Dyke swarm features in Shyok, Ladakh

Google analytics Link

Leucogranite dykes of the Pangong Range, Eastern Karakoram, Ladakh

Fig. 1a. Leucogranite and pegmatite dykes. Note person for scale at the bottom of the photo. Steep exposure between Tangtse and Muglib

Details of a.

Fig. 2a. Leucogranite dyke through calc-silicate rock (dark green tinge) spreading laterally into a sill below a 50 cm wide zone of migmatitic biotite-schist. Note internal layering in leucogranite parallel to its margins. Steep exposure in the Tangtse - Muglib gorge.

Detail of a.

Fig. 3a. Leucogranite dyke injection.
Vertical exposure in the Darbuk-Shyok gorge.

Fig. 3b, c. Injections in the same area as Fig. 3a.

Fig. 4. Early medium-grained dykes and late coarse-grained dyke. Deformation caused indentation of the less competent finer grained dyke. Steep exposure in the Darbuk-Shyok gorge.

Fig. 5. Early finer grained dykes in intermediate calc-alkaline intrusion, cross cut by later coarse-grained leucogranite. Both folded. Outcrop in the vicinity of Fig. 4.

Fig. 6 (3973). Dykes through diorite. Shyok valley.

Fig. 7 (3979). Spider dykes, where three pegmatite dykes with different orientations merge with no apparent cross-cutting relationships. Shyok valley.

Fig. 8 (1441). Dyke through diorite. Shyok valley.

Fig. 9 (1442). Same. Shyok valley.

Fig. 10 (1457). Dyke through diorite. Shyok valley.

Fig. 11 (1459). Two dykelets diverging at 90 degrees. Shyok valley.

Fig. 12(1347). Two dyke phases. The earlier dyke (horizontal in photo) has large hornblende grains. Shyok valley.

Fig. 13 (1344). Folded leucocratic dykes. Shyok valley.

Fig. 14 (1438). Shyok valley.

Fig. 15 (1443). Two dyke phases, later one on shear planes.

Fig. 16 (1468). Shyok valley.