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Late Triassic Magma Mixing and Fractional Crystallization in the Qingchengzi Orefield,Eastern Liaoning Province:Regional Petrogenetic and Metallogenic Implications

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Journal of Earth Science 2021年第1期32卷 144-157页

作者： Hongjing Xie Yuwang Wang Dedong Li guochao zhou Zhichao Zhang Beijing Institute of Geology for Mineral Resources Beijing 100012China Deep Exploration Technic Center for Non-Ferrous Mines Beijing 100012China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China

The Qingchengzi orefield is an important Pb-Zn-Au-Ag polymetallic orefield in NE *** Indosinian magmatism has formed the Shuangdinggou batholith and the Xinling stock,as well as dikes of quartz monzonite porphyry and *** to petrographic characteristics,the Shuangdinggou intrusion can be divided into the main suite and the central *** U-Pb dat-ing yielded crystallization ages of 215.0-220.9 Ma for these various Qingchengzi magmatic units,which are within analytical error and represent coeval *** Shuangdinggou main suite contains abundant mafic microgranular enclaves(MMEs)and shows features of magma ***,the major oxide contents of the MMEs and their quartz monzonite host show well-defined linear frac-tionation *** REE and trace element patterns of the MMEs and their host are similar,which demonstrates certain degree of geochemical homogenization between the two during magma *** Shuangdinggou main suite shares similar geochemical characteristics with typical high Ba-Sr gra-nites(Ba=1082 ppm-2051 ppm,Sr=803 ppm-886 ppm),and was likely originated from the mixing between a melt derived from partial melting of the thickened lower crust and the enriched *** central suite was likely formed by fractional crystallization of the main-suite *** Xinling in-trusion may represent a branch of the Shuangdinggou intrusion and has the same genesis as the central *** quartz monzonite porphyries geochemically mimic the Shuangdinggou main suite,and may also be an epioic facies of the Shuangdinggou *** MMEs and lamprophyres may have been derived from incomplete magma *** of the Pb-Zn and Au-Ag deposits in the Qing-chengzi orefield may have been related to the granite/quartz monzonite porphyries near the Shuangdinggou intrusion,which were formed by magma mixing and fractional crystallization.

关键词： Qingchengzi orefield Shuangdinggou intrusion magma mixing mafic microgranular enclave(MME) fractional crystallization

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Petrogenesis and Economic Potential of the Sangong MaficUltramafic Intrusion in the Eastern Tianshan, Central Asian Orogenic Belt: Constraints from Mineral, Whole-Rock, and PGE Geochemistry

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Journal of Earth Science 2024年第3期35卷 850-865页

作者： guochao zhou Yuwang Wang Jingbin Wang Yu Shi Hongjing Xie Dedong Li Yong Fu Pan Wu College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550012China Technic Research Center for Deep Resources Exploration in Non-ferrous Metal Mines Beijing Institute of Geology for Mineral Resources Co.Ltd.Beijing 100012China Sino-Zijin Resources Ltd. Beijing 100012China State Key Laboratory of Nuclear and Environment East China University of TechnologyNanchang 330013China

The Sangong Cu-Ni sulfide mineralized mafic-ultramafic intrusion is located on the southern margin of the Bogeda-Harlik belt,eastern Tianshan,*** intrusion is a well-differentiated complex and is comprised of leucogabbro,gabbro,olivine gabbro,Pl-bearing peridotite,and Pl-bearing *** Pl-bearing pyroxenite hosts both irregularly disseminated sulfide and round droplet *** intrusive rocks have a wide range of SiO_(2)(42.1 wt.%-50.48 wt.%)and MgO(6.21 wt.%-22.11 wt.%),and are enriched in light rare earth elements(LREE),large-ion lithophile elements(LILE;e.g.,Rb,Ba,Sr,and Pb),and palladium platinum group elements(PPGE)but depleted in high-field-strength elements(HFSE;e.g.,Nb,Ta,and Ti)and iridium PGEs(IPGE).These geochemical characteristics indicate that the Sangong mafic-ultramafic intrusion was derived from high degree of partial melting of depleted mantle and interacted with subduction-related *** low Pd/Ir(3.21-27.44)but high Ni/Cu(1.64-24.16)ratios,combined with the olivine crystals with low Fo(60.88-78.65)and Ni(54.99 ppm-1688.87 ppm)concentrations suggest that the parental magma of the Sangong intrusion were likely high MgO basaltic in composition that experienced extensive evolution prior *** Ce/Pb ratios(5.8-13.6)and Nb/U ratios(11.6-30.3)of the intrusive rocks all range between MORB and crustal values,the Nb/Yb and Th/Yb values are close to the lower crust values,together with the low Se/S ratios[(17-100)×10^(-6))]suggest that the magma experienced assimilation not only in mantle source but also in conduit,but the degree of crustal contamination is *** Cu/Pd ratios of the rocks range from 3.9×10^(4) to 10.8×10^(4),and the Cu/Zr ratios of Pl-bearing pyroxenite in the Sangong intrusion are>1,combined with the presence of sulfide droplets in the Pl-bearing pyroxenite,indicating the parental magma experienced sulfide saturation and the economical ore bodies may present in the depth of the ***,gi

关键词： Sangong mafic-ultramafic intrusion deposits geochemistry PGE economic potential eastern Tianshan.

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Physicochemical Control of the Early Permian Xiangshan Fe-Ti Oxide Deposit in Eastern Tianshan(Xinjiang),NW China

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Journal of Earth Science 2018年第3期29卷 520-536页

作者： Yu Shi Yuwang Wang Jingbin Wang Lutong Zhao Hongjing Xie Lingli Long Tao Zou Dedong Li guochao zhou Beijing Institute of Geology for Mineral Resources Beoing 100012China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China

The Xiangshan mafic-ultramafic complex is one of the major Early Permian maficultramafic intrusions in eastern Tianshan （Xinjiang, NW China）, and consists of two major intrusive phases. The first intrusive phase is mainly gabbroic rocks hosting ilmenite mineralization, while the second intrusive phase is mainly lherzoilite associated with Ni-Cu sulfide mineralization. The Xiangshan ilmenite orebodies hosted in the Fe-Ti oxide-bearing gabbro occur along the contact between hornblende gabbros and leucogabbros. The hornblende gabbros and Fe-Ti oxide rich gabbros at Xiangshan are newly dated to be Early Permian （280.1 and 279.2 Ma, respectively）. Major and trace element compositions of zircons and whole rocks from Xiangshan hornblende gabbro and Fe-Ti oxide gabbro have been measured by in situ excimer laser ablation ICP-MS. Zircon Ce^4＋/Ce^3＋ ratios based on lattice-strain model and Ti-in-zircon temperatures of hornblende gabbro and Fe-Ti oxide gabbro of the Xiangshan complex are calculated to evaluate the physicochemical variations during the ilmenite mineralization. Whole-rock geochemistry and zircon trace element geochemistry suggest that Fe-Ti oxide gabbros were formed from a basaltic parent magma which had undergone a transfromation from being H2O-rich to H2O-poor. During the magmatic evolution, primitive, HEO-poor basaltic melts may have been replenished into the system, increasing its solidus temperature and decreasing its oxygen fugacity and H2O contents. This may have supperessed the Ti-rich poikilitic hornblende fractionation and promoted the plagioclase fractionation, which consequently concentrated the ore-forming components in the residual melts and generated the ilmenite mineralization.

关键词： eastern Tianshan magmatic Fe-Ti oxide deposits gabbros layered intrusion zircon U-Pb age geochemistry.

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Petrogenesis and Metallogenesis of the Niumaoquan Gabbroic Intrusion Associated with Fe-Ti Oxide Ores in the Eastern Tianshan, NW China

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 1862-1878页

作者： SHI Yu WANG Yuwang WANG Jingbin XIE Hongjing MAO Qigui ZHAO Lutong LONG Lingli LI Dedong zhou guochao Beijing Institute of Geology for Mineral Resources Beijing 100012 China School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China

The Niumaoquan layered gabbroic intrusion is in the southern margin of the Central Asian Orogenic Belt in North Xinjiang, China, and hosts a Fe-Ti oxide deposit in its evolved gabbroic phases. In this paper, we report zircon U-Pb age, Sr-Nd-Hf isotopes, plagioclase chemistry, and whole-rock geochemistry of the Niumaoquan layered gabbroic intrusion. Zircon grains separated from an anorthosite sample analyzed by laser ablation inductively coupled plasma mass spectrometry yielded a concordia age of 314.7±0.74 Ma, indicating that the Niumaoquan ore-bearing gabbroic intrusion was emplaced during the Late Carboniferous. The olivine gabbro texture and plagioclase chemistry suggest that plagioclase was an early crystallized silicate phase that crystallized prior to olivine. Fractional crystallization and accumulation of plagioclase significantly controlled the evolution of the Niumaoquan gabbroic intrusion and contributed to the formation of anorthosite layers, causing metallogenic elements to become enriched in the residual melt. The Niumaoquan gabbroic intrusion is characterized by the enrichment of large ion lithophile elements and depletion of high field strength elements, positive zircon εHf（t） values（＋2.1 to ＋12.2）, positive εNd（t） values（＋3.3 to ＋5.2）, and low initial ^（87）Sr/^（86）Sr ratios（0.7039 to 0.7047）, suggesting that the parental magma was produced by interactions between metasomatized lithospheric mantle and depleted asthenospheric melts at an early post-collision stage. The Fe-Ti oxide mineralization of the Niumaoquan intrusion benefited from interactions between depleted asthenospheric melts and lithospheric mantle, and fractional crystallization of abundant plagioclase and magnesian minerals.

关键词： anorthosite chronology Fe-Ti oxide Niumaoquan Eastern Tianshan

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Zircon SIMS U-Pb Age of the Shaxinan Melagabbro, Eastern Tianshan and Constraints on Fe-Ti-V Oxide Mineralization

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2039-2040页

作者： SHI Yu WANG Yuwang WANG Jingbin MAO Qigui XIE Hongjing zhou guochao ZHU Jiangjian WEI Xiaofeng Lü Xiaoqiang Beijing Institute of Geology for Mineral Resources Beijing 100012 China School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China

Objective The late Paleozoic Fe-Ti-V oxide deposit of the eastern Tianshan is an important orthomagmatic deposit type in the Central Asia Orogenic Belt （CAOB）. A series of Fe-Ti -V oxide deposits and mineralized mafic-ultramafic intrusions have been recognized recently, such as those in Hongliangzi, Weiya, Yaxi, Shaxinan and Shaxi on the Central Tianshan massif, and Niumaoquan on the southern margin of the Harlik belt （Shi et al., 2018a）. Only a few Fe -Ti-V oxide deposits in the eastern Tianshan （e.g., Weiya and Niumaoquan） have been studied, and their chronology need to be further constrained for study of regional Fe-Ti- V oxide metallogenic mechanism and variation of mantlederived magmas during the orogenic process.

关键词： Pb Zircon SIMS U-Pb Age of the Shaxinan Melagabbro Fe Ti

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浅谈房屋建筑工程质量检测技术与监管

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工程质量 2014年第S2期32卷 324-325页

作者：周国朝张掖市建筑管理总站甘肃张掖734000

房屋建筑工程质量检测结果是工程质量管理的有效依据。应用公平、公正的手段为房屋建筑及市政工程质量提供科学、准确的检测数据,是保证工程质量的前提;采取积极有效的手段加强对工程质量检测市场的监管,是保证工程质量的重要手段。本... 详细信息

房屋建筑工程质量检测结果是工程质量管理的有效依据。应用公平、公正的手段为房屋建筑及市政工程质量提供科学、准确的检测数据,是保证工程质量的前提;采取积极有效的手段加强对工程质量检测市场的监管,是保证工程质量的重要手段。本文就如何提高房屋建筑及市政工程质量检测技术,强化检测市场监管进行了有益的探讨。

关键词：质量检测房屋建筑市场监管

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东天山黄山东和黄山西铜镍硫化物矿床含矿超镁铁岩的成岩‒成矿作用机制:来自斜长石成分的约束

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地球科学 2022年第9期47卷 3244-3257页

作者：石煜王玉往王京彬周国超王海东华理工大学核资源与环境国家重点实验室江西南昌330013 北京矿产地质研究院有限责任公司北京100012 中色紫金地质勘查(北京)有限责任公司北京100012 贵州大学资源与环境工程学院贵州贵阳550025

东天山黄山东和黄山西镁铁‒超镁铁岩是区域早二叠世大规模幔源岩浆作用的产物,赋存有两个大型岩浆铜镍硫化物矿床.黄山东和黄山西矿床的主要矿体均赋存于超镁铁岩中,其含矿超镁铁岩的成因机制研究对揭示区域铜镍硫化物成矿作用机制具有... 详细信息

东天山黄山东和黄山西镁铁‒超镁铁岩是区域早二叠世大规模幔源岩浆作用的产物,赋存有两个大型岩浆铜镍硫化物矿床.黄山东和黄山西矿床的主要矿体均赋存于超镁铁岩中,其含矿超镁铁岩的成因机制研究对揭示区域铜镍硫化物成矿作用机制具有重要意义.本文对黄山东和黄山西含矿超镁铁岩进行了详细的电子背散射图像研究,发现其斜长石斑晶存在显著的不平衡结构,并系统进行了电子探针成分剖面分析.结果显示斜长石具有剧烈变化的成分环带,其中黄山东超镁铁岩斜长石An值介于48.6~75.6,黄山西含矿超镁铁岩斜长石An值介于44.9~79.2,表明两个矿床含矿超镁铁岩的母岩浆在侵位过程中发生过显著的成分变化.结合黄山东和黄山西镁铁‒超镁铁杂岩体地质特征,本文认为高分异镁铁质岩浆的加入导致了低分异超镁铁质岩浆成分发生显著变化,致使岩浆硫化物熔离,以及黄山东和黄山西大型铜镍硫化物矿床的形成.

关键词：斜长石铜镍硫化物矿床镁铁‒超镁铁岩黄山东黄山西东天山矿床学

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浅谈项目建设规模合理性分析思路——以石排镇中心小学新建工程项目为例

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城市建筑 2019年第3期16卷 78-79页

作者：周国超东莞市常平镇规划管理所广东东莞523570

建设规模也称生产规模,是指项目设定的正常生产运营年份可能达到的生产能力或使用效益。不同类型项目建设规模的表述不同:工业项目通常以年产量、年加工量、装机容量等表述;农林水利项目以年产量、种植面积、灌溉面积、防洪治涝面积、... 详细信息

建设规模也称生产规模,是指项目设定的正常生产运营年份可能达到的生产能力或使用效益。不同类型项目建设规模的表述不同:工业项目通常以年产量、年加工量、装机容量等表述;农林水利项目以年产量、种植面积、灌溉面积、防洪治涝面积、水库库容、供水能力等表述;城市基础设施项目和服务行业项目以年处理量、建筑面积、服务能力等表述^([1])。项目建设规模是否合理是项目可行性分析的重要一环,文中将以石排镇中心小学新建工程项目为例,阐述项目建设规模合理性的分析思路。

关键词：建设规模需求性合理性思路

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东天山卡拉塔格地区镁铁质岩体年代学、岩石地球化学研究

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岩石学报 2019年第10期35卷 3189-3212页

作者：周国超王玉往石煜解洪晶李德东郭博然中国地质大学地球科学与资源学院北京100083 北京矿产地质研究院有色金属矿山深部资源勘查工程技术研究中心北京100012

东天山大南湖岛弧带北缘卡拉塔格地区发育一系列镁铁质岩体,出露面积<1km2。岩体岩相较为单一,主要岩性有辉长岩、橄榄辉长岩、橄长岩、淡色辉长岩和辉绿岩。本文利用LA-ICP-MS测得2个辉长岩的锆石U-Pb年龄分别为282. 2±0. 6Ma和278. 3... 详细信息

东天山大南湖岛弧带北缘卡拉塔格地区发育一系列镁铁质岩体,出露面积<1km2。岩体岩相较为单一,主要岩性有辉长岩、橄榄辉长岩、橄长岩、淡色辉长岩和辉绿岩。本文利用LA-ICP-MS测得2个辉长岩的锆石U-Pb年龄分别为282. 2±0. 6Ma和278. 3±0. 6Ma;与吐哈盆地玄武岩及东天山地区铜镍硫化物矿床时代一致。岩石地球化学显示相对低Fe、高Al、Ca、碱、Ti,富集Rb、Ba、Sr、K,亏损Th、Nb、Ta的特征。岩石的(87Sr/86Sr)i=0. 70313~0. 70461,εNd(t)=+6. 22^+8. 64,(206Pb/204Pb)i=17. 68~18. 103,(207Pb/204Pb)i=15. 443~15. 536,(208Pb/204Pb)i=37. 423~37. 801,表现出高Nd、低Sr、低Pb,且变化范围较窄的特征。综合研究表明,该地区镁铁质岩体的岩浆动力学背景为后碰撞伸展环境;岩浆源区为俯冲板片交代的岩石圈地幔,并被软流圈物质混染;同位素和微量元素模拟显示母岩浆在源区遭受了5%~15%的板片流体交代,在上升过程中遭受了<5%的上地壳物质混染。卡拉塔格地区镁铁质岩体与东天山二叠纪镁铁-超镁铁质岩体和吐哈盆地玄武岩形成于同一构造岩浆系统,在剥蚀较浅的大南湖岛弧带具有形成铜镍硫化物矿床的潜力。

关键词：镁铁-超镁铁岩二叠纪地球化学岩浆源区卡拉塔格东天山

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秦巴汉水竞飞歌——湖北省十堰市人民医院改革与发展纪实

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中国医院 2005年第9期9卷 70-73页

作者：冯薇周国朝通讯员本刊记者

在中国的腹地,在秦巴山区、汉水之滨,在中国中西结合部的鄂豫渝陕四省交界处的湖北省十堰市,有一所建院仅仅23年的十堰市人民医院,该院在较短的时间里历经了从一个小门诊部到国家三级甲等医院,再到湖北省三甲示范医院,成为全国百姓放心... 详细信息

在中国的腹地,在秦巴山区、汉水之滨,在中国中西结合部的鄂豫渝陕四省交界处的湖北省十堰市,有一所建院仅仅23年的十堰市人民医院,该院在较短的时间里历经了从一个小门诊部到国家三级甲等医院,再到湖北省三甲示范医院,成为全国百姓放心示范医院和ISO9001和ISO14001国际质量与环境管理体系双认证医院的跨越式发展.其发展速度如此之快,奥秘何在?

关键词：十堰市人民医院医院改革湖北省 ISO14001 ISO9001 纪实三级甲等医院环境管理体系水

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