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Fig.16 Fig.17 Boudins of gneisses. reservoir. amphibolite Location SE in of migmatitic Malampuzha Filling of neosoma t ic material along the tensional cracks developed in amphibolite .
Page 1 and 2: GEOLOGY, METAMORPHISM AND TECTONIC
Page 3: Acknowledgement Abstract Chapter I
Page 6: Field investigations indicate that
Page 9 and 10: mineralogy of K-feldspar (46 modal
Page 12 and 13: granulite terrains. Enrichment of a
Page 14: Amphiboles of both the calc granuli
Page 19 and 20: through syn to post-thickening magm
Page 21 and 22: CHAPTER I INTRODUCTION Palghat Gap
Page 23 and 24: Fig.2(a) A view of a part of the Pa
Page 25: Narayanaswamy,1954), paucity of myl
Page 28: of movement. Aeromagnetic data of R
Page 34: Bounded by the Western Ghats, the K
Page 39 and 40: Fig.5 Coarsening of sillimanite in
Page 43: and a proven vertical extent of mor
Page 47 and 48: F1g.12 Hornblende - biotite gneiss
Page 49: of 0.75 m, along NE-SW trending fra
Page 56 and 57: closures of an earlier generation (
Page 58 and 59: symmetrical folds (Fig. 24) • In
Page 60: Fig.25 Boudins of amphibolite folde
Page 66 and 67: Fig . 31 Cross - folding of open me
Page 68 and 69: CHAPTER I I I PETROGRAPHY Petrograp
Page 71 and 72: Fig.32 Fig.33 Fig.34 Fig.35
Page 74: Fig.36 Fig.37 Fig.38 Fig.39
Page 78 and 79: Fig. 40 Fig. 41 Fig. 42 Fig. 43 & 4
Page 80 and 81: Fig. 45 Fig. 46 Fig. 47 BEl of cord
Page 82 and 83: quartzofeidspathic augens. Kinked a
Page 84 and 85: Fig. 48 Fig. 49 Fig. 50 Fig. 51 Rea
Page 88: clinopyroxene, possibly suggesting
Page 91: Labradoritel as indicated by mlcrop
Page 94: Fig . 56 Fig . 57 Fig.58 Fig.59
Page 98 and 99: Fig. 60 Quartz grain completely sur
Page 101:
grains are inequigranuiar with cren
Page 104 and 105:
Fig.64 F1 g.65 F1g.66 • O· 'l "'
Page 108 and 109:
Fig. 68 Coarse biotite flakes trans
Page 110:
111.5 AMPHIBOLITES These are medium
Page 113 and 114:
Fig.72 Fig. 73 Fig.74 Fig.75
Page 115 and 116:
appear to corrode amphiboles. Alter
Page 117:
Fig. 76 Fig. 77 Fig. 78 Fig. 79 Per
Page 120 and 121:
Fig. 80 Fig. 81 Fig. 82 Pegmatite s
Page 122:
st"uctures are noticed in a few sec
Page 126 and 127:
-----------------------------------
Page 129:
sympathetically with K wt% while, K
Page 136:
132 negative correlations with 5i02
Page 140:
TABLE.7 (Contd .. ) b. TRACE ELEMEN
Page 152 and 153:
distinct positive trends of TiDZ' Z
Page 156 and 157:
corresponding values for Group I I
Page 158 and 159:
C -=O
Page 161 and 162:
TABLE. 10 RESULTS OF MAJOR AND TRAC
Page 170 and 171:
espect i ve I y) reported by Condie
Page 172 and 173:
lV.S.a AMPHIBOLITE Six samples of a
Page 175:
° N ;x:: 12 -+ ON o Z 8 tS • , I
Page 182:
TABLE.12 c NORMATIVE COMPOSITION OF
Page 190 and 191:
Qz Ab (0 ) Or An An ( b ) 186 Fig.
Page 194:
TABLE.13 RESULTS OF MAJOR AND TRACE
Page 204 and 205:
fn pegmatites, al I the end-member
Page 211 and 212:
206 in cordierite- bearing assembla
Page 214:
TABLE. 17 HICROPROBE ANALYSES OF PL
Page 217:
TABLE. 18 Rock type Anal. No. SiOZ
Page 226 and 227:
Based on the classification of Gire
Page 228 and 229:
223 resul ting in temperatures lowe
Page 230:
Exchange thermometers as a group ar
Page 234:
temperature. Revised form of this e
Page 239 and 240:
1/3 Mg3AIZSi301Z + CaFeSiZ06 = 1/3
Page 242 and 243:
237 composition of coexisting felds
Page 244 and 245:
such as garnet result in temperatur
Page 246 and 247:
Holdaway, 1976 and Perchuk & Lavren
Page 249:
VI.4. GEOBAROMETRY 244 Reconstructi
Page 255 and 256:
+ 2 (3300-1. 5T) 4 2 Gt (XMg + (XMg
Page 257 and 258:
252 & Wood (1979), Martignole & Sis
Page 262:
257 modelling of activity compositi
Page 269 and 270:
TABLE.21 contd .... 4000 5000 6000
Page 273:
268 TABLE.23 Garnet-biotite, Two-fe
Page 279:
and 1989) barometers, yield pressur
Page 284:
TABLE.27 MODEL PRESSURE ESTIMATED F
Page 291 and 292:
isolated and azonal clusters and ar
Page 294:
Freezing-heating experiments:- Micr
Page 306:
ate of tectonic vertical exposure a
Page 312 and 313:
esolving the discrepancies and inco
Page 314 and 315:
does not always hold good especiall
Page 320:
315 magmatic cycles, it is reasonab
Page 325:
ims is consistent with a reduction
Page 329 and 330:
transition from ITD into an essenti
Page 331:
along with the microtextural eviden
Page 334 and 335:
APPENDIX 1.1 OUTLINE OF THE PROCEDU
Page 336 and 337:
standard (O.OlN) using Barium diphe
Page 339 and 340:
model TP 2d. to give pellets of 40
Page 342 and 343:
1 .L. • Abbey, 337 S.(1977) Studi
Page 344 and 345:
33·9 23. Bingen,B., Demaiffe, D. a
Page 348 and 349:
343 67. England. P.C. and Thompson,
Page 352 and 353:
L09. Hansen. E.C., Newton. R.C. and
Page 354 and 355:
130. Hoisch. D,T. (1989). geothermo
Page 356 and 357:
151. Johnson. C.A., Essene E.J. (19
Page 358 and 359:
172. Lamb, W . M . , Valley, metamo
Page 361 and 362:
208. N ageswara Rao, J . and Sr in
Page 363:
228. Odom. A.L. (1982) Isotopic age
Page 367:
271. Reddy. A.G.B.. Mathew. M.P ..
Page 372 and 373:
j23. Subramanian. A.P. (1956) Miner
Page 374 and 375:
345. Wedepohl. K.H. (1969) composit
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