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Genesis, metallogenic model, and prospecting prediction of the Nibao gold deposit in the Guizhou Province, China

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Acta Geochimica 2023年第1期42卷 136-152页

作者： Weifang Song Lulin Zheng Jianzhong Liu Shengtao Cao zhuojun xie College of Resource and Environmental Engineering Guizhou UniversityGuiyang 550025China College of Mining Guizhou UniversityGuiyang 550025China Six Geological Team of Hubei Geological Bureau Xiaogan 432000China Guizhou Bureau of Geology and Mineral Exploration&Development Guiyang 550004China Innovation Center Ore Resources Exploration Technology in the Region of Bedrock Ministry of Natural Resources of People’s Republic of ChinaGuiyang 550018China Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550025China

Southwestern Guizhou province is one of China’s most important distribution areas of Carlin-type gold deposits. The Nibao deposit is a typical gold deposit in southwestern Guizhou. To elucidate the genesis of the Nibao gold deposit, establish a metallogenic model, and guide prospecting prediction, we systematically collected previously reported geological, geochemical, and dating data and discussed the genesis of the Nibao gold deposit,based on which we proposed the metallogenic *** works show that the Nibao anticline, F1 fault, and its hanging wall dragged anticline(Erlongqiangbao anticline) were formed before or simultaneously with gold mineralization, while F2, F3, and F4 faults postdate gold mineralization. Regional geophysical data showed extensive low resistivity anomaly areas near the SBT(the product of tectonic slippage and hydrothermal alteration)between the P2/P3 and the strata of the Longtan Formation in the SSE direction of Nibao anticline in the lower plate of F1 and hanging wall dragged anticline(Erlongqiangbao anticline), and the anomaly areas are distributed within the influence range of anticlines. Simultaneously, soil and structural geochemistry show that F1, Nibao anticline,Erlongqiangbao anticline, and their transition areas all show good metallogenic elements(Au, As, and S) assemblage anomalies, with good metallogenic space and prospecting possibilities. There are five main hypotheses about the source of ore-forming fluids and Au in the Nibao gold deposit:(1) related to the Emeishan mantle plume activity;(2) source from the Emeishan basalt;(3) metamorphic fluid mineralization;(4) basin fluid mineralization;(5) related to deep concealed magmatic rocks;of these, the mainstream understanding is the fifth speculation. It is acknowledged that the ore-forming fluids are hydrothermal fluids with medium–low temperature, high pressure, medium–low salinity, low density, low oxygen fugacity, weak acidity, weak reduction, and rich in CO_(2)and CH_

关键词： Nibao gold deposit Source of ore-forming fluids and Au Genesis Metallogenic model Prospecting prediction

Metallogenesis of the Baidi Au-Sb deposit, southwest Guizhou Province, China: mineralogical and geochemical evidence from sulfur-bearing minerals

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Acta Geochimica 2024年第2期43卷 199-213页

作者： Jun Yan Yong Xia Qinping Tan zhuojun xie Guosong Ji State KeyLaboratory of Ore Deposit Geochemistry Institute of GeochemistryChineseAcademy of SciencesGuiyang 550081China Guizhou InstituteofTechnology Guiyang550003China No.102 GeologicalTeam Guizhou Bureau of Geologyand Mineral Exploration&DevelopmentZunyi563003China

The Baidi Au-Sb deposit, which contains 8 t of Au and 10,979 Mt of Sb, is a typical and rare paragenetic deposit located in southwestern Guizhou Province, *** studies have focused on individual ores, but have not combined them to identify their paragenetic mechanism or metallogenic regularity. Therefore, we used field investigations, microscopic observations, and in situ analyses to identify the spatial distribution, mineral paragenesis, compositional evolution, and metallogenic material sources of the ore bodies. We also determined the Au and Sb paragenetic characteristics and the metallogenesis of the deposit. The main Au-bearing minerals in the deposit were early(Apy1–2) and late(Apy3) stage arsenopyrites, as well as pre-mineralization(Py1), mineralization(Py2–5), and late mineralization(Py6–7) stage pyrites. The main Sb-bearing minerals were stibnite(Snt), skinnerite, bournonite,and valentinite. The minerals formed in the order of Py1,Py2–3 + Apy1, Py4–5 + Apy2, Snt, and Py6–7 + *** δ34S values of the arsenopyrites and pyrites ranged from-5 to 5‰, while those of stibnite were mostly less than-5‰ in the later mineralization stages. Sulfur was provided by deep magmatic hydrothermal fluids, but sedimentary sulfur was added in the later stages. Moreover,the trace elemental contents fluctuated and eventually became similar to those of the sedimentary strata. By comprehensively considering the ores along with the geological characteristics of the deposit, we determined that deep magma provided the Au during ore formation. Later tectonic changes provided Sb from the sedimentary strata,which precipitated along fault expansion areas and produced Au and Sb paragenesis.

关键词： Au-Sb mineralization Arsenopyrite Pyrite Stibnite Metallogenetic process

Phosphorite generative processes around the Precambrian-Cambrian boundary in South China: An integrated study of Mo and phosphate O isotopic compositions

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Geoscience Frontiers 2021年第5期12卷 237-263页

作者： Haiying Yang Jiafei Xiao Yong Xia zhuojun xie Qinping Tan Jianbin Xu Shan He Shengwei Wu Xiqiang Liu Xingxiang Gong State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China School of Earth Sciences Yunnan UniversityKunming650500China School of Qilu Transportation Shandong UniversityJinan 250061China University of Chinese Academy of Sciences Beijing 101408China Reserve Bureau of Land and Mineral Resources of Guizhou Province Guiyang 550081China

Large phosphorite deposits in Central Guizhou,China,were formed around the Precambrian/Cambrian boundary(PC/C),including the Ediacaran(Doushantuo stage)and early Cambrian(Gezhongwu stage).Among them,Gezhongwu phosphorite from Zhijin are enriched in rare earth elements(REE)plus yttrium(REY),reaching 3.503 million *** phosphorites have attracted great attention,the specific sources P and REY remained *** determine the P and REY sources and establish a phosphogenic model of PC/C phosphorite,we present an integrated dataset of Mo and phosphate O isotopes for the first time,along with carbonate C and O isotopes,geology,petrology,and *** all samples,d18Op,Y/Ho,and Zr/Hf decreased from the Ediacaran to the early Cambrian,indicating increased terrigenous weathering fluxes while decreased upwelling water ***,terrigenous weathering delivery significantly elevated marine REY concentrations in the Cambrian in *** Ceanom and d98/95Mo suggest that seawater was oxidized in the later Ediacaran and became entirely oxic in the early *** positive feedback between oxygen levels in atmosphere and primary productivity caused progressive oxygenation in ocean-atmosphere system and enable phosphorites to be formed by different *** show that the Lower Doushantuo consist of abiotic intraclasts and exhibited“seawaterlike”REY types,indicating abiological and mechanical reworking *** Upper Doushantuo and Gezhongwu Formation contained mainly microbial debris and abiogenic intraclasts,and exhibit “hat-shaped”REY plots,suggesting microbially mediated *** on this data set,we developed a phosphogenic model illustrating formation of these two phosphorite deposits,wherein the Lower Doushantuo phosphorite formed through the reworking of pre-existing phosphatic sediments in anoxic and abiotic ocean,whereas the Upper Doushantuo and Gezhongwu phosphorite formed via microbial metabolisms in oxic and bio

关键词： Doushantuo formation Gezhongwu formation Phosphorite Ore-forming material origin Phosphate O isotope Mo isotope

Enrichment characteristics and sources of the critical metal yttrium in Zhijin rare earth-containing phosphorites, Guizhou Province, China

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Acta Geochimica 2021年第3期40卷 441-465页

作者： Xingxiang Gong Shengwei Wu Yong Xia Zhengwei Zhang Shan He zhuojun xie Jiafei Xiao Haiying Yang Qingping Tan Yi Huang Yuhong Yang Institute of Geochemistry Chinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China Technology Innovation Center of Mineral ResourcesExplorations in Bedrock Zones Ministry of Natural ResourcesGuiyang 550081China Reserve Bureau of Land and Mineral Resources of Guizhou Province Guiyang 550081China School of Earth Sciences Yunnan UniversityKunming 650500China

Yttrium(Y)is a critical metallic element that is used widely in modern scientific,technological,and industrial *** in the Zhijin area of Guizhou Province,China,are famous for Y enrichment,but the enrichment characteristics and sources remain *** studies suggested that the sources of rare earth elements(REEs,La-Lu)and Y(REYs,La-Lu+Y)were related to hydrothermal ***,this study presents evidence refuting that hypothesis,with major and trace elemental data collected with quadrupoleinductively coupled plasma-mass spectrometry(Q-ICPMS)*** data show that Y in Zhijin REYscontaining phosphorites has a normal distribution and is particularly enriched relative to other *** Y enrichment degree is different at different∑REY ***,the Y enrichment degree is higher at lower∑REY values and lower at higher∑REY *** REYs-containing phosphorites show features of primary *** REEs and Y have good correlations with P2 O5 in the phosphorites with low REYs contents(total REYs535 ppm),REEs have a good correlation with P2 O5 but Y does *** enrichment processes of REYs are suggestive of complex sources of ***,seafloor hydrothermal fluids were not the direct source of *** seawater mixed with terrestrial sources might have contributed to the origin of Y *** study could lead to improvements in Y mineral resource explorations and the situation involving the global REYs supply crisis.

关键词： Yttrium Phosphorites Rare earth elements Trace elements Enrichment processes

Geological and geochemical characteristics of the Baogudi Carlintype gold district(Southwest Guizhou, China) and their geological implications

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Acta Geochimica 2019年第4期38卷 587-609页

作者： Songtao Li Yong Xia Jianzhong Liu zhuojun xie Qinping Tan Yimeng Zhao Minghua Meng Lijin Tan Rong Nie Zepeng Wang Guanghong Zhou Haiyan Guo State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China No.105 Geological Team Guizhou Bureau of Geology and Mineral Exploration and DevelopmentGuiyang 550018China Bureau of Geology and Mineral Exploration and Development Guizhou Province Guiyang 550004China Guizhou Education University Guiyang 550018China School of Pharmacy Chengdu University of Traditional Chinese MedicineChengdu 611137China

The newly discovered Baogudi gold district is located in the southwestern Guizhou Province,China,where there are numerous Carlin-type gold *** better understand the geological and geochemical characteristics of the Baogudi gold district,we carried out petrographic observations,elemental analyses,and fluid inclusion and isotopic composition *** also compared the results with those of typical Carlin-type gold deposits in southwestern *** mineralization stages,namely,the sedimentation diagenesis,hydrothermal(main-ore and late-ore substages),and supergene stages,were identified based on field and petrographic *** main-ore and late-ore stages correspond to Au and Sb mineralization,respectively,which are similar to typical Carlin-type *** mass transfer associated with alteration and mineralization shows that a significant amount of Au,As,Sb,Hg,Tl,Mo,and S were added to mineralized rocks during the main-ore ***,arsenic,Sb,and S were added to the mineralized rocks during the late-ore *** migration indicates that the sulfidation process was responsible for ore *** types of fluid inclusions were identified in ore-related quartz and *** main-ore stage fluids are characterized by an H2O–NaCl–CO2–CH4±N2system,with medium to low temperatures(180–260℃)and low salinity(0–9.08%NaCl equivalent).The late-ore stage fluids featured H2O–NaCl±CO2±CH4,with low temperature(120–200℃)and low salinity(0–7.48%Na Cl equivalent).The temperature,salinity,and CO2and CH4concentrations of ore-forming fluids decreased from the main-ore stage to the late-ore *** calculated δ^13C,d D,and δ^18O values of the ore-forming fluids range from-14.3 to-7.0%,-76 to-55.7%,and 4.5–15.0%,***-ore-stage stibnite had δ^34S values ranging from-0.6 to 1.9%.These stable isotopic compositions indicate that the ore-forming fluids originated mainly from deep magmatic hydrothermal fluids,with minor contribution

关键词： Elemental geochemistry Fluid inclusions Stable isotopes Carlin-type gold deposits Baogudi gold district Southwestern Guizhou

我国医院伦理委员会组织结构中存在的问题及其对策研究

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医学与社会 2021年第11期34卷 125-129,134页

作者：谢卓君龚学德贵州医科大学公共卫生学院贵州贵阳550025 贵州医科大学医学人文学院贵州贵阳550025

通过阐述我国医院伦理委员会的基本现状,从医院伦理委员会功能运行前、运行中和运行后三个阶段进行思考,分析其组织结构上存在的主要问题。针对委员能力参差不齐、综合能力考核机制尚未成型、委员性别和专业背景比例组成不够合理、伦理... 详细信息

通过阐述我国医院伦理委员会的基本现状,从医院伦理委员会功能运行前、运行中和运行后三个阶段进行思考,分析其组织结构上存在的主要问题。针对委员能力参差不齐、综合能力考核机制尚未成型、委员性别和专业背景比例组成不够合理、伦理委员会难以保证独立性和公正性、伦理委员会缺乏统一管理标准和内部监管机制有待加强等问题,建议建立伦理委员资格考核制度,建立符合实际需求的伦理委员会,科学合理地选择伦理委员会委员,明确各类伦理委员会的定位,并建立合理的管理标准及完善的伦理委员会内部监管机制。

关键词：医院伦理委员会组织结构运行阶段

全球治理中的跨境数据流动规制与中国参与——基于WTO、CPTPP和RCEP的比较分析

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国际观察 2021年第5期 98-126页

作者：谢卓君杨署东重庆大学法学院重庆400044

世界各国在跨境数据流动方面制定的不同规制造成了数据流动壁垒,但数据流动的全球性、数据要素市场的依赖性以及数字经济的整体性均呼唤国际社会对跨境数据流动进行全球治理。鉴于充分的国际法治供给是跨境数据流动全球治理的基础,我们... 详细信息

世界各国在跨境数据流动方面制定的不同规制造成了数据流动壁垒,但数据流动的全球性、数据要素市场的依赖性以及数字经济的整体性均呼唤国际社会对跨境数据流动进行全球治理。鉴于充分的国际法治供给是跨境数据流动全球治理的基础,我们应当构建以"善治"为宗旨、以"规则导向"为目标、以"共商共建共享"原则为归宿的跨境数据流动规制三维框架,借此阐释跨境数据流动全球治理的应然状态。当前,国际法治供给不足与需求旺盛之间的结构性失衡是造成跨境数据流动国际法治贫困的主要原因,虽然WTO、CPTPP和RCEP等多边和区域机制对规制跨境数据流动均作出了不同程度的制度回应,但仍存在多边规制发展滞后、区域规制碎片化以及共识性合作缺乏的治理困境。本文认为,在三维框架的指引下,跨境数据流动全球治理应坚持从区域规制向多边规制的形式转型、从"软法"向"硬法"的性质转变,并且一定要明确宽泛灵活性规则的明晰适用机制。中国在参与跨境数据流动全球治理时,应将国内规则外化的接轨性法治建设与国际规则内化的对接性法治发展相结合,以不断提升中国在全球数据治理领域的制度性话语权主张能力和国际公共产品的供给能力。

关键词：跨境数据流动全球治理多边和区域规制国际法治中国外交

跨境数据流动贸易规制之例外条款:定位、范式与反思

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重庆大学学报（社会科学版） 2023年第6期29卷 233-245页

作者：杨署东谢卓君重庆大学法学院重庆400044

近年来,跨境数据流动成为数字经济新常态。各国对跨境数据流动进行立法管控形成了新型贸易壁垒并抑制全球经济活力的释放,跨境数据流动的贸易规制问题逐渐受到广泛关注。全球层面的跨境数据流动贸易规制,面临良好数据保护与数据自由流... 详细信息

近年来,跨境数据流动成为数字经济新常态。各国对跨境数据流动进行立法管控形成了新型贸易壁垒并抑制全球经济活力的释放,跨境数据流动的贸易规制问题逐渐受到广泛关注。全球层面的跨境数据流动贸易规制,面临良好数据保护与数据自由流动两个规制目标之间的平衡难题,关涉个人隐私、国家安全、数据自由流动等诸多利益诉求。当前,由于每个国家在社会、文化、政治、经济等方面的差异导致难以对规制目标的价值判断达成一致。不同规制目标间分歧的协调成为跨境数据流动贸易规制的重要任务。作为灵活性规则的例外条款,其独特的制度功能可以协调不同规制目标,达到不同规制目标间动态平衡的兼容效果,缓和公共政策保留要求与营造开放数字贸易环境之间的紧张关系。例外条款是跨境数据流动贸易规制的重要内容。现有跨境数据流动贸易规制体系中的例外条款存在不同范式,主要包括WTO例外条款、CPTPP例外条款以及RCEP例外条款三种类型。不同范式下例外条款规则设计在结构、语言表述、适用条件等方面差异明显,对不同规制目标可实现程度进行平衡与协调的能力也有所区别,各有优势但也面临不同程度的适用难度和不确定性。中国参与跨境数据流动新规则构建已经成为不可回避的任务,应当充分利用例外条款的制度功能提升我国制度话语权的对外输出能力。我国在例外条款范式选择上:一是,立足内在基准,需要实现参与者向共建者的角色转变,从完善国内数字法治出发,明晰跨境数据流动贸易规制的基本立场,寻求制度协调效应,避免恶性制度竞争;二是,寻求外在策略,坚持渐进式的功能转向策略,从追求宽松或模糊向明确或清晰的例外条款范式转变,逐渐由追求务实灵活的“契约”式合作向有拘束力“规则”式合作转型。

关键词：跨境数据流动贸易规制规制目标例外条款功能转向

维普期刊数据库博看期刊

数据跨境流动规制效用梗阻的治理范式革新:一个国际公共产品供给的视角

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世界经济与政治论坛 2023年第1期 63-85页

作者：谢卓君杨署东重庆大学法学院 400044

全球治理的实质良法善治难以应对数据跨境流动公共性多元耦合产生的新型治理需求,国际公共产品供给视角可指引数据跨境流动规制的形式良法善治范式革新。国际公共产品供给理论有助于厘清数据跨境流动规制的概念与内涵,即“规则制定—规... 详细信息

全球治理的实质良法善治难以应对数据跨境流动公共性多元耦合产生的新型治理需求,国际公共产品供给视角可指引数据跨境流动规制的形式良法善治范式革新。国际公共产品供给理论有助于厘清数据跨境流动规制的概念与内涵,即“规则制定—规则运行—规制评价”嵌套的动态独立国际法系统,以及形式良法善治需求下四类规制“一体两面”的多元协调系统运作方式。通过规制现状与谱系反思,发现数据跨境流动规制的效用梗阻呈现供给能力不足、供给过剩以及供给制约需求的国际公共产品结构性“供给失灵”现象。依据国际公共产品供给侧结构性改革的方法指引,效用梗阻的形式治理范式革新应坚持“加减乘除”四重运算的复合策略框架。数据跨境流动规制的全球治理形式范式革新符合中国积极参与全球治理体系改革和建设的主张,中国应积极引领国际公共产品的供给理念与模式变革。一方面,秉持以数据安全为核心、国内与国际规制双向互动为重点的兼容性规制理念;另一方面,以“数字丝绸之路”为支撑,深化平台联动、议题联结和机制协调,探索全面开放性和高度包容性的数据跨境流动规制中国模式。

关键词：数据跨境流动规制全球治理形式范式国际公共产品供给系统论数字丝绸之路