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Delineation of Integrated Anomaly with Generative Adversarial Networks and Deep Neural Networks in the Zhaojikou Pb-Zn Ore District,Southeast China

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Acta Geologica Sinica(English Edition) 2023年第4期97卷 1252-1267页

作者： DUAN Jilin LIU Yanpeng ZHU Lixin MA Shengming GONG Qiuli alla dolgopolova Simone A.LUDWIG School of Earth Sciences East China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Development Research Centre China Geological SurveyBeijing 100037China Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesLangfang 065000China Department of Earth Sciences Natural History MuseumLondon SW75BDUnited Kingdom Department of Computer Science North Dakota State UniversityFargo ND 58105USA

Geochemical maps are of great value in mineral *** geochemical anomaly maps provide comprehensive information about mapping assemblages of element concentrations to possible types of mineralization/ore,but vary depending on expert's knowledge and *** paper aims to test the capability of deep neural networks to delineate integrated anomaly based on a case study of the Zhaojikou Pb-Zn deposit,Southeast *** hundred fifty two samples were collected,and each sample consisted of 26 variables covering elemental composition,geological,and tectonic *** first,generative adversarial networks were adopted for data ***,DNN was trained on sets of synthetic and real data to identify an integrated ***,the results of DNN analyses were visualized in probability maps and compared with traditional anomaly maps to check its *** showed that the average accuracy of the validation set was 94.76%.The probability maps showed that newly-identified integrated anomalous areas had a probability of above 75%in the northeast *** also showed that DNN models that used big data not only successfully recognized the anomalous areas identified on traditional geochemical element maps,but also discovered new anomalous areas,not picked up by the elemental anomaly maps previously.

关键词： deep learning deep neural networks generative adversarial networks geochemical map Pb-Zn deposit

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The Muruntau gold deposit(Uzbekistan)--A unique ancient hydrothermal system in the southern Tien Shan

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Geoscience Frontiers 2016年第3期7卷 495-528页

作者： Ulf Kempe Torsten Graupner Reimar Seltmann Hugo de Boorder alla dolgopolova Maarten Zeylmans van Emmichoven Institut fur Mineralogie TU Bergakademie Freiberg Brennhausgasse 14 09596 Freiberg Germany Federal Institute for Geosciences and Natural Resources (BGR) Stilleweg 2 30655 Hannover Germany Centre for Russian and Central EurAsian Mineral Studies (CERCAMS) Department of Earth Sciences Natural History Museum Cromwell Road London SW7 5BD UK Faculty of Geosciences Utrecht University Heidelberglaan 2 3584 CS Utrecht The Netherlands

The Muruntau gold deposit in the Central Kyzylkum,Uzbekistan is one of the largest single gold deposits *** available from the literature are reviewed with the aim to（1） integrate the present knowledge on this unique deposit from Russian and English literature;（2） show the considerable progress made in the understanding of the genesis of the Muruntau deposit during the last decades;and（3） point to problems still open for future *** formation occurred through a multi-stage process involving sedimentation,regional metamorphism including thrusting,magmatism with formation of hornfels aureoles and several stages of hydrothermal *** to recent knowledge,synsedimentary or pure metamorphic formation of gold mineralization seems *** role of granite magmatism occurring roughly within the same time interval as the main hydrothermal gold precipitation remains *** are no signs of interaction of matter between the magma（s） and the hydrothermal system（s）.On the other hand,there was an intense,high-temperature（above 400 ℃）fluid- wall rock interaction resulting in the formation of gold-bearing,cone-like stockworks with veins,veinlets and gold-bearing *** chemical and isotope indicators hint at an involvement of lower-crustal or mantle-related sources as well as of surface waters in ore *** formation through brecciation involving explosion,hydrothermal or tectonic breccias might explain these *** investigations on breccia formation as well as on the exact timing of relevant sedimentary,metamorphic,magmatic and hydrothermal events are recommended.

关键词： Muruntau Gold deposit Fluid inclusions Isotope data Gold composition

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Adakite-like granitoids of Songkultau:A relic of juvenile Cambrian arc in Kyrgyz Tien Shan

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Geoscience Frontiers 2021年第1期12卷 147-160页

作者： D.Konopelko R.Seltmann A.dolgopolova I.Safonova S.Glorie J.De Grave M.Sun St.Petersburg State University 7/9 University EmbankmentSt.Petersburg199034Russia Novosibirsk State University 1 Pirogova St.Novosibirsk630090Russia Natural History Museum Centre for Russian and Central EurAsian Mineral Studies(CERCAMS)LondonSW75BDUK Sobolev Institute of Geology and Mineralogy SB RAS Koptyuga Ave.3Novosibirsk630090Russia Department of Earth Sciences School of Physical SciencesThe University of AdelaideSA5005Australia Department of Geology Ghent UniversityKrijgslaan 281/S8B-9000GhentBelgium Department of Earth Sciences The University of Hong KongPokfulam RoadHong KongChina

The early Paleozoic Terskey Suture zone,located in the southern part of the Northern Tien Shan domain in Kyrgyzstan,comprises tectonic slivers of dismembered ophiolites and associated primitive volcanics and deepmarine *** the Lake Songkul area,early-middle Cambrian pillow basalts are crosscut by the Songkultau intrusion of coarse-grained gneissose quartz diorites and tonalites with geochemical characteristics typical for high-SiO2 adakites(SiO2>56 wt.%,Al2O3>15 wt.%,Na2 O>3.5 wt.%and high Sr/Y and La/Yb ratios).The Songkultau granitoids have positive initialεNd(+3.8 to+6.4)andεHf(+12.3 to+13.5)values indicating derivation from sources with MORB-like isotopic *** formations,surrounding the Songkultau intrusion,have geochemical affinities varying from ocean floor to island arc *** rock assemblage is interpreted as a relic of an early-middle Cambrian primitive arc where the adakite-like granitoids were derived from partial melting of young and hot subducted oceanic *** age of 505 Ma,obtained for the Songkultau intrusion,shows that hot subduction under the Northern Tien Shan continued until middle *** primitive arc complexes were obducted onto the Northern Tien Shan domain,where the Andean type continental magmatic arc developed in Cambrian and *** of the Andean type arc was accompanied by uplift,erosion and deposition of coarse clastic sediments.A depositional age of ca.470 Ma,obtained for the gravellites in the Lake Songkul area,is in agreement with the timing of deposition for lower Ordovician conglomerates elsewhere in the Northern Tien Shan,and corresponds to the main phase of the Andean type *** Songkultau adakites in association with surrounding ocean floor and island arc formations constitute a relic of a primitive Cambrian arc and represent a juvenile domain of substantial size identified so far within the predominantly crustal-derived terranes of Tien *** a regional scale this primit

关键词： Northern Tien Shan(Tianshan) Terskey suture Adakite Cambrian juvenile arc

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