(a) Tin MINERAL CONCESSIONS GRANTED IN BURMA DURING 1937.* The number of concessions granted during the year was 317, of which 178 were new prospecting licences, 93 were renewals of previously granted prospecting licences and 46 were mining leases. The total number of concessions held on the 31st December 1937 was 597, of which 276 were held under mining leases and 321 under prospecting licenses. Details regarding the number of concessions classified according to the minerals for which they were granted are given below: (1) Issued during 1937 (2) Held on the 31st December 1937. 1 *Taken from "Report on the mineral production of Burma for the year 1937", THE WESTERN MARGIN OF THE EASTERN GHATS IN SOUTHERN JEYPORE. BY H. CROOKSHANK, B.A., B.A.I.(Dub.), I. NATURE OF THE WESTERN MARGIN OF THE EASTERN GHATS II. THE OLDer Gneisses in THE MALAKANAGIRI TAHSIL IV. THE CHARNOCKITE SERIES IN THE EASTERN GHATS VIII. THE CHARNOCKITES OF MALAKANAGIRI AND ST. THOMAS' MOUNT I.-NATURE OF THE WESTERN MARGIN OF THE EASTERN Region mapped. During the field seasons 1934-35 and 1935-36 I mapped a small Sir L. L. Fermor desired me to visit this region partly because Reasons for mapping. to ascertain whether the western margin of the Eastern Ghats was here a fault. The belief that such was the case was very generally held. It had originated by a tentative suggestion of Walker (1902, p. 10). Middlemiss did not subscribe to this belief in his published work, but he made suggestions similar to Walker's in his unpublished progress report for 1902-03. The strongest evidence of a faulted boundary seems, however, to be the regular linear boundary between the crystallines and the charnockites shown on the 1 inch to 32 miles geological map of India. Such a fault, if the upthrow were to the east, might have raised the Eastern Ghats some thousands of feet, and an uplift of this nature would, according to Fermor (1935, p. 48), account for the relatively high grade of metamorphism met with in some of the rocks of this region. In discussing the nature of the margin of the Eastern Ghats the views of earlier observers must be considered. Walker and Middlemiss are the only geologists who had visited this region before me. Of these two Walker's views are the more important because he mapped a large part of the boundary region. Middlemiss mapped for the most part further to the east and only made a few traverses as far west as the boundary. In 1899 Walker mapped most of central Jeypore including the area immediately north of my map. In his published description of this area (1910, p. 171) he makes the following remarks about the charnockites and their boundary with the crystalline schists lying further to the Walker's evidence. west. Views of earlier observers. 'I am inclined to regard these hypersthene rocks' (i.e., the charnockites) as forming a great igneous stock, though it would be very difficult to prove conclusively that this was the case'. Again he reports numerous small hills of the same lithological character as the large massif, not indicated in the accompanying geologically coloured map, lie like islands in the schist complex'. 6 The following is his description of the boundary The actual contact with the crystalline schist is nowhere exposed and the boundaries of the islands as well as the main massif as marked on the geological map, are only approximate at best'. His map, however, showed that he thought the boundary an irregular one. H |
Get this book in print
0 Reviews Reviews aren't verified, but Google checks for and removes fake content when it's identified Write review |