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LIST OF FIGURES
Figure 1.1: Location of the Study Area
6
Figure 1.2: Study Area shown in Google Earth
7
Figure 1.3: Location of Kimberlite fields, lamprorite and alkaline rocks in
India. Geological map (after GSI) and cratonic boundaries
(modified after Naqvi and Rogers, 1987). KLF-Krishna
lamproite fiels, RLF-Ramadugu lamproite field, NKFNarayanpet kimberlite field
11
Figure 1.4: Geological Map showing Narayanpet Kimberlite Field (NKF)
(after Rao et. al., 1998).
13
Figure 1.5: Geological Map showing Narayanpet Kimberlite Field (NKF)
(after Paton, et al., 2009).
14
Figure 1.6: Geological Map showing Narayanpet Kimberlite Field (NKF)
(after GSI, 2011).
17
Figure 1.7: New Kimberlite discoveries in Narayanpet Kimberlite Field
(NKF) (after Lynn, 2005)
18
Figure 2.1: Landsat 8 satellite image overlaid on the Study Area
27
Figure 2.2: ASTER satellite image overlaid on the Study Area
28
Figure 2.3: Landsat 8 Band Combination 1,4,5 (RGB) image
38
Figure 2.4: Landsat 8 Band Combination 2,4,7 (RGB) image
39
Figure 2.5: Landsat 8 Band Combination 7,4,1 (RGB) image
40
Figure 2.6: Landsat 8 Band Ratio 5/7 5/1, 5/4*3/4 (RGB) image
43
Figure 2.7: Landsat 8 PC 1, 2, 3 (RGB) Image
45
Figure 2.8: Landsat 8 PC 3,2,1 (RGB) Image
46
Figure 2.9: Landsat 8 MNF 5,4,3 (RGB) Image
48
Figure 2.10: Landsat 8 MNF 3,4,5 (RGB) Image
49
Figure 2.11: Landsat 8 MNF 3,2,4 (RGB) Image
50
Figure 2.12: Updated Lithology of the study area
51
Figure 2.13: Lineaments of the Study Area
54
Figure 2.14: Lineaments Overlaid on ASTER Satellite Image
55
Figure 2.15: Lineaments Overlaid on ASTER Satellite Image
56
Figure 2.16: ASTER DEM of the study area
60
Figure 2.17: ASTER DEM Hill-Shade Image
61
Figure 2.18: Drainage pattern of the study area
62
Figure 2.19: Drainage overlaid on the DEM
63
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Figure 2.20: Elevation contours of the study area
64
Figure 2.21: Drainage and water bodies overlaid on contours
65
Figure 2.22: Geomorphology of the study area
67
Figure 3.1: Total Magnetic Intensity (TMI) of the Study Area
74
Figure 3.2: Total Magnetic Intensity (TMI) contours of the Study Area 75
Figure 3.3: Reduced to Pole (RTP) of the study Area
78
Figure 3.4: First Vertical Derivative (Z Direction) Map of the study area 80
Figure 3.5: First Vertical Derivative Contour Map of the study area
81
Figure 3.6: 3D Perspective View of First Vertical Derivative
82
Figure 3.7: Horizontal Derivative (X Direction) Map of the Study Area
83
Figure 3.8: Horizontal Derivative (X Direction) Contour Map of the study
area
84
Figure 3.9: Horizontal Derivative (Y Direction) Map of the Study Area
85
Figure 3.10: Horizontal Derivative (Y Direction) Contour Map of the study
area
86
Figure 3.11: Analytical Signal Map of the study Area
88
Figure 3.12: Analytical Signal Contour Map of the study Area
89
Figure 3.13: Magnetic Lineaments overlaid on First Vertical Derivative
contours.
90
Figure 3.14: Derivation of values for Peter’s Half-slope method (after
Sheriff, 1978).
92
Figure 3.15: The Euler solution on the right represent the correct SI for a
magnetic pipe-like body (top) and a dyke (bottom) (after
Reid, et al., 1990).
95
Figure 3.16: The three components of energy spectrum for interpretation
(after Hildenbrand et al., 1993).
97
Figure 3.17: Radially averaged Power Spectrum Profile of AA1
99
Figure 3.18: Radially averaged Power Spectrum Profile of BB1.
99
Figure 3.19: Radially averaged Power Spectrum Profile of BB2.
100
Figure 3.20: Radially averaged Power Spectrum Profile of BB3.
100
Figure 3.21: Radially averaged Power Spectrum Profile of BB4.
101
Figure 3.22: Radially averaged Power Spectrum Profile of BB5.
101
Figure 3.23: Radially averaged Power Spectrum Profile of CC1.
102
Figure 3.24: Inferred Magnetic Interface along profile CC2.
102
Figure 3.25: Radially averaged Power Spectrum Profile of DD1.
103
Figure 3.26: Radially averaged Power Spectrum Profile of DD2.
103
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Figure 3.27: Inferred Magnetic Interface along profile EE1.
104
Figure 3.28: Radially averaged Power Spectrum Profile of FF1.
104
Figure 3.29: Radially averaged Power Spectrum Profile of FF2.
105
Figure 3.30: Radially averaged Power Spectrum Profile of FF3.
105
Figure 3.31: Inferred Magnetic Interface along profile GG1.
106
Figure 3.32: Radially averaged Power Spectrum Profile of GG2.
106
Figure 3.33: Radially averaged Power Spectrum Profile of GG3.
107
Figure 3.34: Inferred Magnetic Interface along profile HH1.
107
Figure 3.35: Radially averaged Power Spectrum Profile of HH2.
108
Figure 3.36: Radially averaged Power Spectrum Profile of HH3.
108
Figure 3.37: Radially averaged Power Spectrum Profile of II1.
109
Figure 3.38: Profile lines overlaid on Magnetic Lineaments and First
Vertical Derivative.
114
Figure 3.39: Inferred Magnetic Interface along profile AA1.
115
Figure 3.40: Inferred Magnetic Interface along profile BB1.
116
Figure 3.41: Inferred Magnetic Interface along profile BB2.
117
Figure 3.42: Inferred Magnetic Interface along profile BB3.
118
Figure 3.43: Inferred Magnetic Interface along profile BB4.
119
Figure 3.44: Inferred Magnetic Interface along profile BB5.
120
Figure 3.45: Inferred Magnetic Interface along profile CC1.
121
Figure 3.46: Inferred Magnetic Interface along profile CC2.
122
Figure 3.47: Inferred Magnetic Interface along profile DD1
123
Figure 3.48: Inferred Magnetic Interface along profile DD2
124
Figure 3.49: Inferred Magnetic Interface along profile EE1.
125
Figure 3.50: Inferred Magnetic Interface along profile FF1.
126
Figure 3.51: Inferred Magnetic Interface along profile FF2.
127
Figure 3.52: Inferred Magnetic Interface along profile FF3.
128
Figure 3.53: Inferred Magnetic Interface along profile GG1.
129
Figure 3.54: Inferred Magnetic Interface along profile GG2.
130
Figure 3.55: Inferred Magnetic Interface along profile GG3.
131
Figure 3.56: Inferred Magnetic Interface along profile HH1.
132
Figure 3.57: Inferred Magnetic Interface along profile HH2.
133
Figure 3.58: Inferred Magnetic Interface along profile HH3.
134
Figure 3.59: Inferred Magnetic Interface along profile II1.
135
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Figure 4.1: Gamma-ray spectrumshowing the position of the K, Th, U and
total count windows (after International Atomic Energy
Agency - IAEA, 2003)
138
Figure 4.2: Airborne Radiometric Potassium Anomalies of the Study Area
144
Figure 4.3:Airborne Radiometric Potassium Anomaly contour Map of the
Study Area
145
Figure 4.4: Airborne Radiometric Thorium Anomalies of the Study Area
146
Figure 4.5: Airborne Radiometric Thorium Anomaly contour Map of the
Study Area
147
Figure 4.6: Airborne Radiometric Uranium Anomalies of the Study Area
148
Figure 4.7: Airborne Radiometric Uranium Anomaly contour Map of the
Study Area
149
Figure 4.8: Airborne Total Radiometric Anomalies of the Study Area
150
Figure 4.9: Airborne Total Radiometric Anomaly contour Map of the Study
Area
151
Figure 5.1: (Top) Green Schist belt shown in 7,4,1 (RGB) FCC Landsat 8
satellite image high-lighted. (Bottom) GSI, (2011) identified
this as Dharwars
153
Figure 5.2: (Top) high-lighted with red black soils shown in 7,4,1 (RGB)
FCC Landsat 8 satellite image. (Bottom) Paton, et al., (2009)
identified this as Black Soil plains derived from Deccan Traps
and black hatched portion identified by Archean/ Proterozoic
Granitoids, where the shape of the same matching with
image.
154
Figure 5.3: (Left) black soils shown in 7,4,1 (RGB) FCC Landsat 8 satellite
image. (Right) Paton, et al., (2009) identified these soils are
derived from Deccan Traps
154
Figure 5.4: Possible pathways and secondary mineral phases formed
during supergene alteration of primary kimberlite minerals
(after Keeling, et al., 2005)
156
Figure 5.5: Schematic diagram showing the alteration of olivine,
pyroxene and Mica (Dawson, 1980)
156
Figure 5.6: (Left) Resampled Brucite (or MgOH) and (Right) Resampled
Dolomite (Mg Carbonate) spectra
157
Figure 5.7: (Left) Resampled Chlorite (Mica) and (Right) Resampled
Plhogopite (Mg Mica) spectra
157
Figure 5.8: Resampled Serpentine spectra
157
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Figure 5.9: Laboratory spectra of different types of kimberlites (after
Guha, et al., 2013)
159
Figure 5.10: ASTER convolved laboratory spectra of different types of
kimberlites (after Guha, et al., 2013)
159
Figure 5.11: Mg-Rich Soils derived from spectral end-member method 160
Figure 5.12: Soils derived from Granitic (Grey & Pink Granites,
Migmatites and Gneisses etc) rocks weathering
161
Figure 5.13: Lineaments on Satellite image north of Narayanpet Town 164
Figure 5.14: Top) Rose diagram showing WNW-ESE and NW-SE trend in
the east of Narayanpet (surface lineaments derived from
satellite images). Bottom) Rose diagram showing WNW-ESE
and E-W trend in the W and SW of Narayanpet (deep seated
Magnetic lineaments)
166
Figure 5.15: Lineaments derived from Magnetic First Vertical Derivative
of the Study Area
167
Figure 5.16: Lineaments derived from Magnetic First Vertical Derivative
and derived from Satellite (ASTER and LANDSAT 8) along with
known GSI Kimberlite locations of the Study Area.
168
Figure 5.17: Feature 1: Ring like structure (right image) identified
through n-Dimensional end member algorithm in red box, not
identifiable in PCA (left image) and VNIR RGB (middle image)
173
Figure 5.18: Feature 2: Ring like structure shown in drainage pattern
(left), topo sheet (middle) and in satellite image (right)
173
Figure 5.19: Feature 3 : Ring like structure shown in ASTER 6,4,2 PC
bands (below) near Narayanpet Town (NNW direction), not
shown in VNIR band combination (above)
174
Figure 5.20: Kimberlite pipe total magnetic field responses, showing a
range of possible magnetic signatures (after Power et al.,
2007).
176
Figure 5.21: Three basic types of kimberlite intrusions based on the
morphological characteristics (after Field and Scott Smith,
1999). PK: Pyroclastic Kimberlite, RVK: Resedimented
Volcaniclastic Kimberlite, VK: Volvaniclastic Kimberlite, HK:
Hypabyssal Kimberlite, TKB: Tuffisitic Kimberlite Breccia
(after Kjarsgaard, 2003)
178
Figure 5.22: Updated lithology overlaid on spectrametric Potassium
Anomalies
181
Figure 5.23: Updated lithology overlaid on spectrometric Thorium
Anomalies
182
Figure 5.24: Updated lithology overlaid on spectrometric Uranium
Anomalies
183
Figure 5.25: Updated lithology overlaid on Th/ K Ratio Image
184

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