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The paper presents the results of comprehensive study of the primary diamond deposit of the Nyurbinskaya pipe in the Yakutian diamondiferous province. It is established, that the pipe is confined to the fault junction of four directions and is composed of the kimberlite of four phases. Analysis of different faults and tectonic fracturing allowed to reconstruct the tectonic stress fields acting at the stage of the kimberlite body formation and to determine their occurrence sequence in time. The data obtained about regularities of the Nyurbinskaya pipe compositional structure and results of geologo-structural studies are combined in a single structural-compositional model of the deposit formation. Peculiarities of the fault network operation during the deposit formation stage are confirmed by experimental results using polarization-optical method. The model allowed to formulate the basic structural characteristics of the prospecting works object within which the formation of kimberlite body type of the Nyurbinskaya pipe is possible and to determine the elements of the fault network which are promising for the kimberlite pipes discovery. Recommended by D.P. GladkochubFor citation: Gladkov A.S., Koshkarev D.A., Cheremnykh A.V., João F., Karpenko M.A., Marchuk M.V., Potekhina I.A. 2016. Structural-compositional model of the Nyurbinskaya kimberlite pipe formation (Sredne-Markha area of the Yakutian Diamondiferous Province). Аннотация: В статье представлены результаты комплексного изучения коренного месторождения алмазов трубка Нюрбинская. Установлено, что трубка приурочена к узлу разломов четырех направлений и сложена T e c t o n o p h y s i c s 435 A.S. Gladkov et al.: Structural-compositional model of the Nyurbinskaya kimberlite pipe formation…кимберлитами четырех фаз. Анализ разноранговых разрывных нарушений и тектонической трещиноватости позволил восстановить поля тектонических напряжений, действовавшие на этапе формирования кимберлитового тела и определить последовательность их проявления во времени. Полученные данные о закономерностях вещественного строения трубки Нюрбинской и результаты геолого-структурных исследований объединены в рамках единой структурно-вещественной модели формирования месторождения. Особенности функционирования разрывной сети на этапе формирования месторождения подтверждены результатами экспериментов с использованием поляризационно-оптического метода. Полученная модель позволила сформулировать признаки, определяющие основные структурные характеристики объекта поисковых работ, в пределах которого возможно формирование кимберлитовых тел типа трубки Нюрбинской, и на их основании выделить те элементы разломной сети (разломные узлы), которые являются перспективными для обнаружения кимберлитовых трубок. Ключевые слова: кимберлиты; Якутская алмазоносная провинция; структурно-тектоническая модель;структурно-вещественная модель

UDC 533.735Thermodiffusion separation of the binary mixtures of argon with an ethanol, n-propanol, and iso-propanol vapor and the binary mixtures of ethanol with an n-propanol and iso-propanol vapor has been measured in the temperature range 331-347 K by the two-flask method and the thermodiffusion factor has been determined. The experimental values of the thermodiffusion factor have been compared to the results of calculation according to the Chapman-Enskog theory.Investigation of the temperature dependence of the factor of thermodiffusion of mixtures containing alcohol vapor is of interest from the viewpoint of both obtaining information on intermolecular interactions of substances and using experimental data directly for practical purposes (calculations of technological processes) and scientific developments. In particular, the values of α T of vapor mixtures are required for determination of the critical supersaturation in investigating the process of volume condensation of the vapor [1].The results of measurements of the factor of thermodiffusion of the binary mixtures of argon with the vapor of ethyl (CH 3 CH 2 OH), n-propyl (CH 3 CH 2 CH 2 OH), and iso-propyl ((CH 3 ) 2 CHOH) alcohols that were carried out by us in the temperature range 279.5-325.0 K by the two-flask method have been given in [2]. The mixtures with a low concentration of the alcohol vapor (x 2 = 0.01, 0.03, and 0.05) were investigated with the aim of studying nucleation in the supersaturated vapor by the diffusion-chamber method [1].The present work is a continuation of investigations of the thermodiffusion factor of mixtures containing alcohol vapor. By using the two-flask method [3], here we have extended the temperature range of determination of α T of the Ar-CH 3 CH 2 OH, Ar-CH 3 CH 2 CH 2 OH, and Ar-(CH 3 ) 2 CHOH mixtures with the aim of approaching diffusion-chamber conditions as close as possible. Measurements of the thermodiffusion separation of mixtures of the same composition as those in [2] were carried out at a constant temperature of the cold volume of a thermodiffuser T c = 295 K and with variation of the hot-volume temperature T h from 373 to 413 K. Furthermore, in this work, we have obtained, by the same method, data on the factor of thermodiffusion of the binary mixtures of the vapor of ethyl alcohol with the vapor of n-propyl and iso-propyl alcohols at the same temperatures T c and T h . The molar concentration of the heavycomponent vapor in the mixture was equal to x 2 = 0.3, 0.5, and 0.7 at a total pressure of the mixture in the thermodiffuser of ,0.01⋅10 5 Pa.The binary mixtures were composed at room temperature according to the partial-pressure method. Chemically pure alcohols and pure (A grade) argon (argon content no less than 0.9999) were used as the components. The concentration of the mixture after its separation was analyzed by the katharometric method.The value of the factor of thermodiffusion α T of the binary systems was determined from the relation [4]where x 2 = 1 − x 1 and S is the measured value of the t...

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