gscienceMining Science and Technology (Russia)Горные науки и технологии2500-0632The National University of Science and Technology MISiIS (NUST MISIS)10.17073/2500-0632-2022-2-100-110gscience-346Research ArticleGEOLOGY OF MINERAL DEPOSITSГЕОЛОГИЯ МЕСТОРОЖДЕНИЙ ПОЛЕЗНЫХ ИСКОПАЕМЫХIdentification of geochemical anomalies associated with Sn-W mineralization in the Dong Van region, North-Eastern Vietnam, using statistical methodsВыявление геохимических аномалий, связанных с Sn-W минерализацией в провинции Донг Ван, северо-восточный Вьетнам, с использованием статистических методовhttps://orcid.org/0000-0003-1544-6470ХунгХ. Т.HungK. T.

Хуонг Те Хунг – доктор наук (науки о Земле), преподаватель, кафедра поисково-разведочной геологии

Scopus ID 36716173500

г. Ханой

Khuong The Hung – Dr. Sci. (Earth Sci.), Lecturer, Department of Prospecting and Exploration Geology

Hanoi

khuongthehung@humg.edu.vnХанойский университет горного дела и геологииВьетнамHanoi University of Mining and GeologyViet Nam20222007202272100110Copyright © Hung K.T., 20222022Хунг Х.Т.Hung K.T.This work is licensed under a Creative Commons Attribution 4.0 License.https://mst.misis.ru/jour/article/view/346

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.

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 аномалииSn-W минерализациястатистические методыGeostatisticпровинция Донг Вансеверо-восточный Вьетнамgeochemical anomaliesSn-W mineralizationstatistical methodsDong Van regionNorth-Eastern VietnamReferencesTri T. V., Khuc V. (eds.). Geology and Earth Resources of Vietnam. General Department of Geology and Minerals of Vietnam: Publishing House for Science and Technology. 2011. 645 p.Tri T. V., Khuc V. (eds.). Geology and Earth Resources of Vietnam. General Department of Geology and Minerals of Vietnam: Publishing House for Science and Technology. 2011. 645 p.Hung K. T., Sang P. N., Phuong N. et al. Statistical evaluation of the geochemical data for prospecting complex mineralization in the Suoi Thau-Sang Than region, Northeast Vietnam. Geology, Geophysics and Environment. 2020;46(4):285–299. https://doi.org/10.7494/geol.2020.46.4.285Hung K. T., Sang P. N., Phuong N. et al. Statistical evaluation of the geochemical data for prospecting complex mineralization in the Suoi Thau-Sang Than region, Northeast Vietnam. Geology, Geophysics and Environment. 2020;46(4):285–299. https://doi.org/10.7494/geol.2020.46.4.285Carranza E. J. M. Usefulness of stream order to detect stream sediment geochemical anomalies. Geochemistry: Exploration, Environment, Analysis. 2005;4(4):341–352. https://doi.org/10.1144/1467-7873/03-040Carranza E. J. M. Usefulness of stream order to detect stream sediment geochemical anomalies. Geochemistry: Exploration, Environment, Analysis. 2005;4(4):341–352. https://doi.org/10.1144/1467-7873/03-040Cheng Q., Jing L., Panahi A. Principal component analysis with optimum order sample correlation coefficient for image enhancement. International Journal of Remote Sensing. 2006;27(16):3387–3401. https://doi.org/10.1080/01431160600606882Cheng Q., Jing L., Panahi A. Principal component analysis with optimum order sample correlation coefficient for image enhancement. International Journal of Remote Sensing. 2006;27(16):3387–3401. https://doi.org/10.1080/01431160600606882Reimann C., Filzmoser P., Garrett R. G., Dutter R. Statistical Data Analysis Explained: Applied Environmental Statistics with R. Wiley, Chichester, UK; 2008. 362 p. https://doi.org/10.1002/9780470987605Reimann C., Filzmoser P., Garrett R. G., Dutter R. Statistical Data Analysis Explained: Applied Environmental Statistics with R. Wiley, Chichester, UK; 2008. 362 p. https://doi.org/10.1002/9780470987605Cheng Q., Bonham-Carter G., Wang W., Zhang S., Li W., Qinglin X. A spatially weighted principal component analysis for multi-element geochemical data for mapping locations of felsic intrusions in the Gejiu mineral district of Yunnan, China. Computers and Geosciences. 2011;37(5):662–669. https://doi.org/10.1016/j.cageo.2010.11.001Cheng Q., Bonham-Carter G., Wang W., Zhang S., Li W., Qinglin X. A spatially weighted principal component analysis for multi-element geochemical data for mapping locations of felsic intrusions in the Gejiu mineral district of Yunnan, China. Computers and Geosciences. 2011;37(5):662–669. https://doi.org/10.1016/j.cageo.2010.11.001Zuo R. Identification of geochemical anomalies associated with mineralization in the Fanshan district, Fujian, China. Journal of Geochemical Exploration. 214;139:170–176. https://doi.org/10.1016/j.gexplo.2013.08.013Zuo R. Identification of geochemical anomalies associated with mineralization in the Fanshan district, Fujian, China. Journal of Geochemical Exploration. 214;139:170–176. https://doi.org/10.1016/j.gexplo.2013.08.013Aitchison J. The Statistical Analysis of Compositional Data. Chapman & Hall, London; 1986. 416 p. https://doi.org/10.1002/bimj.4710300705Aitchison J. The Statistical Analysis of Compositional Data. Chapman & Hall, London; 1986. 416 p. https://doi.org/10.1002/bimj.4710300705Tukey J. W. Exploratory data analysis. Reading, Massachusetts: Addison-Wesley Publishing Company; 1977. 688 p. https://doi.org/10.1177/014662167800200115Tukey J. W. Exploratory data analysis. Reading, Massachusetts: Addison-Wesley Publishing Company; 1977. 688 p. https://doi.org/10.1177/014662167800200115Sun X., Deng J., Gong Q. et al. Kohonen neural network and factor analysis based approach to geochemical data pattern recognition. Journal of Geochemical Exploration. 2009;103(1):6–16. https://doi.org/10.1016/j.gexplo.2009.04.002Sun X., Deng J., Gong Q. et al. Kohonen neural network and factor analysis based approach to geochemical data pattern recognition. Journal of Geochemical Exploration. 2009;103(1):6–16. https://doi.org/10.1016/j.gexplo.2009.04.002Mandelbrot B. B. The fractal geometry of nature. Freeman, San Francisco; 1983. 468 p.Mandelbrot B. B. The fractal geometry of nature. Freeman, San Francisco; 1983. 468 p.Agterberg F. P. Multifractal modeling of the sizes and grades of giant and supergiant deposits. International Geology Review. 1995;37(1):1–8. https://doi.org/10.1080/00206819509465388Agterberg F. P. Multifractal modeling of the sizes and grades of giant and supergiant deposits. International Geology Review. 1995;37(1):1–8. https://doi.org/10.1080/00206819509465388Wang Q. F., Deng J., Zhao J. et al. Tonnage-cutoff model and average grade-cutoff model for a single ore deposit. Ore Geology Reviews. 2010;38(1–2):113–120. https://doi.org/10.1016/j.oregeorev.2010.07.003Wang Q. F., Deng J., Zhao J. et al. Tonnage-cutoff model and average grade-cutoff model for a single ore deposit. Ore Geology Reviews. 2010;38(1–2):113–120. https://doi.org/10.1016/j.oregeorev.2010.07.003Yang L. Q., Wang Q. F., Liu X. F. Correlation between mineralization intensity and fluid-rock reaction in the Xinli gold deposit, Jiaodong Peninsula, China: constraints from petrographic and statistical approaches. Ore Geology Reviews. 2015;71:29–39. https://doi.org/10.1016/j.oregeorev.2015.04.005Yang L. Q., Wang Q. F., Liu X. F. Correlation between mineralization intensity and fluid-rock reaction in the Xinli gold deposit, Jiaodong Peninsula, China: constraints from petrographic and statistical approaches. Ore Geology Reviews. 2015;71:29–39. https://doi.org/10.1016/j.oregeorev.2015.04.005Reimann C., Filzmoser P., Garrett R. G. Background and threshold: critical comparison of methods of determination. Science of the Total Environment. 2005;346(1–3):1–16. https://doi.org/10.1016/j.scitotenv.2004.11.023Reimann C., Filzmoser P., Garrett R. G. Background and threshold: critical comparison of methods of determination. Science of the Total Environment. 2005;346(1–3):1–16. https://doi.org/10.1016/j.scitotenv.2004.11.023Cheng Q. Mapping singularities with stream sediment geochemical data for prediction of undiscovered mineral deposits in Gejiu, Yunnan Province, China. Ore Geology Reviews. 2007;32(1–2):314–324. https://doi.org/10.1016/j.oregeorev.2006.10.002Cheng Q. Mapping singularities with stream sediment geochemical data for prediction of undiscovered mineral deposits in Gejiu, Yunnan Province, China. Ore Geology Reviews. 2007;32(1–2):314–324. https://doi.org/10.1016/j.oregeorev.2006.10.002Sun X., Gong Q., Wang Q. et al. Application of local singularity model to delineate geochemical anomalies in Xiong’ershan gold and molybdenum ore district,Western Henan province, China. Journal of Geochemical Exploration. 2010;107(1):21–29. https://doi.org/10.1016/j.gexplo.2010.06.001Sun X., Gong Q., Wang Q. et al. Application of local singularity model to delineate geochemical anomalies in Xiong’ershan gold and molybdenum ore district,Western Henan province, China. Journal of Geochemical Exploration. 2010;107(1):21–29. https://doi.org/10.1016/j.gexplo.2010.06.001Zuo R., Xia Q., Zhang D. A comparison study of the C–A and S–A models with singularity analysis to identify geochemical anomalies in covered areas. Applied Geochemistry. 2013;33:165–172. https://doi.org/10.1016/j.apgeochem.2013.02.009Zuo R., Xia Q., Zhang D. A comparison study of the C–A and S–A models with singularity analysis to identify geochemical anomalies in covered areas. Applied Geochemistry. 2013;33:165–172. https://doi.org/10.1016/j.apgeochem.2013.02.009Graedel T. E., Harper E. M., Nassar N. T., Reck B. K. On the materials basis of modern society. Proceedings of the National Academy of Sciences. 2013;112(20):6295–6300. https://doi.org/10.1073/pnas.1312752110Graedel T. E., Harper E. M., Nassar N. T., Reck B. K. On the materials basis of modern society. Proceedings of the National Academy of Sciences. 2013;112(20):6295–6300. https://doi.org/10.1073/pnas.1312752110Dovzhikov A. E., My B. P., Vasilevskaya E. D. et al. Geology of North Vietnam. Hanoi: Science and Technology Publishing House; 1965. 650 p. (In Russ.)Dovzhikov A. E., My B. P., Vasilevskaya E. D. et al. Geology of North Vietnam. Hanoi: Science and Technology Publishing House; 1965. 650 p. (In Russ.)Tinh H. X. (ed.). Report on results of geological mapping and mineral investigation of Bao Lac sheet at 1:200.000 scale. Geological Department of Vietnam, Ha Noi; 1976. (In Vietnamese)Tinh H. X. (ed.). Report on results of geological mapping and mineral investigation of Bao Lac sheet at 1:200.000 scale. Geological Department of Vietnam, Ha Noi; 1976. (In Vietnamese)Truyen M. T. (ed.). Report on results of geological mapping and mineral investigation of Bao Lac sheet at 1:50.000 scale. Geological Department of Vietnam, Ha Noi; 1977. (In Vietnamese)Truyen M. T. (ed.). Report on results of geological mapping and mineral investigation of Bao Lac sheet at 1:50.000 scale. Geological Department of Vietnam, Ha Noi; 1977. (In Vietnamese)Tri T. V. (ed.). Report on results of geological and mineral potential mapping of Bao Lac-Bac Quang-Ma Quang at 1:200.000 scale. Geological Department of Vietnam, Ha Noi; 2000 (In Vietnamese)Tri T. V. (ed.). Report on results of geological and mineral potential mapping of Bao Lac-Bac Quang-Ma Quang at 1:200.000 scale. Geological Department of Vietnam, Ha Noi; 2000 (In Vietnamese)Izokh A. E., Polyakov G. V., Hoa T. T., Balykin P. A., Phuong N. T. Permian–Triassic ultramafic–mafic magmatism of Northern Vietnam and Southern China as expression of plume magmatism. In: 32nd International Geological Congress. 2005;46:942–951. (In Russ.)Izokh A. E., Polyakov G. V., Hoa T. T., Balykin P. A., Phuong N. T. Permian–Triassic ultramafic–mafic magmatism of Northern Vietnam and Southern China as expression of plume magmatism. In: 32nd International Geological Congress. 2005;46:942–951. (In Russ.)Hoa T. T., Anh T. T., Phuong N. T. et al. Permo-Triassic intermediate–felsic magmatism of the Truong Son belt, eastern margin of Indochina. ComptesRendus Geoscience. 2008;340(1–2):112–126. https://doi.org/10.1016/j.crte.2007.12.002Hoa T. T., Anh T. T., Phuong N. T. et al. Permo-Triassic intermediate–felsic magmatism of the Truong Son belt, eastern margin of Indochina. ComptesRendus Geoscience. 2008;340(1–2):112–126. https://doi.org/10.1016/j.crte.2007.12.002Polyakov G. V., Shelepaev R. A., Hoa T. T. et al. The Nui Chua layered peridotitegabbro complex asmanifestation of Permo-Triassic mantle plume in northern Vietnam. Russian Geology and Geophysics. 2009;50(6):501–516. https://doi.org/10.1016/j.rgg.2008.10.002Polyakov G. V., Shelepaev R. A., Hoa T. T. et al. The Nui Chua layered peridotitegabbro complex asmanifestation of Permo-Triassic mantle plume in northern Vietnam. Russian Geology and Geophysics. 2009;50(6):501–516. https://doi.org/10.1016/j.rgg.2008.10.002Vladimirov A. G., Balykin P. A., Anh P. L. et al. The Khao Que-Tam Tao gabbro-granite massif, Northern Vietnam: a petrological indicator of the Emeishan plume. Russian Journal of Pacific Geology. 2012;6:395–411. https://doi.org/10.1134/S1819714012050065Vladimirov A. G., Balykin P. A., Anh P. L. et al. The Khao Que-Tam Tao gabbro-granite massif, Northern Vietnam: a petrological indicator of the Emeishan plume. Russian Journal of Pacific Geology. 2012;6:395–411. https://doi.org/10.1134/S1819714012050065Hai T. T., Thanh N. X., Halpin J. A., Zaw K. The occurrence of ophiolite-style assemblages along Sino-Vietnam border, Northeastern Vietnam and its implication to the tectonic evolution of Northeastern Indochina. In: Proceedings of the International Conference on Geology. Geotechnology and Mineral Resources of Indochina (GEOINDO 2011), KhonKaen. 2011. Pp. 479–488.Hai T. T., Thanh N. X., Halpin J. A., Zaw K. The occurrence of ophiolite-style assemblages along Sino-Vietnam border, Northeastern Vietnam and its implication to the tectonic evolution of Northeastern Indochina. In: Proceedings of the International Conference on Geology. Geotechnology and Mineral Resources of Indochina (GEOINDO 2011), KhonKaen. 2011. Pp. 479–488.Thang P. V. (ed.). Report on the results of prospecting Sn-W mineralization and accompaning minerals in the northwestern Ha Giang area. Geological Department of Vietnam, Ha Noi; 1988. (In Vietnamese)Thang P. V. (ed.). Report on the results of prospecting Sn-W mineralization and accompaning minerals in the northwestern Ha Giang area. Geological Department of Vietnam, Ha Noi; 1988. (In Vietnamese)Reimann C., Filzmoser P. Normal and lognormal data distribution in geochemistry: death of a myth. Consequences for the statistical treatment of geochemical and environmental data. Environmental Geology. 2000;39:1001–1014. https://doi.org/10.1007/s002549900081Reimann C., Filzmoser P. Normal and lognormal data distribution in geochemistry: death of a myth. Consequences for the statistical treatment of geochemical and environmental data. Environmental Geology. 2000;39:1001–1014. https://doi.org/10.1007/s002549900081Chakravarti R., Laha G., Roy J. Handbook of Methods of Applied Statistics. Volume I. John Wiley and Sons; 1967. 160 p.Chakravarti R., Laha G., Roy J. Handbook of Methods of Applied Statistics. Volume I. John Wiley and Sons; 1967. 160 p.Egozcue J. J., Pawlowsky-Glahn V., Mateu-Figueras G., Barceló-Vidal C. Isometric logratio transformations for compositional data analysis. Mathematical Geology. 2003;35:279–300. https://doi.org/10.1023/A:1023818214614Egozcue J. J., Pawlowsky-Glahn V., Mateu-Figueras G., Barceló-Vidal C. Isometric logratio transformations for compositional data analysis. Mathematical Geology. 2003;35:279–300. https://doi.org/10.1023/A:1023818214614Carranza E. J. M. Analysis and mapping of geochemical anomalies using logratiotransformed stream sediment data with censored values. Journal of Geochemical Exploration. 2011;110(2):167–185. https://doi.org/10.1016/j.gexplo.2011.05.007Carranza E. J. M. Analysis and mapping of geochemical anomalies using logratiotransformed stream sediment data with censored values. Journal of Geochemical Exploration. 2011;110(2):167–185. https://doi.org/10.1016/j.gexplo.2011.05.007Ward J. H. Jr. Hierarchical grouping to optimize an objective function. Journal of the American Statistical Association, 1963;58:236–244. https://doi.org/10.1080/01621459.1963.10500845Ward J. H. Jr. Hierarchical grouping to optimize an objective function. Journal of the American Statistical Association, 1963;58:236–244. https://doi.org/10.1080/01621459.1963.10500845Robertson G. P. GS+: Geostatistics for the Environmental Sciences. Gamma Design Software, Plainwell: Michigan USA; 2008. URL: https://softbooks.pl/gammadesign/files/download/gsplususerguide.pdfRobertson G. P. GS+: Geostatistics for the Environmental Sciences. Gamma Design Software, Plainwell: Michigan USA; 2008. URL: https://softbooks.pl/gammadesign/files/download/gsplususerguide.pdfFortescue J. A. C. Landscape geochemistry-retrospect and prospect–1990. Applied Geochemistry. 1992;7(1):1–53. https://doi.org/10.1016/0883-2927(92)90012-RFortescue J. A. C. Landscape geochemistry-retrospect and prospect–1990. Applied Geochemistry. 1992;7(1):1–53. https://doi.org/10.1016/0883-2927(92)90012-R

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