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| 1 | Characteristics of rare-earth elements (REE),strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field,southern Hunan Province,China显示文摘In this paper the authors present the REE concentrations and Sr and Nd isotopic compositions of fluorites from the Bailashui tin deposit of the Furong ore field,southern Hunan Province. The results showed that the total amount of REE in fluorites is usually low,ranging from 0.705 to 8.785 μg/g with the chondrite-normalized REE dis-tribution patterns similar to those of the Qitianling granites in the study area,characterized by LREE-enrichment patterns with pronounced negative Eu anomalies. The fluorites vary in Sr isotopic composition within the range of 0.7083-0.7091,the values are lower than those of the granites and higher than those of the host carbonate rocks in this area. The εNd(t) values of fluorites vary between -9.4 and +10.3,revealing that both the crust-and mantle-source materials were involved in the ore-forming hydrothermal fluids. Combined with previous studies on this ore deposit,the Bailashui tin deposit is temporally and spatially closely related with granitic magmatism in this area. The hydro-thermal fluorites are the product of fluid/rock interactions between granitic magmatic hydrothermal fluid and marine carbonate rocks. The REE and F in the ore-forming fluid were derived from the granites,whereas Sr in the ore-forming fluid came mainly from the granitic magmatic hydrothermal fluid and marine carbonate rocks,although variations in Sr isotopic composition cannot be explained by a simple mixture of these two end-members. Evidence demonstrated that the ore-forming fluids are of crustal-mantle mixing origin,but that the fluids were probably in-completely homogenized and this may be caused by inhomogeneous mixing of the fluids of different sources. | YUAN Shunda PENG Jiantang HU Ruizhong BI Xianwu QI Liang LI Zhaoli LI Xiaomin SHUANG Yan | 2008 | Chinese Journal Of Geochemistry2008，27，4： | 16 |
| 2 | Late Mesozoic Ore-forming Events in the Ningwu Ore District, Middle-Lower Yangtze River Polymetallic Ore Belt, East China: Evidence from Zircon U-Pb Geochronology and Hf Isotopic Compositions of the Granodioritic Stocks显示文摘Late Mesozoic volcanic-subvolcanic rocks and related iron deposits, known as porphyry iron deposits in China, are widespread in the Ningwu ore district (Cretaceous basin) of the middle-lower Yangtze River polymetallic ore belt, East China. Two types of Late Mesozoic magmatic rocks are exposed: one is dioritic rocks closely related to iron mineralization as the hosted rock, and the other one is granodioritic (-granitic) rocks that cut the ore bodies. To understand the age of the iron mineralization and the ore-forming event, detailed zircon U-Pb dating and Hf isotope measurement were performed on granodioritic stocks in the Washan, Gaocun-Nanshan, Dongshan and Heshangqiao iron deposits in the basin. Four emplacement and crystallization (typically for zircons) ages of granodioritic rocks were measured as 126.1±0.5 Ma, 126.8±0.5 Ma, 127.3±0.5 Ma and 126.3±0.4 Ma, respectively in these four deposits, with the LA-MC-ICP-MS zircon U-Pb method. Based on the above results combined with previous dating, it is inferred that the iron deposits in the Ningwu Cretaceous basin occurred in a very short period of 131-127 Ma. In situ zircon Hf compositions of εHf(t) of the granodiorite are mainly from -3 to -8 and their corresponding 176Hf/177Hf ratio are from 0.28245 to 0.28265, indicating similar characteristics of dioritic rocks in the basin. We infer that granodioritic rocks occurring in the Ningwu ore district have an original relationship with dioritic rocks. These new results provide significant evidence for further study of this ore district so as to understand the ore-forming event in the study area. | DUAN Chao LI Yanhe HOU Kejun YUAN Shunda LIU Jialin ZHANG Cheng | 2012 | Acta Geologica Sinica(English Edition)2012，86，3： | 11 |
| 3 | Fluid inclusions,C-H-O-S-Pb isotope systematics,geochronology and geochemistry of the Budunhua Cu deposit,northeast China:Implications for ore genesis显示文摘The Budunhua Cu deposit is located in the Tuquan ore-concentrated area of the southern Great Xing’an Range,NE China.This deposit includes the southern Jinjiling and northern Kongqueshan ore blocks,separated by the Budunhua granitic pluton.Cu mineralization occurs mainly as stockworks or veins in the outer contact zone between tonalite porphyry and Permian metasandstone.The ore-forming process can be divided into four stages involving stage Ⅰ quartz-pyrite-arsenopyrite;stage Ⅱ quartz-pyrite-chalcopyrite-pyrrhotite;stage Ⅲ quartz--polynetallic sulfides;and stage IV quartz-calcite.Three types of fluid inclusions(FIs) can be distinguished in the Budunhua deposit:liquid-rich two-phase aqueous FIs(L-type),vapour-rich aqueous FIs(V-type),and daughter mineral-bearing multi-phase FIs(S-type).Quartz of stages Ⅰ-Ⅲ contains all types of FIs,whereas only L-type FIs are evident in stage Ⅳ veins.The coexisting V-and S-type FIs of stages Ⅰ-Ⅲ have similar homogenization temperatures but contrasting salinities,which indicates that fluid boiling occurred.The FIs of stages Ⅰ,Ⅱ,Ⅲ,and Ⅳyield homogenization temperatures of 265-396℃,245-350℃,200-300℃,and 90-228℃ with salinities of3.4-44.3 wt.%,2.9-40.2 wt.%,1.4-38.2 wt.%,and 0.9-9.2 wt.% NaCl eqv.,respectively.Ore-forming fluids of the Budunhua deposit are characterized by high temperatures,moderate salinities,and relatively oxidizing conditions typical of an H2 O-NaCl fluid system.Mineralization in the Budunhua deposit occurred at a depth of0.3-1.5 km,with fluid boiling and mixing likely being responsible for ore precipitation.C-H-O-S-Pb isotope studies indicate a predominantly magmatic origin for the ore-forming fluids and materials.LA-ICP-MS zircon U-Pb analyses indicate that ore-forming tonalite porphyry and post-ore dioritic porphyrite were formed at 151.1±1.1 Ma and 129.9±1.9 Ma,respectively.Geochemical data imply that the primary magma of the tonalite porphyry formed through partial melting of Neoproterozoic lower crust.On the basis of available evidence,we suggest that the Budunhua deposit is a porphyry ore system that is spatially,temporally,and genetically associated with tonalite porphyry and formed in a post-collision extensional setting following closure of the Mongol-Okhotsk Ocean. | Kaituo Shi Keyong Wang Xueli Ma Shunda Li Jian Li Rui Wang | 2020 | Geoscience Frontiers2020，11，4： | 1 |
| 4 | Disproportionation and thermochemical sulfate reduction reactions in S–H 2 O–CH 4 and S–D 2 O–CH 4 systems from 200 to 340<ce:hsp sp='0.25'/>°C at elevated pressures显示文摘 | Shunda Yuan I-Ming Chou Robert C. Burruss Xiaolin Wang Jiankang Li | 2013 | Geochimica et Cosmochimica Acta2013，，： | 1 |
| 5 | In situ LA-MC-ICP-MS and ID-TIMS U–Pb geochronology of cassiterite in the giant Furong tin deposit, Hunan Province, South China: New constraints on the timing of tin–polymetallic mineralization显示文摘 | Shunda Yuan Jiantang Peng Shuang Hao Huimin Li Jianzhen Geng Dongliang Zhang | 2011 | Ore Geology Reviews2011，，1： | 1 |
| 6 | Regional crustal deformation characteristic before 2016 Yuncheng M4.4 earthquake swarm based on CMONOC continuous GPS data显示文摘To further study regional deformation characteristic in the southeast margin of Ordos Block during the period between the Alanshan M5.8 and Yuncheng M4.4 earthquake swarm,we analyze continuous GPS sites around the study area.The time-varying strain parameters removed a linear trend deviated from the background state in varying degrees since April,2015,and began to turn back at the end of the year 2015,meanwhile,the maximum extension strain and shear strain have the bigger variation relative to others.The GPS measurement also shows that the eastward displacement rate of the stations decreases during 2015e2016 in varying degrees compared to 2011e2015,and the variation is closely related to its geologic structural location.The differential movement between the stations is converted into regional strain accumulation due to the fault locking.Furthermore,during 2015e2016,the maximum extension rate oriented at near NS direction obviously increased,and the maximum contraction strain direction is changed from NW to EW direction,which contributes to strengthen extension and shear strain of the NEstriking faults,it's consistent with the regional background strain state of Shanxi seismic zone,this may be an important contributor to occurrence of M4.4 earthquake swarm in Yuncheng basin. | Ruichun Li Hongwei Li Shunda Yang | 2016 | Geodesy and Geodynamics2016，7，6： | 0 |
| 7 | Chinese expert consensus on multidisciplinary diagnosis and treatment of pancreatic neuroendocrine liver metastases显示文摘Many management strategies are available for pancreatic neuroendocrine neoplasms with liver metastases.However,a lack of biological,molecular,and genomic information and an absence of data from rigorous trials limit the validity of these strategies.This review presents the viewpoints from an international conference consisting of several expert working groups.The working groups reviewed a series of questions of particular interest to clinicians taking care of patients with pancreatic neuroendocrine neoplasms with liver metastases by reviewing the existing management strategies and literature,evaluating the evidence on which management decisions were based,developing internationally acceptable recommendations for clinical practice,and making recommendations for clinical and research endeavors.The review for each question will be followed by recommendations from the panel. | Yihebali Chi Liming Jiang Susheng Shi Shun He Chunmei Bai Dan Cao Jianqiang Cai Qichen Chen Xiao Chen Yiqiao Deng Shunda Du Zhen Huang Li Huo Yuan Ji Jie Li Wenhui Lou Jie Luo Xueying Shi Lijie Song Bei Sun Huangying Tan Feng Wang Xuan Wang Zhewen Wei Wenming Wu Dianrong Xiu Jianming Xu Huadan Xue Yi Yang Fei Yin Chunhui Yuan Yefan Zhang Weixun Zhou Dongbing Zhao Hong Zhao | 2023 | Journal of Pancreatology2023，6，4： | 0 |
| 8 | Fluid Inclusion Studies of Ore and Gangue Minerals from the Piaotang Tungsten Deposit, Southern Jiangxi Province, China显示文摘The Piaotang deposit is one of the largest vein-type W-polymetallic deposits in southern Jiangxi Province,South China.The coexistence of wolframite and cassiterite is an important feature of the deposit.Based on detailed petrographic observations,microthermometry of fluid inclusions in wolframite,cassiterite and intergrown quartz was undertaken.The inclusions in wolframite were observed by infrared microscope,while those in cassiterite and quartz were observed in visible light.The fluid inclusions in wolframite can be divided into two types:aqueous inclusions with a large vapor-phase proportion and aqueous inclusions with a small vapor-phase ratio.The homogenization temperature(Th)of inclusions in wolframite with large vapor-phase ratios ranged from 280℃ to 390℃,with salinity ranging from 3.1 to 7.2 wt%NaCl eq.In contrast,the Th values of inclusions with small vapor-phase ratios ranged from 216℃ to 264℃,with salinity values ranging from 3.5 to 9.3 wt%NaCl eq.T_(h) values of primary inclusions in cassiterite ranged from 316℃ to 380℃,with salinity ranging from 5.4 to 9.3 wt%NaCl eq.T_(h) values for primary fluid inclusions in quartz ranged from 162℃ to 309℃,with salinity values ranging from 1.2 to 6.7 wt%NaCl eq.The results show that the formation conditions of wolframite,cassiterite and intergrown quartz are not uniform.The evolutionary processes of fluids related to these three kinds of minerals are also significantly different.Intergrown quartz cannot provide the depositional conditions of wolframite and cassiterite.The fluids related to tungsten mineralization for the NaCl-H_(2)O system had a medium-to-high temperature and low salinity,while the fluids related to tin mineralization for the NaCl-H_(2)O system had a high temperature and medium-to-low salinity.The results of this study suggest that fluid cooling is the main mechanism for the precipitation of tungsten and tin. | WANG Xudong NI Pei YUAN Shunda LIU Jiqiang LI Mingyong LIU Hongxin | 2022 | Acta Geologica Sinica(English Edition)2022，96，5： | 0 |
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