Петрография лампрофиров Ендегеччюйской площади Яна-Адычанского оловорудного района = Petrography of lamprophyres of the Endegechu area of the Yana-Adycha tin ore region
Статья в журнале
Русский
552(571.56)
10.25587/2587-8751-2023-4-42-50
Адычанская магматическая зона; Ендегеччуйская площадь; дайки; лампрофиры; петрография; структура; метасоматические процессы; сферолиты; графит; флюид; Adycha magmatic zone; Endegechu area; dykes; lamprophyres; petrography; structure; metasomatic processes; spherulites; graphite; fluid
Геология
The article considers the features of the petrographic composition of the lamprophyre dyke, attributed to the kHunkhadi complex of Late Cretaceous age, established on the Endegechchu hill in the Yano-Adycha tin ore region located in the Adycha tectonic zone. The rocks have a porphyry structure, and mineral formations of their own magmatic stage, magmatic, metasomatic and late hydrothermal-metasomatic substitutions are isolated in their composition. Acharacteristic feature of these rocks are spherulites of concentric-zonal structure, covered with a shell of scaly or lamellar graphite, depending on the size of the spherulites, evenly distributed throughout the rock, which were studied for the rst time and have not been established in other igneous rocks widely developed in the area. The study of spherulites is an important petrological task, which makes it possible to identify the mechanisms of their formation and causes, can indicate the conditions of formation and sources of matter of the rocks containing them. The morphology of graphite, its distribution and the nature of its relationship with surrounding minerals are also very informative for establishing the primary nature of graphite and epigenetic changes in host rocks as a result of various hydrothermal-metasomatic processes, which is possible due to the ability of carbonaceous matter to redistribute in the rock when exposed to various forces, rather than being removed from it.
Шепелева, Я. П. Петрография лампрофиров Ендегеччюйской площади Яна-Адычанского оловорудного района / Я. П. Шепелева, С. В. Горский ; Северо-Восточный федеральный университет им. М. К. Аммосова // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. Серия: Науки о земле. - 2023. - N 4 (32). - C. 42-50. - DOI: 10.25587/2587-8751-2023-4-42-50
DOI: 10.25587/2587-8751-2023-4-42-50
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