differentiated in nature
• Produced by partial melting of pelitic meta sediments.

17. CONCLUSION
• The granites of Rajasthan are host rock for many minerals of economic importance.
• U-Th mineralisation:
Berach granite
• Tungsten:
Degana granite
Balda granite
Sewariya granite
Erinpura granite
• The granites of Rajasthan are also mined for commercial purposes like decorative
stone, polished tiles, slabs and monumental stone all over the world.

18. REFERENCES
• BOOKS:
• Ramakrishanan, N. & Vaidyanadhan, R. (2010): Geology of India, vol I, Geological Society Of India, pp- 261-
333.
• Geology and mineral Resources of Rajasthan, No 30 Part 12, 3rd revised edition, GSI.
• RESEARCH PAPERS:
• Gopalan, K. & Choudhary, A.(1984): The Crustal record in Rajasthan; Proc. Indian Acad. Sci. (Earth planet.
Sci. ); vol. 93, pp 337-342.
• Guha, D. & Garkhal, R. (1993): Early Proterozoic Aravalli Metasediments and their relation with the Ahar
River Granite around Udaipur, Rajasthan; Journal geology Society of India, vol. 42; pp.327-335.
• Mishra A., Chauhan A., Chaterjee D., (2019): Petrology, geochemistry and geochronology of Neoarchean A-
type granite from Alwar Basin, North Delhi Terrane, NW India; Geology Survey of India, Western Rajasthan.
• Dey B., Das K., Dasgupta N., Bose S, Hidaka H., Ghatak H., Zircon U-Pb(SHRIMP) ages of the Jahazpur
Granite and Mangalwar Gneiss from the Deoli- Jahazpur Sector, Rajasthan, NW India: A Preliminary
Reappraisal of Stratigraphic Correlation and Implications to Crustal Growth (2019); Springer.

19. • Saini S.N., Yadav G.S., Fahmi S., U-Th Mineralization in Berach Granite around Belwa,
Devtalai and Gudalia, Bhilwara, Rajasthan (2008), Exploration and Research for Atomic
Minerals.
• Srivastava K.P., Geochemical characterization of tungsten bearing granites from Rajasthan,
India (1997); Journal of Geochemical Exploration.
• Kaur P., Chaudhri N. (2012), Two stage, Extreme Albitization of A type Granites from
Rajasthan, NW India, Journel of Pertology, Vol. 53, Issue 5, pp 919-948.
• Wall D.H., Anette Regelous, Schulz B., Hahn G, Michel B & Sharma K K
(2021):Neoproterozoic geodynsmics in NW India- evidence from Erinpura Granites in
South Delhi Fold Belt, internation Geology Review.
• Singh K. S. & Singh S. Geochemistry and Tungsten Metallogeny of the Balda Granite,
Rajasthan, India (2001), Gondwana Research.
• Chander S. & Kumar S. (2020), Tungsten mineralization Neoproterozoic Degana
Peraluminous Granite around Rewat Hill, Rajasthan, NW India: Implications from sub-
surface data and geochemistry, Geological Survey of India.

20. THANK YOU