Preliminary Geology And Petrography Of Swat Kohistan

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'10. 9. CONTOUR DIAGRAM ,OF 806 JOINTS FROM FA~EHPUR TO 'PESHMAL, WHERE THE FOLIATION TREND IS FAIRLY CONSISTE~T i.a., N 16 w TO N 45 E. PLOTTED ON LOWER HEMISPHERE. . .
ank do not extend on the eastern side which is occupied by diorites of different appearance and texture. It can thus be assumed that a fault runs along the stream to the south of Dewangar. Consequently, the western part of the valley having been shifted to the south as compared to its eastern pert, by more than s mile. A similar situation is seen in the volcanic rocks near Paloga where the southern limit extends 1% miles more on the western bank than on the eastern. However, it is also possible that this difference may be due to the intrusion of the granites, more on the eastern side. The age of the fault may be post volcanic and diorites, however, it appears to be older than the Dewangar Granite which has not been affected. The volcanic rocks have been inturded by the diorites of Gabral, Deshai, and the Matiltan Granite. The latter, and the granites of Dewangar, also intrude the diorites, It is clear from Matsushita's account that the eastern tributary of Dewangar confluence fiows along the contact of diorites and granite. Same may also be the case with the western tributary. Because of extreme relief, the contact between the volcanic rocks and the Basic Complex has not been carefully studied. Matsushita and Huzita (1966) pointed out that "the geological structure of the Western Ka.rakoram is characterized by the zonal arrangement of rock formasions .................. the boundary between each zone is in some cases represented by a fault." We have noted a similar zonal arrangement in Swat Kohistan, although not as perfect as that of their area. The southern part of Swat Kohistan is occupied by the Basic Complex, extending to the eest and west. North of this is the zone of metasedimentary and volcanic rocks extending up to (?) westernDir, Further north are zones of diorites (of Deshai and Gabral) and Dewangar Granite. All of the plutonic rocks, apparently, are connected with the Himalayan orogeny. ECONOMIC GEOLOGY . In addition to preparing a 'base map, a main purpose of the work in Swat Kohistan waa the search for economjc minerals. A few days mere also spent in the Indus Valley to investigate the potentials of the ultrnmafic rocks exposed near Jijal along the Indue River. Following is the result of the id~esti~ation: (a) Building a ~ Decorative d Material. Most of the Swat Kohistsn is covered by plutonic igneous rocks of light to medium colour which are suitable for building purposes. Special mention can
Page 1 and 2: Ecol. Bull. Univ. Peshawar, Val. 6,
Page 3 and 4: narrow gorges are formed rt some pl
Page 5 and 6: Dewangar Granite ? Middle Porphyrit
Page 7 and 8: They appear; to have been gradually
Page 9 and 10: para.lle1 to foli~.tion. Moxt of th
Page 11 and 12: Local, small intrusions of granites
Page 13 and 14: Fig. ll. Pegmatite near Brhrtn with
Page 15: preeence of chlorite, epidote, and
Page 18 and 19: some breccies to the southwest of K
Page 20 and 21: The rocks to the southwest of Dewan
Page 22 and 23: The roclrs are generally in the for
Page 24 and 25: The rocks are mediam-grained, hypid
Page 26: . development of a clinoampi~ibole
Page 31 and 32: Hovever, there are a few rooks in w
Page 33 and 34: most. The main metallic minerals no
Page 35: BIARTIN, N.R., SIDDIQUI, S.F.A. and

Preliminary Geology And Petrography Of Swat Kohistan

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