Выявление геохимических аномалий, связанных с Sn-W минерализацией в провинции Донг Ван, Северо-Восточный Вьетнам, с использованием статистических методов
Автор: Хунг Хуонг Те
Журнал: Горные науки и технологии @gornye-nauki-tekhnologii
Рубрика: Геология месторождений полезных ископаемых
Статья в выпуске: 2 т.7, 2022 года.
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Изучение Sn-W комплексной (поликомпонентной) минерализации в провинции Донг Ван, северо-восточный Вьетнам, проводилось с использованием статистических и мультивариантных подходов на основе 890 проб донных отложений водных потоков, отобранных для анализа на 27 элементов. Результаты частотного анализа показали, что Sn, W, Pb, As, Bi, Li, Ta, Ce, Ag, Sb и Be имеют тесные связи с комплексными рудами, что означает, что эти элементы могут быть использованы в качестве поисковых индикаторов комплексной (поликомпонентной) минерализации. Кроме того, были проведены исследования с использованием корреляционных матриц и дендрограмм для разделения элементов в анализах проб донных отложений на две группы: связанные с комплексной минерализацией (подгруппы Be-Sn-W-Bi и, в меньшей степени, Li-Pb) и не связанные с минерализацией (подгруппы As-Cd-Sc-Cr-Ce- La, Co-Ni-V и Ga-Ge-Ba). Sn и W были признаны лучшими элементами-индикаторами минерализации, согласно результатам геохимического моделирования и расположению их аномалий в провинции. Более того, в провинции Донг Ван были выявлены обширные геохимические аномалии Sn и W (с использованием пороговых значений содержаний (среднее ± 3 STD)), что дает наиболее важные указания для поисков комплексной минерализации в провинции. Исследования также указывают на генетические связи между комплексной минерализацией провинции и системой разломов направления северо-запад - юго-восток и скрытыми гранитоидными блоками. В итоге проведенный статистический анализ содержаний (с использованием пороговых значений) в пробах донных отложений позволил выявить индикаторные элементы и их геохимические аномалии и использовать их в качестве эффективных инструментов при дальнейших поисках и разведке комплексной минерализации в провинции.
Геохимические аномалии, sn-w минерализация, статистические методы, geostatistic, провинция донг ван, северо-восточный вьетнам
Короткий адрес: https://sciup.org/140295674
IDR: 140295674 | DOI: 10.17073/2500-0632-2022-2-100-110
Identification of geochemical anomalies associated with Sn-W mineralization in the Dong Van region, North-Eastern Vietnam, using statistical methods
Sn-W multimetal mineralization in the Dong Van region, North-Eastern Vietnam was studied using statistical and multivariate approaches based on 890 samples of stream bottom sediments collected for assaying for 27 elements. The findings of frequency analysis demonstrated that Pb, As, Bi, Li, Sn, W, Ta, Ce, Ag, Sb, and Be have close ties with multimetal ores, implying that these elements can be used as prospecting indicators for multimetal mineralization. In addition, correlation matrix and dendrogram studies were also applied to subdivide the elements in the stream bottom sediment samples assays into two groups: associated with multimetal mineralization (Be-Sn-W-Bi, and, to a lesser extent, Li-Pb sub-groups) and not associated with the mineralization: (As-Cd-Sc-Cr-Ce-La, Co-Ni-V, and Ga-Ge-Ba sub-groups). Sn and W were found to be the best indicator elements for the mineralization, according to the findings of geochemical modeling and location of their anomalies in the region. Furthermore, extensive Sn and W anomalies were identified in the Dong Van region (using threshold values (mean ± 3 STD), providing the most important indications for multimetal mineralization prospecting in the region. The studies also suggest genetic ties between the region’s multimetal mineralization and the northwest-southeast fault system and concealed granitoid blocks. Finally, the performed statistical analyses (with the use of threshold values) of stream bottom sediments assays allowed revealing indicator elements and their geochemical anomalies and using them as an effective tool in further prospecting and exploration for multimetal mineralization in the region.
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