The document provides an overview of the Bundelkhand Craton located in central India. It discusses the main components that make up the craton, including enclave suites of supracrustal rocks within orthogneisses, Bundelkhand granite associated with quartz reefs and rare felsic volcanics, and mafic dyke swarms. It also describes the tectonic evolution of the craton and presence of shear zones. Significant features of the Bundelkhand Craton are that it is composed predominantly of felsic igneous rocks indicating collision-related magmatism around 2700 to 2500 million years ago and contains various economically important minerals.

1. A Seminar On
BUNDELKHAND CRATON
Jiwaji University, Gwalior
Under The Guidance By:- Submitted By:-
Dr. P.K.Jain Chinmay Kumar Pradhan
S.O.S Earth Science M.Sc. 1st Year

2. CONTENT
1.INTRODUCTION
2.MAIN COMPONENTS OF THE CRATON
SUPRACRUSTALS AND GNEISSES
BUNDELKHAND GRANITE AND QUARTZ REEFS
MAFIC DYKE SWARMS
3.TECTONIC EVOLUTION
4.SHEAR ZONES
5.SIGNIFICANCE
6.CONCLUSION
7.BIBLIOGRAPHY

3. INTRODUCTION
 CRATON: It is that part of the earths continental crust which has attained
stability and least affected by deformation during the later periods.
 There are five cratons in the Indian shield
 They are:
1.Dharwar craton
2.Baster craton
3.Singhbhum craton
4.Bundelkhand craton
5.Aravali craton

4. "
HISTORYOFBUNDELKHAND CRATON
Bundelkhand craton named for the fifteenth century
kingdom of Bundelkhand .it is a triangular region having
semi-circular sides and Bundelkhand craton is one of the
Archean craton in the Indian shield.

5.  Bundelkhand craton is exposed
over 26000 sq k.m and is bound by
the son normada lineament in the
south.it is separated from the
satpura mobile belt in the south
and aravali craton in the west by
the Proterozoic Vindhyan basin and
the northen part is overlain by the
indo-gangetic alluvium
 It located between lat. 240 30' N
and 260 30' N and long. 770 30'
E and 810 50'E
Geologicallocationof Bundelkhandcraton

6. MAIN COMPONENTSOFTHECRATON
Enclave suite of supracrustal rocks with in orthogneisses .
Bundelkhand granite associated with quartz reefs and rare
felsic volcanic.
Mafic dyke swarms.

7. Enclavesuiteofsupracrustalrockswithinorthogneisses
Two prominent east west
trending belts of enclaves are
noticed –
1.northern belt(karera to
kabrai)
2.southern belt(madaura to
baraitha)
3.otherlinear enclve are
noticed at near panna kalinjer
.these belts have regional
trend of E-W with northerly
dips.

8. Enclavesessentially consistof
1.Ultramafic rocks- 1.(peridotite + dunite +pyroxenite +gabbro )
2.Wide spread in southern belt
3. mg and cr rich gabbro are seen in northern belt.
2.Meta basic rock-
1.abundant in both belt
2.schistose metabasalt + amphibolites
3.BIF-
1.wide spread around Girar , Baraitha , Babina.
2.compositionally banded quartz-magnetite , banded
magnetite-grunerite

9. Continue….
Meta pelites:
1.consists of garnet, biotite, sillimanite.
2.occure as schists.
3.occure near Mauranipur.

10. A)Amphibolite and enclave with in TTG
b)Tabular pillow basalt
c)BIF
d)Contact between Amphibolite and BIF

11. GNEISSES
 Grey and pink banded to streaky gneisses occur as silvers , rafts
and narrow belts with in vast area of younger Bundelkhand granite .
 In the stomatic gneisses,biotite and hornbland bearing
granodiorites melanosomes occure as bandeds or rafts in
leucosomes.
 Gneisses are best exposed at south of babina and yield age of
2500-2550 ma.
 The oldest gneissic component ;kuraicha 3.29 Ga
 The youngest gnessic component ;panchwara 2.9 Ga

13. 1.BundelkhandGraniteassociatedwithQuartzReefs andrareFelsicvolcanic
1.Cover most of the cratonic
area.(Bundelkhand granite)
2.Batholithic nature.
3.There are four phases of granite-
(geochemical study)
(a) Horn blende granodiorite.
(b) Porphyritic biotite granite.
(c) Coarse porphyritic granite.
(d) leuco granite.

14. 1(A)RAREFelsicvolcanics
1.Rhyolite to rhyodacite in
composition.
2.Occurs as sills .
3.These rocks are associated
with the granites at many
places such as Mahoba,
Bansi and simra near
prithipur.
4.They occur as grey to pink,
fine to coarse grained and
porphyritic felsic rocks.

15. 1(B)QUARTZREEFS
1.It having general trend NE-SW.
2.It having dimension ,35-40 km
length and 50-60m width .
3.Associted with pyrite, specular
hematite, chlorite, chalcopyrite.
4.The sulphides in quartz veins
indicates extensive hydrothermal
activity in Bundelkhand granite .
5.it indicates end stage of granitic
plutonism.

16. MAFICDYKESWARMS
1.Having trend NW-SE
2.Three Generation of dyke last one is
related to deccan trap.
3.Dimension:Few tens of meter
lenghth and 50 mtr wide.
4.introduce both granite and quartz
reefs .
5.composition: Dolerite and Gabbros
6.Age: 180 Ma

17. TECTONICEVOLUTION
 Bundelkhand and Aravalli cratons were
traditionally regarded as interlinked, with the
Bearch granite of Aravalli craton being
considered as the equivalent of Bundelkhand
granite
 Geochemical and Geochronological similarities
have reinforced this comparison. The separation
of two cratons with the evolution of Hindoli and
Mahakoshal belts at the cratonic margin, was
followed by the evolution of Vindhyan basin.
 Bundelkhand craton witnessed N-S compression
induced deformation , metamorphism and
emplacement of TTG gneisses produced by the
partial melting of a garnet amphibolite parental
source at 3000-3300Ma. Widespread collision-
related arc magmatism represented by
Bundelkhand granite commenced probably at
2700Ma and culminated at 2500Ma.

18. SHEARZONESINBUNDELKHANDCRATON
The region is characterized by the presence of
dominantly
three types of shear zones: E-W, NE-SW and NW-SE.
The E-W trending, vertical shear zones constitute the
subject matter of the present study and the areas
where
these shear zones are exposed have been shown.
It may be noted that in addition to the E-W shear
zones
shown in this map, there are many such shears of
relatively
smaller extent that could not be shown because of the
scale of the map, however, were studied because of
their
typical features, e.g. Jhankri, Kuraicha, Roni, etc

19. Field photographs showing the typical occurrence of the vertical shear zones in the
Bundelkhand terrain. The rocks are mylonites. (a) Near Shivgarh, (b) At Dhaura,
(c) Near Koti, about 6 km SE of Babina, (d) North of Pura, about 5 km NW of
Sukumwa Dam.

20. SOME FACTS ABOUT
BUNDELKHAND CRATON
The Precambrian age Bundelkhand massif is composite body comprised
mainly of felsic igneous rocks. The Geochemistry of the massif shows calc –
alkaline to alkaline affinity and points to collision- related magmatism.
The pattern closely resembles that of continental margin sierra naveda-
type batholiths and the subduction – related Benghnema batholith
Indian plate have accreted from several micro-plates during Precambrians
time ,with consequent emplacement of collision –Bundelkhand craton has
formed .
The area mainly comprises tonalite –tronjemite-granodorite
(TTG)gneisses, amphibolites,banded iron formation, komatiitic
basalts,metaperidotite,calc-sillicatesrocks,corundum-bearing ,quartz-
sericite schists, fuchsite quartzite and giant quartz veins,mafic dykes and
some noritic instrusion

21. SIGNIFICANCE
The geochronological and geochemical studies on mafic dikes and intrusions
provide evidence on the extensional processes that occurred in the craton, as
a great bearing on the Paleoproterozoic evolution of the Bundelkhand craton.
By the study of Bundelkhand craton we found difference type of economical
mineral ex-
1.Diaspore –Lalitpur,Jhansi,Mohoba
2.Silica or glass sand-chitrokoot
3.clay-Chatarpur

22. CONCLUSION
Bundelkhand Craton is one of the Archean cratons in the Indian shield. It is exposed over
26,000 sq. km and is bound by the Son Narmada lineament in the south, the Great Boundary
Fault in the west, and probably the Lesser Himalaya in the north.
The eastern, western, and southern margins of the Bundelkhand craton are covered by the
Proterozoic Vindhyan Supergroup and the northern part is overlain by the Indo- Gangetic
alluvium.
The main components of the cratons are -
i. Enclave suite of supracrustal rocks within orthogneisses.
ii. Bundelkhand granite with associated quartz reefs and rare felsic volcanic.
iii.Mafic dyke swarms.
Three types of shear zones are noticed in Bundelkhand Craton
i. E-W shear zone
ii. NE-SW shear zone
iii. NW-SE shear zone

23. BIBLIOGRAPHY
Geology of India by M.Ramakrishnan and
R. Vaidyanathan
Crustal evolution of Bundelkhand craton
By Dr.Pradip kumar singh