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Development of Zr/ZrO_2 high temperature and high pressure sensors for in-situ measuring chemical parameters of deep-sea water

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Science china(Technological sciences) 2009年第8期52卷 2466-2473页

作者： zhang xuetong, zhang ronghua, hu shumin & wang yong open research laboratory of geochemical kinetics, institute of mineral resources, chinese academy of geological sciences, beijing 100037, china open research laboratory of geochemical kinetics Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

In order to in situ measure chemical parameters of deep-sea water and hydrothermal fluids at midocean ridge(MOR), it is necessary to use high temperature and high pressure chemical *** new sensors is essential to measure in-situ pH and other chemical parameters(dissolved H2, dissolved H2S) of deep-sea water and hydrothermal fluids in a wide temperature range(2℃―400℃) at MOR *** YSZ(Yttria Stabilized Zirconia, 9%Y2O3) ceramic-based(HgO/Hg) chemical sensors possess excellent electrochemical properties at high temperatures, which have been used to measure chemical parameters of hydrothermal fluids above 200℃.A novel Zr/ZrO2 oxidation/reduction electrode was constructed by oxidation of Zr wire in Na2CO3 *** Zr/ZrO2 electrode has good chemical stability while measuring pH of high-temperature aqueous solutions, combined with a Ag/AgCl reference *** of the Zr/ZrO2 sensor in association with a Ag/AgCl reference electrode vary linearly with pH over a wide pH range, as tested by various NaCl-HCl-H2O solutions(NaOH-NaCl-H2O for basic solutions), at temperatures in the range of 20℃―200℃.Thus, the Zr/ZrO2 sensors can be utilized in monitoring the fluids over the temperature range of 2℃―200℃.The Zr/ZrO2 electrode combined with Ag/AgCl, Ag/Ag2S, and Au electrodes has been used to measure pH and other chemical parameters(dissolved H2, dissolved H2S) of aqueous fluids from low to high temperatures and high pressures in the laboratory and to monitor those parameters of deep-sea water in South china Sea.

关键词： Zr/ZrO2 sensor melt oxidation method high temperature and high pressure chemical parameters investigation in the deep ocean

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Identification of carbonates with high positive carbon isotope excursion from the Liaohe Group in the northeastern North china Craton and implications for the Lomagundi-Jatuli Event

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Science china Earth sciences 2024年第9期67卷 2824-2844页

作者： Hongyu wang Shuanhong zhang Sen wang Linghao KONG Yue ZHAO Qiqi zhang Sen GAO Guohui hu institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China SinoProbe laboratory Chinese Academy of Geological SciencesBeijing 100037China School of Earth Science and mineral resources China University of GeosciencesBeijing 100083China

The Great Oxidation Event(GOE)during the early Paleoproterozoic represents the first significant buildup in Earth’s atmospheric oxygen and resulted in a series of significant changes in the Earth’s surface *** them is the 2.22(or 2.33)–2.06 Ga Lomagundi-Jatuli Event(LJE),which is globally,the largest magnitude and longest duration,marine carbonate positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)*** event has attracted the attention of scholars all over the ***,except for a high positive carbon isotope excursion(δ^(13)C_(V-PDB)>10‰)recently identified from marine carbonate rocks within the Daposhan Formation in the lower Fanhe Group(or the Sanchazi Group)in the Longgang Block in the northeast North china Craton(NCC),Paleoproterozoic carbonates in the NCC are characterized by a low-amplitude positive carbon isotope excursion(δ^(13)C_(V-PDB)geochemical analyses of Liaohe Group carbonate rocks from the Anshan area in the northwestern margin of the Jiao-Liao-Ji Belt in the northeast *** results show that the Gaojiayu Formation of the Liaohe Group in the Anshan area has high positive δ^(13)C_(V-PDB) values from 8.6‰ to 12.4‰ and δ^(18)O_(V-SMOW) values of 17.9‰-27.4‰(δ^(18)O_(V-PDB) values ranging from−12.6‰to -3.4‰).This provides solid evidence for the preservation of reliable sedimentary records of the LJE in the northeastern *** of the high positive δ^(13)C excursion(>10‰)of marine carbonate rocks occurred at about 2.15 *** co

关键词： Lomagundi-Jatuli Event(LJE) Great Oxidation Event(GOE) Carbon-oxygen isotopes Liaohe Group Marine carbonate Jiao-Liao-Ji Belt North china Craton

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Negative Haloes and geochemical Field Systems of Hydrothermal Deposits

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Acta Geologica Sinica(English Edition) 1993年第2期67卷 195-209页

作者： Ji Kejian, wang Liben, Lu Fengxiang, wang Wuyi and zhang Jianhua institute of mineral Deposits, chinese academy of geological sciences, beijing institute of mineral Deposits Chinese Academy of Geological Sciences Beijing

Primary haloes of hydrothermal deposits were previously considered as positive haloes. Although it has been recently suggested that primary haloes incude positive and negative ones, almost all the research work on primary haloes has still focused on positive haloes for various reasons. In order to understand the source of ore substances a number of large hydrothermal deposits related to magmatism including porphyry, skarn and vein type deposits have been studied. It has been found that negative haloes exist on the peripheries of positive haloes of a mineral deposit. On the basis of the study the authors propose the concept of the geochemical field system of ore-forming elements of hydrotherreal deposits, i. e., with the orebody as the centre outwards there occur the mineralized field, positive halo field, depleted field and background field successively.

关键词： hydrothermal deposit negative halo geochemical field system

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Metallogenic epoch and genesis of the gold deposits in Jiaodong Peninsula, Eastern china: a regional review

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Progress in Natural Science:Materials International 2007年第2期17卷 138-143页

作者： YANG Liqiang, DENG Jun, GE Liangsheng, wang Qingfei, zhang Jing, GAO Bangfei, JIANG Shaoqing and XU Hao ( State Key laboratory of geological Processes and mineral resources, china University of Geosciences, beijing 100083, china Key laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, china University of Geosciences, beijing 100083, china) [a]State Key laboratory of geological Processes and mineral resources China University of Geosciences Beijing China [b]Key laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing China

Gold deposits are characterized by multi-sources, superimposition, large scale and temporal-spatial concentration in Jiaodong Peninsula, Eastern china. In this paper, we review the history and the development of the study on metallogenic chronology and genesis of gold deposits, summarize the main features of superimposed metallogenesis, provide evidence of the Mesozoic complex metallogenic system, and point out some problems for further research of Jiaodong gold deposit cluster from a regional view. Although gold deposits are different in genetic types, ore-forming materials and geological settings, our research indicates that the accumulation and emplacement of the ore-forming materials are temporally-spatially concentrated on a large scale, and the main metallogenic epoch of Jiaodong gold deposits was concentrated in Mesozoic. Metallogenic chronology and geological-geochemical data indicate that there are two periods of gold mineralizations occurred in 130-110 Ma and 90-80 Ma respectively in Jiaodong ore cluster. The gold deposit cluster results from the superimposition of the polygenetic mineralization, and further study is needed to investigate the formation and evolution of the Mesozoic complex metallogenic system.

关键词： superimposed metallogenic system Mesozoic Jiaodong ore cluster.

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Texture and Geochemistry of Multi-stage Hydrothermal Scheelite in the Mamupu Cu-Au-Mo(-W)Deposit,Eastern Tibet:Implications for Tungsten mineralization in the Yulong Belt

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 701-716页

作者： zhang Xiaoxu TANG Juxing LIN Bin wang Qin HE Liang YAN Gang SHAO Rui WU Qiang DU Qiu ZHAXI Pingcuo Chengdu Center China Geological Survey(Geosciences Innovation Center of Southwest China)Chengdu 610081China MNR Key laboratory of Metallogeny and mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China SinoProbe laboratory Chinese Academy of Geological SciencesBeijing 100094China Earth sciences College Chengdu University of TechnologyChengdu 610059China No.6 geological Party Tibetan Bureau of Geology and Mineral Exploration and DevelopmentLhasa 851400China Tibet Shengyuan Mining Group Co. Ltd.Lhasa 851400China

Multistage tungsten mineralization was recently discovered in the Mamupu copper-polymetallic deposit in the southern Yulong porphyry copper belt(YPCB),*** study reports the results of cathodoluminescence,trace element and Sr isotope analyses of Mamupu scheelite samples,undertaken in order to better constrain the mechanism of W mineralization and the sources of the ore-forming *** different types of scheelite are identified in the Mamupu deposit:scheelite A(Sch A)mainly occurs in breccias during the prograde stage,scheelite B(Sch B)forms in the chlorite-epidote alteration zone in the retrograde stage,while scheelite C(Sch C)occurs in distal quartz sulfide *** extremely high Mo content and negative Eu anomaly in Sch A represent high oxygen fugacity in the prograde *** with ore-related porphyries,Sch A has a similar REE pattern,but with higher ΣREE,more depleted HREE and slightly lower(^(87)Sr/^(86)Sr)i *** features suggest that Sch A is genetically related to ore-related porphyries,but extensive interaction with carbonate surrounding rocks affects the final REE and Sr isotopic *** B shows dark(Sch B-I)and light(Sch B-II)domains under CL *** Sch B-I to Sch B-II,LREEs are gradually depleted,with MREEs being gradually *** C has the highest LREE/HREE ratio,which indicates that it inherited the geochemical characteristics of fluids after the precipitation of HREE-rich minerals,such as diopside and garnet,in the early prograde *** Mo content in Sch B and Sch C gradually decreased,indicating that the oxygen fugacity of the fluids changed from oxidative in the early stages to reductive in the later,the turbulent Eu anomaly in Sch B and Sch C indicating that the Eu anomaly in the Mamupu scheelite is not solely controlled by oxygen *** extensive interaction of magmatic-hydrothermal fluids and carbonate provides the necessary Ca^(2+)for the precipitation of scheelite in the Mamupu deposit.

关键词： scheelite geochemistry Mamupu Cu deposit Yulong porphyry copper belt eastern Tibet

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Mn content of reservoir calcite cement: A novel inorganic geotracer of secondary petroleum migration in the tectonically complex Junggar Basin (NW china)

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Science china Earth sciences 2007年第12期50卷 1796-1809页

作者： CAO Jian1,hu WenXuan1,YAO SuPing1,zhang YiJie2,wang XuLong3,zhang YueQian3,TANG yong3 & SHI XinPu3 1 State Key laboratory for mineral Deposit research,Department of Earth sciences,Nanjing University,Nanjing 210093,china 2 research institute of Exploration and Development,Petrochina,beijing 100083,china 3 research institute of Exploration and Development,Petrochina Xinjiang Oilfield Company,Karamay 834000,china 1. State Key laboratory for mineral Deposit research Department of Earth Sciences Nanjing University Nanjing 210093 China 2. research institute of Exploration and Development PetroChina Beijing 100083 China 3. research institute of Exploration and Development PetroChina Xinjiang Oilfield Company Karamay 834000 China

Electronic probe microanalysis(EPMA) results of reservoir calcite cement from fourteen core samples in the Junggar Basin show that Mn-content varies largely between different samples from below the detect limitation to 4.14%,while it displays a generally good correlation with oil-gas ***,therefore,likely indicates that concentration of the Mn-content of the calcite cement has a close rela-tion to the intensity of petroleum fluid charging during hydrocarbon secondary *** order to assess this hypothesis,oxygen and strontium isotopic measurements on sixteen calcite veins host in source sequences were carried out to investigate the feature of the oil-source petroleum *** results imply that during hydrocarbon generation and migration,deep hot fluid has dissolved volcanic minerals interlined between mudstone source *** Mn is a kind of typical trace element enriched in volcanic rocks,it is reasonable to conclude that the petroleum fluid formed in the source sequences would be ***,calcite cements precipitated from such Mn-rich petroleum fluid would be Mn-rich *** to the geologic chromatographic effect during migration along reservoir rocks,the decreasing of the Mn-content of the reservoir calcite cements indicates the migration ***,this novel geotracer was further successfully applied in the study of hydrocarbon migration in the Junggar Basin in combination with organic geochemical analyses during the hydrocarbon *** Mn content of the reservoir calcite cement appears promising as a novel inorganic geotracer for the petroleum *** paper represents a search for novel indicators of secondary petroleum migration in tectonically complex basins based on fundamentals of the reservoir fluid-rock interactions.

关键词： Petroleum migration, inorganic geochemistry, water-rock interaction, reservoir calcite cement, the Junggar Basin

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砂岩型铀矿土壤热释光特性及测量流程优化

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原子能科学技术 2024年第2期58卷 471-480页

作者：张欣熠王猛谷懿王勇葛良全张庆贤李潇潇成都理工大学四川省地学核技术重点实验室四川成都610059 成都理工大学核技术与自动化工程学院四川成都610059 核工业北京地质研究院北京100029

砂岩型铀矿因其矿体埋深大、辐射信息被掩盖,传统放射性物探技术难以满足其勘查需求。本文基于天然土壤热释光测量技术,对砂岩型铀矿表层沉积岩样品的热释光特性进行了深入研究,明确了稳定热释光信号主要来源于长石与石英矿物成分。通... 详细信息

砂岩型铀矿因其矿体埋深大、辐射信息被掩盖,传统放射性物探技术难以满足其勘查需求。本文基于天然土壤热释光测量技术,对砂岩型铀矿表层沉积岩样品的热释光特性进行了深入研究,明确了稳定热释光信号主要来源于长石与石英矿物成分。通过甄选稳定的热释光信号,并基于200、237、263、325、375℃下稳定的热释光信号建立了适用于砂岩型铀矿勘查的优化测量流程。针对长石和石英混合矿物成分,测量流程选取的热释光信号在0~600 Gy辐照剂量范围内具有较好的剂量响应特性,且等效剂量测量值相对误差小于7%,兼顾了测量效率与准确性,可为天然土壤热释光法应用于砂岩型铀矿勘探提供技术参考。

关键词：砂岩型铀矿释光特性稳定释光信号释光测量流程

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An integrated north–south paleo-Dadu-Anning River: New insights from bulk major and trace element analyses of the Xigeda Formation

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china Geology 2024年第1期7卷 91-103页

作者： yong Zheng Hai-bing Li Jia-wei Pan Ping wang Ya Lai Zheng Gong Key laboratory of Deep-Earth Dynamics Institute of GeologyChinese Academy of Geological SciencesChina Geological SurveyMinistry of Natural ResourcesBeijing 100037China Jiangsu Donghai Continental Deep Hole Crustal Activity National Observaion and research Station Lianyungang 222300China Southern Marine Science and Engineering Guangdong laboratory Guangzhou 511458China Geophysical Exploration Center China Earthquake AdministrationZhengzhou 450002China institute of Geophysics China Earthquake AdministrationBeijing 100081China

The Xianshuihe-Anninghe fault extends SE–S and constitutes the southeastern margin of the Tibetan ***,the Dadu River which is associated with the fault does not flow following the path,but makes a 90ºturn within a distance of 1 km at Shimian,heading east,and joins the Yangtze River,finally flowing into the East china *** to the abrupt turn,a low and wide pass near the Daqiao reservoir at Mianning separates the N–S course of the Dadu River from the headwater of the Anning River which then flows south into the Yunnan Province along the Anninghe ***,many previous studies assumed southward flow of the paleo-Dadu River from the Shimian to the Anning ***,evidences for the capture of the integrated N–S paleo-Dadu-Anning River,its timing,and causes are still *** study explored the paleo-drainage pattern of the Dadu and Anning Rivers based on bulk mineral and geochemical analyses of the large quantities of fluvial/lacustrine sediments along the trunk of the Dadu and Anning *** with sands in the modern Dadu River,the Xigeda sediments also exhibit a granitoid affinity with the bulk major mineral compositions of quartz(>50%),anorthite(about 10%),orthoclase(about 5%),muscovite(about 5%),and clinochlore(about 4%).Correspondingly,bulk major elements show high SiO_(2),with all samples>60%,and some of them>70%,low TiO_(2)(≤0.75%),P_(2)O_(5)(≤0.55%),FeO*(≤5%),and relatively high CaO(1.02%–8.51%),Na_(2)O(1.60%–2.52%),and K_(2)O(2.17%–2.71%),with a uniform REE ***,synthesizing all these results indicate that these lacustrine sediments have similar material sources,which are mainly derived from its course in the Songpan-Ganzi flysch block,implying that the paleo-Dadu originally flowed southward into the Anning River and provided materials to the Xigeda ancient *** rearrangement of the paleo-Dadu River appears to be closely related to the locally focused uplift driven by strong activities of the Xians

关键词： Dadu River Anninghe fault River diversion Xigeda Formation Tectonic uplift Provenance Songpan-Ganzi flysch Ancient lake Xianshuihe-Xiaojiang fault system Tibetan Plateau

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柴达木盆地周缘战略性金属矿产成矿规律与勘查方向

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地学前缘 2024年第3期31卷 260-283页

作者：张爱奎袁万明刘光莲张勇汪周鑫孙非非刘智刚青海省第三地质勘查院青海西宁810029 中国地质大学(北京) 北京100083 河北地质大学地球科学学院河北石家庄050031

战略性矿产资源是国民经济发展的重要基础,也是国家安全的根本保障。柴达木盆地周缘战略性矿产资源丰富,成矿条件有利,提升成矿规律认识和明确勘查方向,对于实现找矿突破,为国家提供战略性矿产资源保障基地具有重要意义。笔者在全面收... 详细信息

战略性矿产资源是国民经济发展的重要基础,也是国家安全的根本保障。柴达木盆地周缘战略性矿产资源丰富,成矿条件有利,提升成矿规律认识和明确勘查方向,对于实现找矿突破,为国家提供战略性矿产资源保障基地具有重要意义。笔者在全面收集区内已有资料的基础上,通过系统梳理柴达木盆地周缘战略性矿产种类,分析其成矿类型及成矿特点,结合地球物理及地球化学资料,提出进一步勘查方向。主要取得如下成果:①柴达木盆地周缘金、镍、钴是具有地域优势的战略性矿产,奥陶纪、志留纪末—泥盆纪和三叠纪是金、镍和钴矿最重要的3个成矿期。②镍矿床类型为与镁铁超镁铁岩有关的同生岩浆矿床,主要形成于志留纪末—泥盆纪后碰撞后造山环境,铁质超镁铁岩愈加发育,原生岩浆MgO含量和部分熔融程度高,Fo值和En值高且数值接近,橄榄石Ni含量较低有利于形成大矿。③钴矿分为岩浆型、(变)沉积岩容矿型及热液型三大类:岩浆型钴矿伴生在与镁铁超镁铁岩有关的岩浆铜镍钴硫化物矿床中,Co与Ni品位及资源储量近乎成正比;(变)沉积岩容矿型包括奥陶纪锰钴矿和中元古代氧化铁钴矿,前者是东昆仑成矿带较为特色且具有较大找矿潜力的一种新类型钴矿;热液型以热水喷流沉积型和夕卡岩型较为重要,前者往往形成独立矿床或与铜矿共生,成矿时代以奥陶纪为主,其次是石炭纪,形成于奥陶纪增生造山作用和石炭纪古特提斯洋扩张环境,夕卡岩型钴矿多与铁或铜矿共(伴)生,主要产在三叠纪花岗岩与围岩接触带或远离接触带的夕卡岩中,矿石品位一般较高。④金矿有造山型、夕卡岩型、斑岩型、浅成低温热液或岩浆期后中低温热液型4个类型,存在425.5~401 Ma、383~349 Ma、284~263.21 Ma和242.2~202.7 Ma共4期成矿事件,以第一和第四期最为重要,分别响应原特提斯洋构造旋回后碰撞伸展及古特提斯洋构造旋回后碰撞后造山伸展,志留纪末—泥盆纪和中—晚三叠世两次大规模壳幔相互作用是控制金矿形成的深部因素。⑤志留纪末—泥盆纪岩浆铜镍钴硫化物矿床、奥陶纪沉积岩容矿型锰钴矿和热水喷流沉积型钴矿、志留纪末—泥盆纪和中—晚三叠世造山型金矿、中二叠世—三叠纪斑岩型铜钼钨锡矿、三叠纪伟晶岩型锂(铍铌钽铷铯)矿、三叠纪夕卡岩型铁多种战略性金属复合矿及寒武纪岩浆型铬矿是今后勘查的重要类型,需关注区内中—低地磁异常区和地球化学综合异常区,加强矿床深边部和半隐伏矿床的勘查。

关键词：战略性金属矿产成矿特征成矿规律勘查方向柴达木盆地周缘

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内蒙古边家大院锡多金属矿床成矿岩体岩石地球化学特征及成矿潜力评价

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矿床地质 2024年第2期43卷 429-442页

作者：张雪旎王佳新张阳阳袁顺达中国地质大学(北京)地球科学与资源学院北京100083 中国地质科学院矿产资源研究所北京100037 湖北省地质科学研究院(湖北省富硒产业研究院) 湖北武汉430000

内蒙古边家大院锡多金属矿床是大兴安岭南段多金属成矿带的代表性矿床之一,其西矿区主要发育斑岩型Sn-Cu-Mo矿体,矿体发育于石英斑岩体内。文章通过对石英斑岩开展全岩地球化学、锆石Hf同位素以及锆石微量元素地球化学分析研究,确定了... 详细信息

内蒙古边家大院锡多金属矿床是大兴安岭南段多金属成矿带的代表性矿床之一,其西矿区主要发育斑岩型Sn-Cu-Mo矿体,矿体发育于石英斑岩体内。文章通过对石英斑岩开展全岩地球化学、锆石Hf同位素以及锆石微量元素地球化学分析研究,确定了该含矿岩体岩浆性质、来源及演化历史,探讨了成岩成矿关系,并进一步评估了该岩体成锡、铜矿潜力。研究表明,边家大院石英斑岩为准铝质-弱过铝质,高钾钙碱性花岗岩。稀土元素具有轻稀土元素富集、重稀土元素亏损,Eu负异常明显的特征。微量元素具有富集大离子亲石元素,亏损高场强元素的特征。结合其较低的Zr/Hf和Nb/Ta比值以及较高的Rb/Sr比值判断其经历了高分异结晶演化。根据锆石微量元素地球化学特征,确定边家大院石英斑岩源于还原性(ΔFMQ-0.15)、高温贫水(>750℃)岩浆。边家大院石英斑岩ε_(Hf)(t)为-0.86~5.99,TDM2=809~1240 Ma,为中元古代—新元古代年轻地壳部分熔融形成。根据锆石微量元素Ce^(4+)/Ce^(3+),Ce_(N)/Ce_(N)^(*),Ce/Nd和Eu_(N)/Eu_(N)^(*)指针性比值及岩浆特性判断,该石英斑岩有利于锡金属富集成矿,而成铜钼矿潜力小。

关键词：还原性岩浆贫水岩浆高分异花岗岩大兴安岭南段边家大院矿床

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