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  • The discovery of palynopollen assemblage from Wanbao Formation of East Ujimqin Banner in Xilingol City,Inner Mongolia,and its geological significance
    WEI Yi, YANG Bing, GE Mengchun, YANG Xinjie
    Abundant sporopollen fossils,which include 38 genera and 82 species,were found for the first time from the upper part of Wanbao Formation in Guolebangou section in East Ujimqin Banner of Xilingol City,Inner Mongolia.In the Cyathidites-Quadraeculina-Neoraistrickia assemblage,the early Middle Jurassic sporopollen species are relatively commonly seen.According to the contrasting with things of other regions,this set of strata should be separated from the original Damoguaihe Formation of Cretaceous and assigned to early Middle Jurassic.Based on the study of the ecological habits of sporopollen assemblage of Wanbao Formation,it is held that the palaeovegetation types in the study area during this period were coniferous-leaved and broad-leaved mixed forest,and the paleoclimate belonged to the semi-arid to semi-humid subtropical climate,which was slightly humid.In addition,the features of sporopollen assemblage were very similar to those of the sporopollen assemblage in whole northern China during the first Jurassic heating event,which seems to have been the palaeovegetation response to the first Jurassic heating event in northern China.
    2020  .  39(5):    599-607    [摘要](141)    [PDF](142)
  • Age,Hf isotopes and geochemistry of Early Cretaceous granodiorite-porphyry in the middle segment of Bangong Co-Nujiang suture zone of Tibet
    WANG Jiaxing, LIU Zhibo, LI Haifeng, WANG Chao, ZHANG Kaijiang, SUN Miao
    Early Cretaceous igneous rocks are widely distributed in the middle segment of Bangong Co-Nujiang suture zone,and the nature of magma source and petrogenesis of these rocks are of great significance for the closure of the Bangong Co-Nujiang Ocean. The authors carried out systematic petrographic,geochemical and isotopic studies of the granodiorite-porphyries from Dongkaco microcontinent,middle segment of the Bangong Co-Nujiang suture zone.The results show that the granodiorite-porphyries have the age of 109.4±1.9 Ma by zircon U-Pb dating method,and granodiorite-porphyries are characterized by high K calc-alkaline series,enrichment of SiO2,Al2O3 and depletion of Mg#.The content of ∑REE is relatively low(196.45×10-6~207.6×10-6)and the rocks are relatively enriched in LREEs and depleted in HREEs. In the spider diagram the trace elements are inclined to the right in zigzag form and display enrichment of large-ion lithophile elements and relative depletion of high field strength elements.The granodiorite-porphyries have negative zircon εHf(t) values(-4.21~-10.59),corresponding to crustal Hf model ages of 1438~1842 Ma and showing the characteristics of the ancient crust.Combining the above characteristics with regional information,it is believed that the granodiorite-porphyries were found in the Dongkaco microcontinent and belonged to I-type granite,which may be the product of magmatic activity caused by the oceanic fragmentation during the collision between the Dongkaco micro-continent and the Central Lhasa or Nie Rong terrane.
    2020  .  39(5):    608-620    [摘要](101)    [PDF](101)
  • LA-ICP-MS zircon U-Pb age and geological characteristics of the Early Jurassic potassium porphyritic granites in Kargang area,eastern Tibet
    YU Tao, XU Jiali, GAO Qiang, FAN Bingliang, XU Changhao
    In this paper,LA-ICP-MS zircon U-Pb age test was carried out on the potassium porphyritic granites in the Kargang area,which shows that the 206Pb/238U age weighted average value of the rock mass is 178±2 Ma(MSWD=3.7,n=20),suggesting a product of Early Jurassic.The geochemical characteristics of the rocks show that the rocks have alkali-rich potassium(K2O+Na2O=8.02%~8.76%,K2O/Na2O=1.71~2.11),but low aluminum(Al2O3=14.08%~14.73%,A/CNK=1.01~1.04),without pyroxene and with lower corundum molecules.The rocks are generally characterized by rich Rb,Th,K,U and other large ionic pro-stone elements,obvious loss of Ba,Nb,Sr,P,Ti and other elements,and very low values of high field strength elements Zr,Nb,with(Ga/Al)×104 values of 4.48~5.06 and Rb/Sr ratios of 1.84~2.29,which shows the characteristics of high magma differentiation;in addition,the formation of rocks was related to subduction reduction,and its tectonic environment changed gradually from extrusion environment to relative stretching environment,accompanied by the decrease of deep crustal pressure,which led to the upwelling of mantle source magma and the partial melting of the overlying crust.
    2020  .  39(5):    621-630    [摘要](113)    [PDF](128)
  • The discovery of Early Triassic volcanic rocks in Zhanhongshan area of Qinghai Province in the eastern section of East Kunlun Mountain and its geological significance
    ZHANG Xinyuan, LI Wufu, OUYANG Guangwen, WANG Chuntao, CHEN Haiqing
    During 1:25000 regional geological and mineral resources survey in Zhanhongshan area of Gouli Township,Dulan Country,Eastern Kunlun Mountain,conducted by the authors,a set of Early Triassic volcanic rocks was mapped.The rocks consist mainly of a set of acidic volcanic rocks with local limestone assemblage,characterized by marine eruption.The main elements of volcanic rocks suggest weakly peraluminous rocks such as medium-K to high-K calc-alkaline series,assuming LREE-enriched pattern.The REE distribution pattern shows medium Eu anomaly,enrichment of LILE K,Rb,Ba and Th and depletion of HFSE Ti,Nb and Ta.The tectonic environment shows characteristics of island arc volcanic rocks.The zircon LA-ICP-MS U-Pb age of rhyolite is 244.1±1.8 Ma.It is believed that the volcanic rocks were formed in the Early Triassic.Combined with regional tectonic evolution of East Kunlun,it is considered that the acidic volcanic rocks in the Zhanhongshan area were associated with large-scale island-arc granites in the eastern part of East Kunlun,and they were formed by magmatic activity during the northward subduction of the Early Triassic in Animaqin of Paleo-Tethys Ocean.It seems to be a fine example of volcanic activity during the Late Permian to Early Triassic in the East Kunlun area after the discovery and establishment of the Late Permian Dazaohuo Formation in the middle part of the East Kunlun Mountain.
    2020  .  39(5):    631-641    [摘要](86)    [PDF](75)
  • LA-ICP-MS zircon U-Pb ages of andesic tuffite from Bayan Har Group,Heishi North Lake area,west Kunlun,Xinjiang
    TANG Mingying
    Using LA-ICP-MS method,the authors conducted zircon U-Pb isotopic dating of andesite tuffite of Bayan Har Group in the Heishi North Lake area,west Kunlun,Xinjiang.The results show that,after removing the 4 points with obvious U depletion,the weighted 206Pb/238U age of the remaining 10 measurement points is 252.9±9.1 Ma,which represents the formation time of the magmatic material of andesic tuffite,and the age suggests Late Permian-Early Triassic period.However,the formation of the andesic tuffite was usually later than the eruption,so the volcanic interlayer was formed in the Early Triassic.The discussion on andesic tuffite provides new evidence for the further study of the material composition and formation age of Bayan Har Group in this area.
    2020  .  39(5):    642-646    [摘要](78)    [PDF](75)
  • Geochemistry and Nd-Hf isotopes of the Early Permian volcanic rocks in Hangwula of northern Alxa area and their tectonic significance
    LI Runwu, ZHANG Xin, SHI Qiang, CHEN Wanfeng, AN Yi, HUANG Yaoshen, LIU Yixin, WANG Jinrong
    Volcanic rocks of Fangshankou Formation are widely distributed in Hangwula area on the northern side of Engger Us ophiolitic belt in the Alxa area.These rocks are very essential for interpreting tectonic evolution of the southern part of Central Asian orogenic belt.Early Permian rocks in this stratum mainly consist of grayish green andesite and andesitic breccia lava,partly with agglomerate.The andesite has SiO2 content of 54.23%~60.81%,Al2O3 content of 13.67%~15.96%,MgO content of 4.26%~5.76%,and Mg# of 42~50 with the content of Na2O(2.21%~3.48%)less than that of K2O(2.51%~3.49%).These rocks also have high TFe2O3(7.98%~11.24%)and low CaO(2.52%~3.36%)as well as TiO2(0.75%~1.32%).They should be peraluminous calc-alkaline rocks.Andesite samples are enriched in light rare earth elements(LREE)and depleted in heavy rare earth elements(HREE).The differentiation between LREE and HREE is not obvious with(La/Yb)N equal to 3.73~9.86.Samples show negative Eu anomalies with δEu being 0.52~0.75.The chondrite-normalized REE patterns are similar to E-MORB.The samples of andesite are enriched in such elements as Rb and K and depleted in such elements as Nb,Ta and Ti.What's more,they have εNd(t)=-4.3~-14.2 and εHf(t)=-19.8~+1.4.These characteristics suggest that andesites were sourced from mixing of the mantle and the crust and formed in intraplate rift.Considering a lot of geological materials related to this area,the authors conclude that the branch of the PAO(Paleo-Asian Ocean)represented by Engger Us ophiolitic belt had been closed before Late Carboniferous,and that,during Late Carboniferous to Early Permian,magmatic activities in the study area occurred in an intraplate extensional setting.
    2020  .  39(5):    647-658    [摘要](87)    [PDF](73)
  • LA-ICP-MS zircon U-Pb age of the volcanic rocks of the Lower Cretaceous Yixian Formation in the Xiushui basin of northern Liaoning Province and its geological significance
    LI Xiaohai, CHEN Shuwang, DING Qiuhong, LI Wenbo, ZHANG Jian
    In order to ascertain the hydrocarbon source strata age of Xiushui basin,LA-ICP-MS zircon U-Pb dating was conducted on the sub-volcanic rocks that was emplaced in the third member of Yixian Formation sedimentary strata in Xiu-D1 well and developed on the surface,which yielded an age of 121.5±1.2~121.3±3.5 Ma,indicating that the sub-volcanic rocks were formed in Early Cretaceous.In comparison with the volcanic rocks in the surrounding areas,the study of isotopic chronology shows that the volcanic rocks in Xiushui basin were formed during the volcanic activity at the end of the formation of Yixian Formation.The determination of the age defines not only the upper age limit(121.3 Ma)of the formation of volcanic rocks but also the upper age limit(121 Ma)of the main hydrocarbon source rocks(the third member of Yixian Formation)in Xiushui basin.The third member of Yixian Formation is an important oil and gas exploration target series in northwest Liaoning Province.It provides a new target series for oil and gas exploration in the peripheral fault basin group of Songliao basin.
    2020  .  39(5):    659-669    [摘要](79)    [PDF](96)
  • LA-ICP-MS zircon U-Pb age and geochemical characteristics of Neoarchaean metamorphic plutonic rocks in Kaiyuan area of northern Liaoning Province
    PENG Youbo
    Located in the Kaiyuan area of northern Liaoning Province on the northern margin of North China,the Neoarchaean metamorphic plutonic rocks are mainly composed of monzonitic granitic gneiss,granodioritic gneiss and quartz dioritic gneiss.According to LA-ICP-MS zircon U-Pb dating,they were formed in Neoarchaean,with the 207Pb/206Pb age of 2489.6±9.1 Ma.Neoarchean metamorphic plutonic rocks belong to high-K calc-alkaline-potassium basalt,quasi-aluminium-peraluminous rock series,and are enriched in LREE and relatively depleted in HREE,characterized by partial melting of the lower crust or Archean sedimentary rocks.Based on an analysis of petrology,petrogeochemistry,tectonic environment and emplacement mechanism,and combined with the study of tectonic evolution in adjacent areas,it is considered that the metamorphic plutonic magma in Kaiyuan area of northern Liaoning came from relatively shallow local melting of basic paleocontinental crust.Geotectonic location was in the contact zone between oceanic crust and continental crust,which indicates that there might have been collision and accretion of continental crust near Qinghe fault in Neoarchean.The diorite-quartz diorite-granodiorite-monzogranitic gneiss body shows that the continental crust has undergone a long period of accretion and continental activity,and has changed from the early basic continental crust to the present silica-alumina continental crust.
    2020  .  39(5):    670-680    [摘要](76)    [PDF](64)
  • LA-ICP-MS zircon U-Pb dating and geochemical characteristics of the Jiaogou syenite in western Henan Province and its geological implications
    LIANG Tao, LU Ren, LU Xinxiang, WEN Jingjing
    The Zhifang-Huangzhuang(ZH)area in western Henan Province has the largest outcrop of Indosinian alkaline intrusives in eastern Qinling orogenic belt.In this paper,the LA-ICP-MS zircon U-Pb ages as well as major elements and trace elements of the Jiaogou syenite were tested in order to obtain new constraint on formation time,rock source of partial melting and tectonic process of syenites in the ZH area.The U-Pb dating sample JG1701 is aegirine-augite syenite,and zircon age spectrum is composed of 7 age groups(~2.6 Ga,~2.5 Ga,~2.4 Ga,~2.3 Ga,~2.1 Ga,~1.9 Ga and~243 Ma).The weighted mean age of 6 zircon spots form the last group is 243.2±4.8 Ma,which suggests that it was formed in Middle Triassic.The Jiaogou syenite is ultrapotassic rocks and belongs to alkaline-peralkaline series with higher Na2O+K2O content(11.50%~14.01%),alkalinity ratios(3.92~9.17)and K2O/Na2O ratios(3.78~10.25).The total rare earth elements(REEs)and(La/Yb)N ratios of the Jiaogou syenite are 176×10-6~315×10-6 and 9.51~20.43,which shows the characteristics of LREE enrichment and HREE depletion without obvious Eu negative anomaly.They are enriched in large ion lithophile elements and depleted in high field strength elements,exhibiting negative anomalies of Th,Nb,Ta,P and Ti and positive anomalies of Ba,K,Zr and Hf in spider diagram.The source rock of the Jiaogou syenite was situated in the garnet-spinel transition zone at the depth of about 60~80 km,and its residual phases included phlogopite,Ti-enriched minerals such as rutile and ilmenite,garnet and spinel.The Jiaogou syenite is the mixed product of mantle-derived K-enriched magmas/fluids and crust-derived magmas/fluids,and it was controlled by regional lithosphere delamination in Middle Triassic.
    2020  .  39(5):    681-691    [摘要](80)    [PDF](83)
  • New discovery of rare and dispersed elements Re,Se ores in Permian Wujiaping Formation of Wangcang area,Sichuan Province
    TANG Wenchun, DUAN Wei, YANG Guibing, HUANG Jian, WANG Huanguo, ZHANG Fei
    Due to extremely scattered characteristics of rare and dispersed elements in the geological body,it is extremely difficult for them to form their own independent deposits.According to the study of prospecting prediction,an independent Re and Se enrichment stratum featuring sedimentation-reformation genesis was first discovered in the first member of Wujiaping Formation in Wangcang,Sichuan.By means of sparse drilling engineering in partial areas,the authors obtained 61.4 tons of rhenium and 3000 tons of selenium resources,which show that there is huge prospecting potentiality of rhenium and selenium.With the characteristics of forming stratified enrichment,the co-existence of V and Mo seams in the same formation,the existence of economical and optional ores and the probable comprehensive recovery of many elements,the area is expected to become an important metallogenic belt of new types of mineralization of shortage emerging strategic resources in China.The deposit shows such characteristics as stability of ore-bearing stratum,uniform mineralization and huge scale.
    2020  .  39(5):    692-697    [摘要](67)    [PDF](69)
  • Isotope geochemical characteristics of the Zhibo iron deposit in western Tianshan Mountains,Xinjiang
    SHEN Lijun, WANG Huaihong, LI Dapeng, ZHU Yuzhen, WANG Yongjun, SUN Chao, SHAO Yubao
    The Zhibo iron deposit is located in eastern Awulale metallogenic belt of Western Tianshan Mountains.The orebodies of the Zhibo iron deposit are hosted in basaltic andesite of the Lower Carboniferous Dahalajunshan Formation in layered,quasi-lamellar and lenticular forms.The mineralization process of the Zhibo iron deposit can be divided into two metallogenic periods,i.e.,magmatic period and hydrothermal period,which consist of three metallogenic stages:magnetite + diopside,magnetite + K-feldspar + epidote and quartz + sulfide + carbonate stages.The geochemical characteristics of the Zhibo iron deposit show that its metallogenic tectonic setting was an island-arc environment.The geochemical data support derivation of volcanic rock and magnetite ore from basaltic magma formed by partial melting of depleted mantle wedge altered by fluids in subduction zones,with the same material source.The Zhibo iron deposit is a magmatic(mainly)-hydrothermal(subordinately)deposit.The basaltic magma intruded upward along deep fault and formed the primitive volcanic rock.Because of the change of physical-chemical conditions during its intrusion,the iron ore slurry was liquidized from the basaltic magma.The intrusion of the iron ore slurry into primitive volcanic rock might have been responsible for the formation of the magmatic type magnetite orebody and the alteration of the surrounding rocks by the residual magmatic hydrothermal fluid for the formation of the hydrothermal type magnetite orebody.
    2020  .  39(5):    698-711    [摘要](61)    [PDF](70)
  • S-Pb isotope characteristics and prospecting model of the Nagengkangqieer silver deposit in the eastern segment of East Kunlun Mountain
    XU Chongwen, WEI Junhao, ZHOU Hongzhi, ZHAO Xu, ZHANG Songtao, LI Wenjun
    The Nagengkangqieer silver deposit is a large-sized hydrothermal vein-type independent deposit expected to become a superlarge silver deposit.Based on the study of geological characteristics of the mining area,the authors investigated the ore-forming material source and the relationship between the two types of magmatic rock and mineralization by studying the S-Pb isotopes of the ore sulfide and the Pb isotope of the monzonitic granite and granodiorite.The δ34S values of the sulfide samples(pyrite,galena and sphalerite)range from -6.1‰ to 3.9‰,mainly from -4‰ to 2.1‰.The concentrated values suggest that the ore-forming material(sulfur source)had the characteristics of deep source magma sulfur.The 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb values of sulfides range from 18.28 to 18.62,15.6 to 15.73 and 38.38 to 39.1,respectively.The LA-ICP-MS zircon U-Pb age of the monzonitic granite in the mining area is 239±1 Ma,and the (206Pb/204Pb)i,(207Pb/204Pb)i,(208Pb/204Pb)i values of the monzonitic granite range from 18.389 to 18.585,15.638 to 15.648 and 38.288 to 38.558,respectively.The LA-ICP-MS zircon U-Pb age of granodiorite is 252±1 Ma,and the (206Pb/204Pb)i,(207Pb/204Pb)i,(208Pb/204Pb)i values of the granodiorite range from 18.348 to 18.447,15.625 to 15.629 and 38.394 to 38.412,respectively.The lead isotope composition plot shows that the ore-forming process had weak relationship with the two types of magmatic rocks,and it had obvious linear correlation with the volcanic rocks of the Erlashan Formation in this area.A comparative analysis of the neighboring Harzhaz lead-zinc-silver deposit which had similar sources of ore-forming materials shows that the sulfur source was identical,and the Pb isotopic composition of the ore exhibits a distinct linear relationship,indicating that the ore-forming materials of the two deposits had the similar source region or evolution process.The ore-forming geological conditions,ore-forming material sources and fluid characteristics of the two deposits indicate that the two deposits are both medium and low temperature hydrothermal vein deposits.On the basis of the research conducted by the authors and previous researchers,the metallogenic model and prospecting model were constructed to provide guidance in search for the same type of silver deposits in this area.
    2020  .  39(5):    712-727    [摘要](72)    [PDF](60)
  • 40Ar-39Ar age of the late stage veins in central Zhuguangshan pluton of South China and its relationship with uranium metallogenesis
    JIANG Hongan, ZOU Mingliang, OUYANG Pingning, WANG Qianlin, LI Jie, YAN Yue
    Late stage dykes like granite porphyry and lamprophyre veins are common around the ore deposits in Lujing area,the central section of Zhuguangshan pluton.K-feldspar 40Ar-39Ar isotope geochronologic analysis indicates that the granite porphyry vein was formed at 116.24±0.49 Ma while the lamprophyre vein intruded at 128.27±0.86 Ma,indicating that their intrusion corresponded to crustal extension magmatism during the Early Cretaceous.The magmatic chronologies recorded by the dykes are consistent with the uranium mineralization age of the Lujing orefield.Both the granite porphyry vein and the uranium ore present the characteristics of mantle source,indicating that the acidic magma source of the former one might have provided not only metallogenic materials but also heat source for uranium mineralization.During the process of uranium mineralization,the basic magma source of the lamprophyre provided favorable conditions such as heat generation,mineralizer,fluid and dynamic conditions for uranium mineralization.
    2020  .  39(5):    728-734    [摘要](53)    [PDF](64)
  • Characteristics of gravity and magnetic fields and deep metallogenic prediction in Xiongershan area,western Henan Province
    WANG Junhe, LI Can, WANG An, WANG Yaosheng, QIN Xueye, CHEN Shumin
    Xionger Mountain area is an important gold,silver,lead,zinc and molybdenum polymetallic mineral deposit area in Henan Province.121 deposits have been identified.It is found that the formation of polymetallic minerals in this area is closely related to the intrusion of Mesozoic intermediate-acid magma.There are concealed rock bodies in the deep part of the area where the existing ore deposits are concentrated.Based on the analysis of the characteristics of gravity and magnetic fields in Xionger mountain area,the intrusion model of concealed rock mass in Xionger Mountain area is established.There are mainly Zhaiwa concealed rock mass in Xionger Mountain Western section,with an area of about 310 km2 and three stepped depths:0~0.8 km,0.8~2 km,2~4 km; Tieluping-Huashan concealed rock mass in the middle part of Xionger Mountain is located between Zhaiwa concealed rock mass and Huashan rock mass,with an area of 184 km2 and a depth of 3~5 km; The Jiuxian-Huashan concealed rock mass in the east part of Xionger Mountain has an area of 338 km2,a depth of 0~1.5 km in the north,and gradually deepening to 1.5~3 km in the south.According to the distribution and zoning characteristics of regional minerals and the intrusion model of concealed rock mass,the deep metallogenic model is predicted.Research shows:there is potential to search for large porphyry molybdenum tungsten copper deposits and large gold deposits in the western Xionger Mountain; The concealed rock mass in the middle section is deep and Mainly searches for low-and medium-temperature minerals; The geological exploration in the eastern section is relatively high,and porphyry-type molybdenum-gold-copper deposits still have potential in the deep part of the deposit.
    2020  .  39(5):    735-745    [摘要](60)    [PDF](93)
  • New progress of the research on the Kemi chromitite deposit in Finland
    ZHANG Weibo, LIU Yifei, WANG Fengxiang, CHEN Xiufa, HE Xuezhou, YU Rui
    The Kemi deposit is the largest chromite deposit in Europe.The authors have summarized its geological setting,orebody features,ore genesis and ore indicators in this paper.The deposit is hosted by early Proterozoic Kemi layered complex,which strikes northeastward along the Svecokarelidic Perapohja schist belt.The chromite deposit in the complex has typical layered accumulation characteristics and the ore layers extend steadily.Due to the low Cr/Fe ratio in ore,its grade belongs to low level among similar ore deposits in the world.Isotopic geochronology evidence suggests that the mineralization age is 2.44 Ga,indicating that the metallogenesis of chromitite deposit occurred in early Paleoproterozoic.During the Karelia orogeny,the chromitite was deposited when the input of magma into the Kemi intrusion was contaminated by salic material from the underlying basement complex.This magma was mixed with the fresh input of primitive magma,resulting in chromite saturation.The chromite crystals were formed during mixing in a plume.The Kemi deposit is a layered type chromitite deposit,and its geological features are different from features of podiform type or stratoid type chromite deposits discovered in China.
    2020  .  39(5):    746-754    [摘要](61)    [PDF](94)
  • Regional geological and mineral resources characteristics of Iceland
    JIANG Zhe, NIE Fengjun, ZHAO Yuanyi, HJALTI Franzson, LIU Chunhua, WANG Fengxiang, ZHANG Weibo
    Located in central North Atlantic Ocean,Iceland is an island lying between the North Atlantic and Greenland Sea.It is the second largest island in Europe.It is an alkaline basalt area,which belongs to the periodic submarine magmatism and submarine volcano eruption resulting from mantle plume upwelling.The island is mainly composed of basalt,and can be divided into four major stratigraphic units,i.e.,the Tertiary unit,the Plio-Pleistocene unit,the Upper Pleistocene unit and the Postglacial unit.The Icelandic volcano fracture system can betectonically divided into three flank zones and four volcanic rift zones.The geothermal resources in Iceland have such features as wide distribution,various types,high temperature,and freshwater nature of the geothermal fluid.In recent years,geological departments have found a series of gold deposits(mineralization spots)in Iceland.Mainly distributed in the coastal areas of Iceland,they can be divided into three metallogenic belts.Being epithermal deposits,the gold deposits have a close relationship with the geothermal system.It should be mentioned that they are very similar to the Axi gold deposit in northern Xinjiang.Based on previous data,this paper introduces the geological features and evolution history of Iceland briefly,and elaborates the distribution of geothermal and gold resources so as to provide a reference for Chinese scientists and technicians.
    2020  .  39(5):    755-764    [摘要](95)    [PDF](221)

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