Phenomena of assimilation and hybridism in alkaline rocks of Tagoba-Sobak
Abstract
In 1935 the author was making geological explorations in the upper course of the Zeravshan River which flows through the territory of the Tadjik SSR. During these works he was able to visit the outcrops of alkaline rocks in the region of the upper waters of the river Tagoba-Sobak (fig. 1). The coordinates of the outcrop of the alkaline rocks are as follows: Longitude 69° 40′ E (from Greenwich), latitude, 39° 45′ N. The alkaline rocks of the outcrop in question had been visited previously by several explorers, and they are described with sufficient details in a paper by M. A. Preobrajensky, published in 1911 (8). Yet the field observations of the author of the present paper and the microscopic examination of thin sections of the rocks collected suggest somewhat different ideas concerning the genesis of the alkaline rocks of Tagoba-Sobak in contradiction to the data published in special literature. This circumstance induced the author to put the materials in his possession to a more detailed study the conclusions whereof are briefly set forth below.
None
References
- Proceedings of St. Petersburg. Min. Society Zapiski Spb. Min. Obshch., vol. XIX, 193, 1883. (in Russian)
- Notes from St. Petersburg. Min. Society Zapiski Spb. Min. Obshch., ser., 2, part 31, 1894. (in Russian)
- Mushketov I.V. -- Geological expedition to the Zeravshan glacier in 1880, vol. II, Turkestan, 1906.
- Markovsky A.P. -- Main features of the geological structure of the middle part of central Tajikistan. Tr. TKE. 1934. (in Russian)
- Nikitin I.K. -- Petrographic sketch of route survey on the northern slope of the Turkestan ridge, State. N.-techn. Geol. Development Publishing housen Gos. N.-tekhn. Geol. Razv. Izd., 1933. (in Russian)
- Nikitin I.K. -- On the geology of the northern slope of the Turkestan ridge. Tajik-Pamir expedition 1934, vol. L. Proceedings of the expedition. (in Russian)
- Nikitin I.K. -- Geological structure of the upper reaches of Zeravshan and Western Karategin. (TsNIGRI funds, manuscript.) (in Russian)
- Preobrazhenskii I.A. - Nepheline syenites of the upper reaches of the river. Tagoby-Sobak in the upper Zeravshan basin. Izv. St. Petersburg. Polytechnic inst. Izv. SPB. Politekhnich. inst., vol. XV, 1911. (in Russian)
- Sobolevsky V.N. -- Nepheline syenites of the upper reaches of Zeravshan. Collection Tajik Complex Expedition 1932, Goskhimtekhizdat, 1933. (in Russian)