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| 1 | 赣东北西蒋金矿地质特征及矿化富集规律显示文摘文章利用新的勘查成果,对矿田内西蒋金矿的容矿地层、矿区构造、围岩蚀变、矿体特征及矿石类型进行归纳总结,获得如下认识:(1)西蒋金矿为新元古代韧性剪切带控制的变质热液型金矿;(2)矿区内西蒋—石碑和金山—朱林两条韧性剪切带在深部倾角逐渐变陡并聚合在一起;(3)变质安山玄武岩、高含量的黄铁矿以及硅化、铁白云石化是有利的找矿标志。这些研究成果希望能对'金山式'金矿的含矿韧性剪切带深部构造特征的认识以及金山金矿田深边部找矿有所帮助。 | 胡金山 刘金刚 张广明 胡国浩 熊平文 王谦 | 2016 | 矿产勘查2016，7，4： | 6 |
| 2 | Red Clay Type Gold Deposits in China显示文摘红泥土类型金牌沉积物,在中国的南方定位了, orogenic 带位于不仅,而且在内部 cratons,在气候是热带副热带的与的地方清楚干旱、潮湿。含有红土的捱过外壳能经常被划分成五个地区,包括表层土,硅质的硬壳地区,多色地区(或在一些沉积物的红泥土地区) ,从表面的无生气的地区和到底的 saprolite 地区摇其几在一些沉积物是不在的。基础岩石与次要的碎屑状的岩石主要由碳酸盐岩石组成,中介基本的暴烈的岩石并且中间酸并且 alkalic 侵入。orebodies 主要与他们的部分位于多色地区在无生气并且 saprolite 地区。矿石来源包括巫婆类型金存款和斑岩黄金的 orebodies 存款,以及充满黄金的底岩石。红泥土类型金牌存款经历了早阶段的 endogenic 金牌矿化作用和红土化作用在期间第三级、第四级。有黄金在南部的中国在高原,在中间降低的山的 structual erosional 平台,和 intermountain 盆上在石灰岩地区常见的地形消沉存的 endogenic 金牌存款,特别巫婆类型金存款和斑岩的区域值得学习跟踪红泥土类型金牌存款。 | SUN Xiang DENG Jun WANG Qingfei GONG Qingjie YANG Liqiang WANG Changming | 2010 | Acta Geologica Sinica(English Edition)2010，84，6： | 5 |
| 3 | Recovery of the Erosion Thickness and Characterization of the Paleogeomorphology in the Southern Lishui Sag, East China Sea Shelf Basin显示文摘The restoration of the denudation thickness is the basis for quantitatively analyzing the basin burial history,thermal evolution history and hydrocarbon accumulation conditions.The well data is not sufficient to do this in the southern Lishui Sag with only 5 wells,so the new,high-quality three-dimensional(3D)seismic data is essential.The methods employed to determine the eroded thicknesses of key unconformities in the study area are the mudstone acoustic time difference(AC)method,vitrinite reflectance(Ro%)method and stratigraphic trend comparison method.On the basis of the structural evolution,the restoration of the paleogeomorphology is carried out.The results show that the Wenzhou formation(E2 w)in the entire study area has been all denuded.The denudation thickness is in the range of 0–550 m,and decreases gradually from west,thicker than 200 m,to east.The erosion of the upper Lingfeng formation(E1l)are mainly occurred in the N-P-1 structural trap(N-P-1),the N-P-2 structural trap(N-P-2)and the N-P-3 structural trap(N-P-3).Among them,the eroded area in N-P-1(near well S-1)and N-P-2 is 200–230 km^2,and the denudation thickness is 0–600 m,which increases from south to north,even up to 200–400 m in the region around well S-1.In N-P-3,the extent of denudation is 30–50 km^2,and the denudation thickness is 0–400 m.In the early stage of the upper E1 l,one north-south strike slip fault began to develop in the southern study area.Affected by this fault,the southern Lingfeng bulge was offset,forming a gorge,and the eastern and western sides of the concave belt connected to each other.On the basis of the paleo-geomorphological characteristics,it is shown that the sedimentary center of the west subsag began to migrate to the south. | LI Na ZHANG Jinliang SHEN Wenlong LIU Yang LIU Huaishan WANG Jinkai XIE Jun | 2020 | Journal of Ocean University of China2020，19，2： | 3 |
| 4 | Growth Pattern and Its Indication of Spheroidal Nano-Micro Crystal Aggregates of Pyrite in the Baiyunpu Pb-Zn Polymetallic Deposit, Central Hunan显示文摘The Baiyunpu deposit lies in the southwest plunging Dachengshan anticline in central Hunan, which is a large Pb-Zn polymetallic deposit. The orebodies were surrounded by the Qiziqiao Formation limestone in the Middle Devonian, and its geological occurrence is consistent with the wall rocks. A large number of spheroidal pyrite aggregates are found unevenly distributed in the ores. The spheroidal aggregates are made up of kernels and concentric rings. The kernels are composed of approximately epigranular pyrite nanocrystals, while the rings are composed of accumulated pyrite microcrystals growing along the radial direction. The spheroidal pyrite aggregate and its outer zones can be divided into five areas(A–E). The results of electron probe micro analysis(EPMA) show that from the zone A1 to B, Co/Ni <1, the sum of Co and Ni is 0.08%–0.26%, S/Fe increases from 2.06 to 2.15. While from the zone C to E, Ni cannot be detected and S/Fe decreases from 2.22 to 2.08. Powder X-ray diffraction(XRD) analysis in the micro zone shows obvious crystalline characteristics in the aggregates. Moving from the inside outwards, the maximum diffraction peak intensity of the(111) and(220) crystal planes of pyrite increases, and the crystallinity improves. The degree of change in the(111) plane is the most prominent. Considering the theory of crystal growth along with the geologic features of the depositional environment where the spheroidal pyrite aggregates developed, we confirm that the spheroidal aggregates are the result of nano-micro crystalline gathering and growth occurring by the following sequence of processes:nano-crystalline nucleation and growth, gathering into a ball, oriented growth of microcrystals, continuous accumulation, and adjustment of grain boundaries. The formation of the spheroidal pyrite aggregates in the late Qiziqiao Formation of the Middle Devonian occurred in a neutral to weak alkaline and reductive sedimentary environment in the normal oxygen-rich shallowwater carbonate platform edge. The variations in the S/Fe ratio and crystallisation characteristics indicate that during pyrite crystal growth, the sulphur fugacity was high locally and rose constantly, the degree of supersaturation decreased locally and the growth environment was stable relatively. | GAO Shang HUANG Fei GU Xiangping LI Xiangyou MENG Lin LIU Rui SUN Li GAO Wenyuan YU Huantao | 2014 | Acta Geologica Sinica(English Edition)2014，88，6： | 2 |
| 5 | REE geochemistry of gangue minerals and their geological significance in the Muli antimony ore deposit in Yunnan, China显示文摘The Muli antimony deposit is located in the Au-Sb polymetallic metallogenic belt in south-eastern Yunnan,China.In this paper,we investigated the concentrations of trace elements in gangue minerals,mainly calcite,quartz,and pyrite,which were formed at different metallogenic stages.Meanwhile,the host rocks,predominantly composed of limestone,are also analysed for comparison.The calcite from the Nadan ore section is enriched with medium-heavy rare earth elements(M-HREEs),likely due to the presence of a high concentration of Fe and Mn impurities,which results in the preferential enrichment of M-HREEs in the calcite.Alternatively,the calcite may be precipitated from the M-HREE・rich granitic leaching fluid.In the Muli ore section,both quartz and pyrite in the metallogenic period show enrichment with light rare earth elements(LREEs),and the wall rock is also enriched with LREEs,which indicates that the wall rock material was involved in the metallogenic process.The W-shaped tetrad effect of quartz in the late metallogenic stage was interpreted to determine extensive flu id-rock interactions in highly fractionated Si-rich systems.Fe and Mn impurities cause M-HREE to be preferentially enriched with calcite to some extent.Whether mineralization is related to granite deserves further study.Eu and Ce anomalies of different types of gangue minerals indicate that the temperature and the fO2 were constantly changing during mineralization,and the temperature of the main ore-stage was higher than 200°C in an oxidized state.The various REE patterns,LREE/HREE and(La/Yb)N values,reveal that there may be multi-sources and multi-stage hydrothermal activities in the Muli antimony deposit.The REE distribution patterns of minerals are likely interfered with by many internal and external factors.Studies on REE characteristics of calcite,quartz,pyrite and limestone in the Muli antimony deposit have greatly improved the understanding of ore-forming fluids.When we traced the origin and evolution of ore・forming fluids by means of mineral REE distribution patterns,in addition to the determination of inclusions of ore minerals related to mineralization and the in situ analysis methods performed by LA-ICP-MS,we should also com・bine the REE characteristics of various minerals or trace the ore-forming fluids with multiple methods. | Zhenchun Han Jiasheng Wang Chao Li Kaidi Qiao Jinyang Chang | 2019 | Acta Geochimica2019，38，6： | 0 |
| 6 | 11000-Year Record of Trace Metals in Sediments off the Southern Shandong Peninsula in the South Yellow Sea显示文摘Geochemical background values are the normal concentration of trace metals in the natural environment and sediment cores have been proved to be excellent samples to get these values.The trace metal(Cu,Pb,Zn,Cr,Cd,As,Hg,Ni,Li,and Co)concentration profiles along a sediment core are investigated to get the background values and to assess the depositional processes and contamination levels off the southern Shandong Peninsula,China.All the metals,except As and Hg,had similar concentration profiles with the highest average values during the period of 6-3 kyr.The high concentrations of As and Hg occurred before 6ka and during the period of 3-0 kyr.The difference in metal concentrations before and after 6 kyr was mainly attributed to the source of core sediments,which are derived from proximal sediment on the Shandong Peninsula before 6 kyr and the mixture of proximal sediment and Yellow River sediment after 6 kyr.The effects of particle size and human activity were mainly contributed to the metal concentrations since 6 kyr.The average concentrations of trace elements in sediments between 6 and 3 kyr were selected as background values.The principal component factor analysis indicate that the metals were from the natural sources throughout the observed depositional period,with the exception of As and Hg,which may had anthropogenic sources for the sediments from the bottom 2 m of the core.Their geoaccumulation indices indicate that the sediments were not contaminated for Cu,Zn,Cr,Cd,Pb,Ni,Li and Co,whereas they were contaminated recently for As and Hg due to the regional civilization and human activities. | QIU Jiandong LIU Jinqing LI Meina CAO Ke WANG Shuang YUE Nana | 2020 | Journal of Ocean University of China2020，19，6： | 0 |
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