|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Geochemistry of Pyrite from the Gangcha Gold Deposit, West Qinling Orogen, China: Implications for Ore Genesis显示文摘The Gangcha gold deposit was discovered in 2011 in the Xiahe-Hezuo region, West Qinling Orogen, China. Five types of pyrite have been identified in the ore according to the detailed mineral paragenetic studies. Geochemical data are presented for type I pyrite(py1) rim-core zonation and for the different types of pyrite based on in-situ laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS) and electron probe microanalysis(EPMA). The results show that pyrites are characterized with heterogeneous Au concentrations, which indicate that Au occurs mainly as micro-or nano-particle native inclusions. Time-resolved depth profiles demonstrate that As, Co and Ni occur as solid solutions in pyrite, whereas Cu, Pb, Zn and Ag occur mainly as inclusions. Trace element concentrations differ between rims and cores in py1, and the differences also exist within different pyrite types. These differences indicate complex chemical evolution of the ore-forming fluids, and the overall geology, geochronology, and stable isotope and pyrite data suggest that the ore-forming fluids were closely linked to magmatic activity during the Triassic Period in West Qinling orogenic belt. | NIE Xiao SHEN Junfeng LIU Haiming DU Baisong WANG Shuhao LI Jie XU Liwei WANG Ran | 2017 | Acta Geologica Sinica(English Edition)2017，91，6： | 5 |
| 2 | Determining gastric cancer resectability by dynamic MDCT显示文摘 | Zilai Pan Huan Zhang Chao Yan Lianjun Du Bei Ding Qi Song Huawei Ling Baisong Huang Kemin Chen | 2010 | European Radiology2010，，3： | 2 |
| 3 | Incidence of Major Adverse Cardiovascular and Cerebrovascular Events in Chinese Patients Undergoing Percutaneous Coronary Intervention with Iodixanol: An Observational Postauthorization Study显示文摘Objective:This study aimed to evaluate the major adverse cardiovascular and cerebrovascular events(MACCEs)and overall safety profile associated with iodixanol in Chinese patients undergoing percutaneous coronary intervention(PCI).Methods:Patients at 30 centers in China registered in the OpenClinic v3.6 database from October 30,2013,to October 7,2015,were included in the study.The primary endpoint was in-hospital MACCEs including target lesion revascularization(TLR),stroke,stent thrombosis,cardiac death,and PCI-related myocardial infarction(MI)within 72 h post-PCI.Secondary endpoints were MACCEs from 72 h to 30 d post-PCI and other safety events within 30 d post-PCI.Results:A total of 3,042 patients were enrolled.The incidence of MACCEs within 72 h post-PCI was 2.33%(n=71),including cardiac death(0.03%,n=1)and PCI-related MI(2.30%,n=70).The incidence of MACCEs from 72 h to 30 d post-PCI was 0.16%(n=5),including cardiac death(0.10%,n=3),PCI-related MI(0.03%,n=1),and TLR for stent thrombosis(0.03%,n=1).The incidence of composite angiographic or procedural complications was 2.86%(n=87);233(7.86%)patients had results suggesting contrast-induced acute kidney injury.Conclusions:These findings indicate that the use of iodixanol in Chinese patients undergoing PCI is associated with a low incidence of MACCEs,confirming its safety in this population. | Xiaozeng Wang Dengfeng Ma Tianchang Li Bao Li Xi Su Yanqing Wu Zhimin Du Zheng Ji Ping Yang Baisong Yang Xuebin Cao Junxia Li Fengxia Hou Ziping Cheng Banglong Xu Yaling Han | 2023 | Cardiology Discovery2023，3，2： | 0 |
| 4 | Role of metasomatized mantle lithosphere in the formation of giant lode gold deposits:Insights from sulfur isotope and geochemistry of sulfides显示文摘The Wulong deposit is one of the largest quartz vein-type gold deposits with at least 80 tons of identified gold reserves in the eastern part of the Liaodong Peninsula.Gold orebodies are mainly hosted in the Late Jurassic gneissic two-mica granite and Early Cretaceous diorite dykes,and are structurally controlled by the NNE-and NW-trending faults.Gold mineralization mainly occurs as veins with lenticular shapes and is closely associated with sulfides and Bi minerals.Previous studies on the deposit mainly focused on its geological characteristics,fluid inclusions and the timing of gold mineralization.However,the extreme enrichment mechanism of gold,the geodynamic setting and ore source of the gold deposit remain equivocal.Here we present results from geochemical studies of pyrite and pyrrhotite at Wulong to address these issues.Pyrrhotite can be grouped into euhedral(Po1)and anhedral(Po2)varieties based on the textures.Four generations of pyrite were identified based on petrographic studies:Py1 is coarse-grained subhedral to euhedral crystal coexisting with milky quartz,and Au-depleted in composition;Py2 is represented by medium-grained,subhedral to anhedral pyrite coexisting with euhedral Po1,smoky quartz and minor chalcopyrite;Py3 occurs as fined-grained anhedral grains in the quartz-polymetallic sulfide veins;Py4 occurs as veinlets or aggregates in the quartz-calcite veins and contains the lowest Au concentrations.The time-resolved LA-ICP-MS ablation depth profiles of sulfides combined with detailed petrological observations indicate that gold mainly occurs either as invisible solid solution within the crystal lattice of sulfides,to some extent,or as small blebs of native gold and electrum.The close temporal and spatial relationships among native bismuth,native gold and Bi-Te-S minerals suggest that Bi-rich melts may have significantly sequestered gold from the hydrothermal fluids in the Wulong gold deposit.Sulfides from auriferous quartz veins have a restricted D33S range(-0.2‰to+0.2‰)and a mean d34S value of+1.25‰with a feature of the mass-dependent fractionation(MDF)of sulfur isotopes,implying that the ore-forming materials were potentially derived from the mantle lithosphere that was metasomatized and fertilized by subduction-related fluids released from slab during the Early Cretaceous.This study demonstrates the Bi-rich melts as significant gold scavengers in As-deficient ore-forming fluid,and highlights the fundamental role of the metasomatized and fertilized mantle lithosphere in the formation of giant lode gold deposits in the eastern North China Craton at ca.120 Ma. | Baisong Du Zuoman Wang M.Santosh Yuke Shen Shufei Liu Jiajun Liu Kexin Xu Jun Deng | 2023 | Geoscience Frontiers2023，14，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员