Report - Assam: State Geology and Mineral Maps - India Water Portal

GSI Misc. Pub. 30 Pt. 4 Vol. 2(i)
CONTENTS
GSI Misc. Pub. 30 Pt. 4 Vol. 2(i)
1. INTRODUCTION .................................................................................................................... 1
(I) CLIMATE ........................................................................................................................................... 2
(ii) FAUNA, FLORA AND CULTIVATION .............................................................................................. 2
(iii) NATURAL RESOURCES ................................................................................................................... 2
(iv) PHYSIOGRAPHY AND DRAINAGE ................................................................................................ 2
(v) PREVIOUS WORK ............................................................................................................................. 4
(vi) ACKNOWLEDGEMENTS ................................................................................................................. 6
II. GENERAL GEOLOGY AND STRATIGRAPHY ...........................................................................7
(A) GNEISSIC COMPLEX ...................................................................................................................... 10
(B) SHILLONG GROUP ......................................................................................................................... 10
(C) GRANITE PLUTONS ....................................................................................................................... 11
(D) LOWER GONDWANA GROUP ....................................................................................................... 11
(E) ALKALI COMPLEX OF SAMCHAMPI ........................................................................................... 11
(F) SYLHET TRAP ................................................................................................................................. 12
(G) JAINTIA GROUP ............................................................................................................................. 12
(H) DISANG GROUP ............................................................................................................................. 13
(I) BARAIL GROUP .............................................................................................................................. 14
(J) SURMA GROUP .............................................................................................................................. 15
(K) TIPAM GROUP ................................................................................................................................ 16
(L) DUPI TILLA GROUP ....................................................................................................................... 17
(M) DIHING GROUP .............................................................................................................................. 18
(N) QUARTERNARY SEDIMENTS ........................................................................................................ 18
III. STRUCTURE AND TECTONICS .............................................................................................. 20
IV. GEOLOGICAL HISTORY ....................................................................................................... 22
V : DEVELOPMENT OF VILLAGE ECONOMY THROUGH MINERAL ............................................. 23
APPRAISAL PROGRAMME (DOVEMAP)
VI. MINERAL RESOURCES ......................................................................................................... 24
(i) OIL AND NATURAL GAS ............................................................................................................... 24
(ii) COAL ............................................................................................................................................... 24
(iii) LIMESTONE .................................................................................................................................... 27
(iv) BASE METAL ................................................................................................................................... 28
Page
Contd.