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Acta Geologica Sinica(English Edition) 2016年第2期90卷 757-758页

作者： LAI Anqi LI Zhe liu xuelong LI Yang Faculty of Land and Resource Engineering Kunming University of Science and Technology Kunming 650093 China Yunnan Geological Engineering Prospecting General Corporation Kunming 650051 China

Objective The Late Cretaceous Xiuwacu ore-bearing porphyry is located in the Geza area of southern Yidun arc, SW China. In this area, the rock mass is mainly composed of three lithofacies： biotite granite porphyry, monzonitic granite and light alkali feldspar granite. As a part of the Yidun arc, the Geza arc has common structure and temporal- spatial evolution with the ~idun arc, which has experienced three stages of oceanic crust subduction, collision orogeny and intracontinent convergence stages. The molybdenite ores in the area are mainly hosted in monzonitic granite-porphyry and structural fracture zone, and the ore bodies are strictly controlled by faults. In recent years, great geological prospecting results have been achieved in Xiuwacu, and the deposit has reached a medium scale. However, there are few researches on the metallogenic porphyry. Based on the previous research, we determined the rock-forming and ore-forming age of the porphyry, and found that there were two stages of magmatism intrusion in Xiuwacu： Indosinian and Yanshanian. We also discussed the geochemical characteristics and source area of the rocks in the area.

关键词： Hf Constraints from Lithogeochemistry Petrogenesis and Tectonic Significance of the Xiuwacu Two-Period Magmatism in Geza Arc of Yunnan Province Zircon U-Pb Geochronology and Hf isotopic Compositions Pb

The Yanshanian Granites and Associated Mo-Polymetallic Mineralization in the Xiangcheng-Luoji Area of the Sanjiang-Yangtze Conjunction Zone in Southwest China

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Acta Geologica Sinica(English Edition) 2014年第6期88卷 1742-1756页

作者： LI Wenchang YIN Guanghou YU Haijun liu xuelong Yunnan Bureau of Geological Survey Faculty of Land and Resource Engineering Kunming University of Science and Technology

The Xiangcheng-Luoji area is located in the conjunction of the southern part of the ＂Sanjiang＂ mineralization belt and the west margin of Yangtze craton. The geological studies were carried out to know the Indosinian large porphyry Cu polymetallic deposits. Recent studies revealed that the area existed in the superposition of Late Yanshanian acidic intrusive rock belt and developed Mo-Cu polymetallic mineralization where promising exploration results have been achieved. Through the systematic study of geochronology, formation age of the Renlin Mo-minieralization monzogranite is 81.7±1.1 Ma. Re-Os dating results concentrate on 82.34±1.2–88.27±1.23 Ma for the model ages of molbdenite of Tongchanggou Mo deposits, average age is 85 ± 2 Ma where seven data points constitute a good isochron which shows that they were the same period products of mineralization. Geochemical features shown that the rocks have a high content of SiO 2（66.59–77.36wt%）, alkaline-rich（K2O=2.68–6.08wt%; Na2O=0.50–4.91wt%; K2O/Na2 O ratios are 0.71–5.56, where average ratio of 1.89） and have aluminum–rich features（Al2O3 10.38–15.15wt%） with σ values less than 3.3. Which indicate that they belong to the high-K calc-alkali to shoshonite series. Geochemistry of Yanshanian intrusions shows that rocks are enrich in LREE with obvious negative δEu anomalies, enrichment of trace elements like, LILE elements（Rb, Th, Ba） with a relative loss of Ba, and loss of high field strength elements（Nb, Ta, P, Ti） and HREE elements. The granite genetic classification diagram shows that the granites belong to A-type granite and formatted in syn-collision tectonic environment. Meanwhile, the Yanshanian granites also inherited the characteristics of island arc environment which formed in the process of crustal melting caused by upwelling of asthenospheric substances in the extensional tectonic background. The process of partial melting existed substances from the deep（lower crust or upper mantle） which have been added. In

关键词： porphyry Mo deposit mineralization A-type granite Yanshanian Xiangcheng-Luoji area Sanjiang("Three-River")

Big data:new methods and ideas in geological scientific research

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Big Earth Data 2019年第1期3卷 1-7页

作者： Zhang Qi liu xuelong Institute of Geology and Geophysics Chinese Academy of SciencesBeijingChina Faculty of Land and resource Engineering Kunming University of Science and TechnologyKunmingChina

Big data research is a developing field that is bringing change to people’s *** data is an inevitable outcome of the development of science:scientific research has resulted in the accumulation of a large amount of data and conventional methods cannot handle such massive amounts of ***,alternatives such as big data,cloud computing,artificial intelligence,and blockchain have emerged.

关键词： handle artificial Big

The Late Cretaceous Crustal Magmatism of the Geza Arc Metallogenic Belt in Yunnan Province,and Zircon Ages and Hf Isotopic Evidence of the Porphyry Cu-Mo Mineralization

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 355-356页

作者： YANG Fucheng LI Wenchang liu xuelong WANG Shuaishuai Faculty of Land and Resource Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China Chengdu Geological Survey Center of China Geological Survey Chengdu 610081 Sichuan China

Objective The Geza arc in Yunnan Province,located in the southern Yidun arc,is an important part of the Sanjiang tectonic-magmatic belts in southwestern China and is a newly discovered copper polymetallic ore-concentrating *** studies show that the newly discovered Yanshanian porphyry Cu-Mo polymetallic mineralization superimposed in the Indosinian porphyry copper belt in this area.

关键词： Hf The Late Cretaceous Crustal Magmatism of the Geza Arc Metallogenic Belt in Yunnan Province,and Zircon Ages and Hf Isotopic Evidence of the Porphyry Cu-Mo Mineralization Mo Cu

Post-ore Modification and Preservation of the Indosinian Porphyry Copper Deposit in Geza Arc, Yunnan, SW China

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 755-756页

作者： liu xuelong LI Wenchang ZHANG Na LAI Anqi LI Zhe Kunming University of Science and Technology Kunming 650093 Yunnan China Yunnan Geological Survey Kunming 650051 Yunnan China

Objective The post-ore modification and preservation of porphyry copper deposits is controlled and influenced by various geological processes, and the regional uplift and denudation is the most important factors. This study used biotite mineral geobarometer and Apatite Fission Track （AFT） to restore the uplift evolution of the granitic porphyries in the Geza arc and to obtain quantitative data of rock erosion degree and denudation rate.

关键词： Post-ore Modification and Preservation of the Indosinian Porphyry Copper Deposit in Geza Arc SW China Yunnan

Zircon U-Pb Ages of the Muchang Alkali Granites in Zhenkang Block, Western Yunnan: Implication for the Time Limit on Tectono-Magmatic Activities

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1152-1153页

作者： YANG Fucheng LI Wenchang liu xuelong WANG Shuaishuai YANG Yunkai GU Youwei LUO Ying Faculty of Land and Resource Engineering Kunming University of Science and TechnologyKunming 650093China Chengdu Geological Survey Center of China Geological Survey Chengdu 610081China Mingguang Mining Co. Ltd.Baoshan 679100China Yunnan Gold Mining Group Co. LtdKunming 650200China

Objective The Luziyuan super-large Pb-Zn-Fe polymetallic ore district is located in the southern section of the Baoshan-Zhenkang block,which is an important part of the Pb-Zn-Cu-Fe-Sn-Au polymetallic metallogenic belt... 详细信息

关键词： Pb Zn Block

Exhumation of the Late Cretaceous Ore-forming Porphyries in Zhongdian Area,Northwestern Yunnan:Evidence from Fission Track Analysis

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Acta Geologica Sinica(English Edition) 2021年第5期95卷 1786-1787页

作者： liu xuelong YANG Zhiming LU Yingxiang ZHANG Na DONG Leilei JIAO Qianqian CHEN Jianhang YANG Fucheng Kunming University of Science and Technology Kunming 650093China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Yunnan Geological Survey Kunming 650051China China University of Geosciences Beijing 100083China

Objective The Zhongdian area,Yunnan Province,is located in the southern of the Yidun Island arc belt in the TethysHimalayan metallogenic area,and is one of the important copper polymetallic mineral resource bases in *** on the previous studies(liu et al.,2014),this paper discusses the Late Cretaceous tectono-thermal events in Zhongdian,to reconstruct the framework of their evolution and to restore the uplift history of representative ore-forming porphyries.

关键词： Cretaceous China. bases

Effect of Pre-corrosion on Fatigue Life of High Strength Steel 38CrMoAl

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Journal of Wuhan University of Technology(Materials Science) 2011年第4期26卷 648-653页

作者：刘建华 School of Materials Science and Engineering Beihang University

The effect of pre-corrosion on fatigue behavior of high strength steel 38CrMoAl was investigated with a fatigue test method using the accelerated pre-corrosion specimen in the neutral salt spray environment. The methods of weight-loss and energy dispersive spectrum （EDS） were adopted. The corrosion weight-loss rate was fitted with the test time using power law, and the relationship between the corrosion weight-loss rate and the time was formulated. Moreover, the fatigue behaviors of the steel for different pre-corrosion time were investigated by the axis-direction tensile fatigue test. The fatigue life distribution characteristics of the pre-corrosion specimens were studied using the statistical probability methods, and the mathematical expectations and the standard tolerances of the material fatigue lives after different pre-corrosion time were obtained. It was found that the crack initiation of the high strength steel was accelerated by the preferential corrosion at the local plastic deform areas. The fatigue life obeys the lognormal distribution perfectly. Furthermore, within the common time range of the engineering, the standard tolerances of the logarithm of the fatigue life were independent of the pre-corrosion time.

关键词： pre-corrosion fatigue life 38CrMoAl steel

Comparative study of big data of global adakites and mineralization-related granite in the Geza arc metallogenic belt, northwest Yunnan, Southwest China

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Big Earth Data 2018年第3期2卷 268-281页

作者： liu xuelong Li Wenchang Zhang Qi Zhang Na Zhang Changzhen Luo Ying Wang Shuaishuai Yang Fucheng Chen Jianhang Li Zhenhuan Faculty of Land and Resource Engineering Kunming University of Science and TechnologyKunmingChina Key Laboratory of Geological Information Technology Ministry of Natural Resources of the People’s Repbulic of ChinaBeijingChina Chengdu Geological Survey Center China Geological SurveyChengduChina Institute of Geology and Geophysics Chinese Academy of SciencesBeijingChina

The Geza arc is an important part of the Sanjiang tectono-magmatic belt and is a newly discovered copper polymetallic ore concentration area in northwest Yunnan province,Southwest *** area comprises numerous metal ore deposits,including one super-largedeposit,three large deposits,*** formation of these deposits was closely related to intermediate–acidic magmatic *** on previous studies,the“big data”analysis technique was used for a comparative study of large geochemical datasets of granite related to ore-formation in the Geza porphyry copper deposit and global *** a result,1313 element combinations and 127,765 overlap ratios were *** results show that the Geza porphyry has similar geochemical characteristics to global adakites(the ratios of REE and Ga to major elements are in the range of global adakites).However,theCu,Mo,and Zn contents of the porphyry are significantly higher than those of global adakites,and the porphyry may,therefore,represent an end-member of the global range of adakite *** addition,the geochemistry of adakites associated with the porphyry copper deposits overlaps in part with that of global adakites,although most of the data lie outside of the range of global adakites(***/Cu,Sr/Cu,Na/Cu,and Zr/Cu values,and high Th/Cu,Ba/Cu,Na/Mo,Rb/Mo,Th/Mo,Ta/Mo,Ba/Mo,Mn/Zn,and Ba/Znvalues).The samples with characteristics that deviate significantly from the geochemistry of global adakites show more advanced mineralization and alteration,and a stronger relationship with Cu and *** results of geochemical data mining can be used as a prospecting indicator,and provide a new scientific basis for geological prospecting of the deep levels and per-iphery of the Geza Cu polymetallic ore belt.

关键词： Porphyry Cu deposit granite adakite geochemistry confidence ellipses overlapping ratio geological big data Sanjiang area

Meta Model and Optimization Method for Automobile Styling and Aerodynamic Perfor Mance Development in Early Design Stage

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Meta Model and Optimization Method for Automobile Styling an...