geologyИзвестия высших учебных заведений. Геология и разведкаProceedings of higher educational establishments. Geology and Exploration0016-77622618-8708Sergo Ordzhonikidze Russian State University for Geological Prospectinggeology-86Research ArticleМИНЕРАЛОГИЯ, ПЕТРОГРАФИЯ, ЛИТОЛОГИЯMINERALOGY, PETROGRAPHY, LITHOLOGYВысокобарические меланократовые породы Анрахайского сиалического массива (Южный Казахстан): особенности минерального, химического состава и параметры метаморфизмаHigh-pressure melanocratic rocks of Anrakhai sialic massif (Southern Kazakhstan): the features of mineral, chemical compositions and metamorphism pathsПилицынаА. В.PilitsynaA. V.an.pilitsyna@gmail.comТретьяковА. А.TretyakovA. A.noemail@neicon.ruДегтяревК. Е.DegtyarevK. E.noemail@neicon.ruКовальчукЕ. В.KovalchukE. V.geofishko@gmail.comГИН РАНРоссияGIN RASRussian FederationИГЕМ РАНРоссияIGEM RASRussian Federation201528122015062844Copyright © Пилицына А.В., Третьяков А.А., Дегтярев К.Е., Ковальчук Е.В., 20152015Пилицына А.В., Третьяков А.А., Дегтярев К.Е., Ковальчук Е.В.Pilitsyna A.V., Tretyakov A.A., Degtyarev K.E., Kovalchuk E.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.geology-mgri.ru/jour/article/view/86

В строении Анрахайского массива Чу-Илийского региона (Южный Казахстан) выделены метаморфические образования, сформированные в условиях повышенных температур и давлений, соответствующих полю эклогитовой фации, и представленные эклогитами и гранатовыми пироксенитами. Анализ минерального и химического составов меланократовых высокобарических разностей и детальные петрографические и геолого-структурные исследования позволили охарактеризовать Р-Т параметры формирования метаморфических пород (давление 1,6-2,1 ГПа при температуре « 750-840°С) и определить состав протолита, представлявшего собой, по-видимому, фрагмент дифференцированного комплекса базит-гипербазитового состава, располагавшегося до метаморфизма в пределах континентальной коры.

In the structure of Anrakhai massif of Chu-Ili region (Southern Kazakhstan) metamoiphic formations of high-pressure conditions derivation (under eclogite facies field) were identified; the rocks are represented by eclogites and garnet clinopiroxenites. Investigation of mineral and chemical compositions of melanocratic high-pressure varieties as well as detailed petrographic and geological studies allowed characterizing P-T parameters of the metamorphic rocks formation (P 1,6-2,1 GPa; Г750-840°C), determining presumed protolith composition for them, that represented evidently the fragment of differentiated complex of mafic-ultramafic compositions, located within the continental crust prior metamorphism.

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The authors declare that there are no conflicts of interest present.