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| 1 | GeoPyTool:A cross-platform software solution for common geological calculations and plots显示文摘GeoPyTool is an open source application developed for geological calculations and plots,such as geochemical classification,parameter calculation,basic statistical analysis and diagrams for structural geology.More than acting as a link from raw data stored in Microsoft Excel■(MS Excel)files to vector graphic files,GeoPyTool includes recently developed routines that have not been included in previous software,such as the calculation of the Ce(Ⅳ)/Ce(Ⅲ)ratio for zircons as a method to examine the temporal evolution of oxygen fugacity in the magmatic source for igneous rocks,and the temperature calculator with titanium in zircon and zirconium in rutile.Besides these routines,GeoPyTool also allows users to load any figure from articles or books as a base map.As a Python-based crossplatform program,GeoPyTool works on Windows?,MacOS X?and GNU/Linux.GeoPyTool can do the whole process from data to results without the dependence of Microsoft Excel?,CorelDraw?and other similar software.It takes Excel?XLSX and CSV(Comma Separated Value)as the formats of both the input data source files and the output calculation results files.The figures generated by GeoPyTool can be saved as portable network graphics(PNG),scalable vector graphics(SVG)or portable document format(PDF).Another highlight of GeoPyTool is the multilingual support,the official versio n of GeoPyTool supports both Chinese and English,and additional languages can be loaded through interface files.GeoPyTool is still in the development stage and will be expanded with further geochemical and structural geology routines.As an open source project,all source code of GeoPyTool are accessible on Github(http://gffzz188fe103f8f1460as556n6p95fq5o6o0k.ffgz.tsg.suse.edu.cn/GeoPyTool/GeoPyTool).Users with Python experience can join in the development team and build more complex functions expanding the capabilities of GeoPyTool. | Qiu-Ye Yu Leon Bagas Ping-Hua Yang Da Zhang | 2019 | Geoscience Frontiers2019，10，4： | 3 |
| 2 | Geochemistry and Sr-Nd-Pb Isotopes of the Granites from the Hashitu Mo Deposit of Inner Mongolia, China: Constraints on Their Origin and Tectonic Setting显示文摘The Hashitu molybdenum deposit is located in the southern part of the Great Hinggan Range,NE China.Molybdenum mineralization is hosted by and genetically associated with monzogranite and porphyritic syenogranite.Sr-Nd-Pb isotopes of the intrusions show that the porphyritic syenogranite has initial^(87)Sr/^(86)Sr ratios of 0.70418-0.70952,ε_(Nd)(t)values of 1.3 to 2.1(t=143Ma),^(206)Pb/^(204)Pb ratios of 19.191-19.573,^(207)Pb/^(204)Pb ratios of 15.551-15.572,and^(208)Pb/^(204)Pb ratios of38.826-39.143.The monzogranite has initial^(87)Sr/^(86)Sr ratios of 0.70293-0.71305,ε_(Nd)(t)values of 1.1 to2.0(t=147 Ma),^(206)Pb/^(204)Pb ratios of 19.507-20.075,^(207)Pb/^(204)Pb ratios of 15.564-15.596,and^(208)Pb/^(204)Pb ratios of 39.012-39.599.The calculated Nd model ages(T_(DM))for monzogranite and porphyritic syenogranite range from 866 to 1121 Ma and 795 to 1020 Ma,respectively.The granitic rocks in the Hashitu area have the same isotope range as granites in the southern parts of the Great Hinggan Range.The isotope composition indicates that these granites are derived from the partial melting of a juvenile lower crust originating from a depleted mantle with minor contamination by ancient continental crust.The integrating our results with published data and the Late Mesozoic regional tectonic setting of the region suggest that the granites in the Hashitu area formed in an intra-continent extensional setting,and they are related to the thinning of the thickened lithosphere and upwelling of the asthenosphere. | DING Chengwu DAI Pan BAGAS Leon NIE Fengjun JIANG Sihong WEI Junhao DING Chengzhen ZUO Pengfei ZHANG Ke | 2016 | Acta Geologica Sinica(English Edition)2016，90，1： | 3 |
| 3 | The relationship between gold mineralization, exhumation of metamorphic core complex and magma cooling: Formation of the Anjiayingzi Au deposit, northern North China Craton显示文摘 | Lebing Fu Junhao Wei Huayong Chen Leon Bagas Jun Tan Huan Li Daohan Zhang Ning Tian | 2014 | Ore Geology Reviews2014，，： | 1 |
| 4 | Zircon SHRIMP U–Pb geochronology of potassic felsic intrusions in western Yunnan, SW China: Constraints on the relationship of magmatism to the Jinsha suture显示文摘 | Yong-jun Lu Robert Kerrich Peter A. Cawood T. Campbell McCuaig Craig J.R. Hart Zheng-xiang Li Zeng-qian Hou Leon Bagas | 2011 | Gondwana Research2011，，2： | 1 |
| 5 | Geodynamic setting of the Zijinshan porphyry–epithermal Cu–Au–Mo–Ag ore system, SW Fujian Province, China: Constrains from the geochronology and geochemistry of the igneous rocks显示文摘 | Si-Hong Jiang Qing-Ling Liang Leon Bagas Shao-Huai Wang Feng-Jun Nie Yi-Fei Liu | 2013 | Ore Geology Reviews2013，，： | 1 |
| 6 | A review of Australia's Proterozoic mineral systems and 'genetic models 显示文摘 | Pirajno Franco Bagas Leon | 2008 | Precambrian Research2008，166，14： | 1 |
| 7 | Archean (about 2500 Ma) anatexis in eastern North China Block显示文摘Two Neoarchean alkaline feldspar-rich granites sourced from partially melted granulite-facies granodioritic orthogneiss have been here recognised in the eastern part of the North China Block(NCB).These poorly foliated granites have previously been assumed to be Mesozoic in age and never dated,and so their significance has not been recognised until now.The first granite(AG1)is a porphyritic syenogranite with megacrystic K-feldspar,and the second(AG2)is a quartz syenite with perthitic megacryst.Zircons from the granites yield LA-ICP-MS U-Pb ages of 2499±10 Ma(AG1),and 2492±28 Ma(AG2),which are slightly younger than the granodioritic orthogneiss that they intrude with a crystallisation U-Pb age of 2537±34 Ma.The younger granites have higher assays for SiO_(2)(71.91%for AG1 and 73.22%for AG2)and K_(2)O(7.52%for AG1 and 8.37%for AG2),and much lower assays for their other major element than the granodioritic orthogneiss.All of the granodioritic orthogneiss and granite samples have similar trace element patterns,with depletion in Th,U,Nb,and Ti and enrichment in Rb,Ba,K,La,Ce,and P.This indicates that the granites are derived from the orthogneiss as partial melts.Although they exhibit a similar REE pattern,the granites have much lower total REE contents(30.97×10^(−6) for AG1,and 25.93×10^(−6) for AG2),but pronounced positive Eu anomalies(Eu/Eu^(*)=8.57 for AG1 and 27.04 for AG2).The granodioritic orthogneiss has an initial ^(87)Sr/^(86)Sr ratio of 0.70144,εNd(t)value of 3.5,and εHf(t)values ranging from−3.2 to+2.9.The orthogneiss is a product of fractional crystallisation from a dioritic magma,which was derived from a mantle source contaminated by melts derived from a felsic slab.By contrast,the AG1 sample has an initial ^(87)Sr/^(86)Sr ratio of 0.6926 that is considered too low in value,εNd(t)value of 0.3,andεHf(t)values between+0.57 and+3.82;whereas the AG2 sample has an initial ^(87)Sr/^(86)Sr ratio of 0.70152,εNd(t)value of 1.3,andεHf(t)values between+0.5 and+14.08.These assays indicate that a Sr-Nd-Hf isotopic disequilibrium exists between the granite and granodioritic orthogneiss.The elevatedεHf(t)values of the granites can be explained by the involvement of Hf-bearing minerals,such as orthopyroxene,amphibole,and biotite,in anatectic reactions in the granodioritic orthogneiss.Based on the transitional relationship between the granites and granodioritic orthogneiss and the geochemical characteristics mentioned above,it is concluded that the granites are the product of rapid partial-melting of the granodioritic orthogneiss after granulite-facies metamorphism,and their crystallisation age of about 2500 Ma provides the minimum age of the metamorphism.This about 2500 Ma tectonic-metamorphic event in NCB is similar to the other cratons in India,Antarctica,northern and southern Australia,indicating a possible connection between these cratons during the Neoarchean. | Si-hong Jiang Leon Bagas Yi-fei Liu Li-li Zhang | 2021 | China Geology2021，4，2： | 1 |
| 8 | Late Jurassic Intracontinental Extension and Related Mineralisation in Southwestern Fujian Province of SE China:Insights from Deformation and Syn-Tectonic Granites显示文摘Late Mesozoic igneous intrusions and extensional structures in Carboniferous to Permian sequences in the SW Fujian region acted as important controls on the localisation of Fe-polymetallic de-posits.Here we document the identification of extensional deformation at shallow crustal levels and syn-tectonic granites related to normal faults.Based on spatial distribution and structural features,the extensional deformation can be divided into cover-only and basement-intersecting styles.A series of syn-tectonic plutons were emplaced into the footwall of normal faults.Representative samples of the Tangquan Granite have high SiO2(66.4 wt.%-73.9 wt.%)assays and Mg#values(37-59).The samples also have relatively homogenous initial 87Sr/86Sr(0.7083-0.7089)andεNd(-9.2--10.2)values.Geochemical and isotopic evidences indicate that the Tangquan granite originates from a hybrid source including lower crustal-derived felsic and lithospheric mantle-derived mafic magmas.Zircon U-Pb dating indicates that the granodiorite phase from the pluton crystallised at 161±4 Ma and the monzogranite phase crystallised at 159±1 Ma.Combined with the granitic rocks in a wider region of SE China,the widespread granitic magmatism and polymetallic mineralisation have been synchronous during the Late Mesozoic,probably resulting from extensional tectonics related to the lithospheric thinning. | Rui Cao Xinghua Ma Leon Bagas Yongbao Gao Demin Liu Zailai Mou | 2021 | Journal of Earth Science2021，32，1： | 1 |
| 9 | Gold and silver metallogeny of the South China Fold Belt:a consequence of multiple mineralizing events显示文摘 | Franco Pirajno Leon Bagas | 2002 | Ore Geology keviews2002，20，： | 1 |
| 10 | Oldhamite:a new link in upper mantle for C-O-S-Ca cycles and an indicator for planetary habitability显示文摘In the solar system,oldhamite(CaS)is generally considered to be formed by the condensation of solar nebula gas.Enstatite chondrites,one of the most important repositories of oldhamite,are believed to be representative of the material that formed Earth.Thus,the formation mechanism and the evolution process of oldhamite are of great significance to the deep understanding of the solar nebula,meteorites,the origin of Earth,and the C-O-S-Ca cycles of Earth.Until now,oldhamite has not been reported to occur in mantle rock.However,here we show the formation of oldhamite through the reaction between sulfide-bearing orthopyroxenite and molten CaCO3 at 1.5 GPa/1510 K,0.5 GPa/1320 K,and 0.3 GPa/1273 K.Importantly,this reaction occurs at oxygen fugacities within the range of upper-mantle conditions,six orders of magnitude higher than that of the solar nebula mechanism.Oldhamite is easily oxidized to CaSO4 or hydrolysed to produce calcium hydroxide.Low oxygen fugacity of magma,extremely low oxygen content of the atmosphere,and the lack of a large amount of liquid water on the celestial body’s surface are necessary for the widespread existence of oldhamite on the surface of a celestial body otherwise,anhydrite or gypsum will exist in large quantities.Oldhamites may exist in the upper mantle beneath mid-ocean ridges.Additionally,oldhamites may have been a contributing factor to the early Earth’s atmospheric hypoxia environment,and the transient existence of oldhamites during the interaction between reducing sulfur-bearing magma and carbonate could have had an impact on the changes in atmospheric composition during the Permian-Triassic Boundary. | Yuegao Liu I-Ming Chou Jiangzhi Chen Nanping Wu Wenyuan Li Leon Bagas Minghua Ren Zairong Liu Shenghua Mei Liping Wang | 2023 | National Science Review2023，10，10： | 0 |
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