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Journal of Earth Science 2021年第2期32卷 415-426页

作者： Yongliang Chen Shicheng Wang Qingying Zhao guosheng sun College of Earth Sciences Jilin UniversityChangchun 130061China Institute of Mineral Resources Prognosis on Synthetic Information Jilin UniversityChangchun 130026China

Isolation forest and elliptic envelope are used to detect geochemical anomalies,and the bat algorithm was adopted to optimize the parameters of the two *** two bat-optimized models and their default-parameter counterparts were used to detect multivariate geochemical anomalies from the stream sediment survey data of 1:50000 scale collected from the Helong district,Jilin Province,*** on the data modeling results,the receiver operating characteristic(ROC)curve analysis was performed to evaluate the performance of the two bat-optimized models and their default-parameter *** results show that the bat algorithm can improve the performance of the two models by optimizing their parameters in geochemical anomaly *** optimal threshold determined by the Youden index was used to identify geochemical anomalies from the geochemical data *** with the anomalies detected by the elliptic envelope models,the anomalies detected by the isolation forest models have higher spatial relationship with the mineral occurrences discovered in the study *** to the results of this study and previous work,it can be inferred that the background population of the study area is complex,which is not suitable for the establishment of elliptic envelope model.

关键词： bat algorithm isolation forest elliptic envelope receiver operating characteristic curve analysis geochemical anomaly detection

Discovery of a ~1.37 Ga Granite in the Eastern Part of the Northern Margin of the North China Craton and its Geological Significance

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 563-564页

作者： WEN Kai sun guosheng LIU Zhenghong XU Zhongyuan LI Pengchuan College of Earth Sciences Jilin UniversityChangchun 130061JilinChina

Diabase sills with baddeleyite/zircon U-Pb ages of-1.32 Ga have been found in many areas of the North China Craton(NCC)(Peng,2015).Some researchers have proposed that this magmatic event should be related to the breakup of the Columbia supercontinent.A few studies have reported this period of granitoids only to be present in the Shangdu,*** Sonid Zuoqi areas(Zhang et al.,2012;sun *** et al..2018).This study concerns the first discovery of a-1.37 Ga granite in the southern Jilin Province,in the eastern part of the northern margin of the *** has great significance for the study of the breakup of the Colombia supercontinent,the magmatism of the NCC,and the relationship between the supercontinent and other continents during this period.

关键词： Eastern continent Craton

Diagenesis and Very Low-Grade Metamorphism of the Upper Permian Yangjiagou Formation in Eastern Changchun, China:Evidence from Clay Mineral Geothermobarometers

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1053-1062页

作者： HU Daqian ZHAN Naichen ZHANG Jingtong LI Yang sun guosheng College of Earth Sciences Jilin University

The metamorphic conditions of the Upper Permian Yangjiagou Formation in eastern Changchun, China, were evaluated based on the mineral assemblage, illite crystallinity, illite polytypism,the b dimension of illite, and the chemical composition of chlorite. The pelitic rocks in the Yangjiagou Formation are characterized by illite + kaolinite + chlorite ± mixed-layer chlorite/smectite and detrital quartz + plagioclase. Illite in the formation has a crystallinity of 0.38-0.55 and comprises mixed 2 Mand1 Mpolytypes, indicating a metamorphic temperature of >200℃. Based on the chemical composition of chlorite and the chlorite geothermometer, we estimated diagenetic to very low-grade metamorphic conditions with temperatures of 185℃～204℃. The b dimension of illite varies from 8.992 A to 9.005 *** used a mathematical algorithm to extend Guidotti and Sassi’s(1986) diagram relating illite b dimension with temperature and pressure, and used this diagram, together with illite crystallinity and chlorite chemical composition, to semi-quantitatively estimate the formation pressure at<1.2 kbar. These reveal that the Yangjiagou Formation has experienced very low-grade metamorphism.

关键词： illite chlorite very low-grade metamorphism geothermobarometer Upper Permian eastern Changchun Jilin China

Classification of seamount morphology and its evaluating significance of ferromanganese crust in the central Pacific Ocean

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Acta Oceanologica Sinica 2006年第2期25卷 63-70页

作者： CHU Fengyou sun guosheng MA Weilin LI Shoujun QIAN Xinyan ZHAO Hongqiao Laboratory of Submarine Geosciences of State Oceanic Administration Hangzhou 310012 China Second Institute of Oceanography State Oceanic Administration Hangzhou 310012 China Institute of Marine Mineral Resource College of Geoscience Jilin University Changchun 130026 China

Using the SeaBeam technology, the morphology of seamount and its relation to the formation of cobalt-rich crust in the central Pacific Ocean were surveyed during the cruise in 2003 for marine mineral resources. The result shows that seamounts can be divided morphologically into the spire seamount and the fiat topped seamount. These two types of seamount bear great differences in their landform, lithology and cobalt-rich crust. On the upper portion of the fiat topped seamount, the fiat top and the sharp escarpments are unfavorable to the growth of crust, and, consequently, the crusts here are mostly laminar or gravelly, their thicknesses generally show great variations, and the consecutive ore body often develops in its deep water region. On the spire topped seamount, however, the fiat area is small, and its gradient is constant without large variation from the top to the bottom. This favors the growth of cobalt-rich crust and often leads to consecutive tabular ore body of medium thickness, occurring on the spire topped seamount from the shallow water region to the deep water region. The cobalt-rich crust on the spire topped seamount is much better than that on the fiat topped seamount for the crust abundance, crust coverage and number of ore-occurrences within unit area. Furthermore, the crust on the spire topped seamount is rich in cobalt, nickel, manganese elements of high economic value. Because the crust with high quality ore often occurs in the shallow water region on the spire topped seamount, it can be mined and use more easily in the future.

关键词： central Pacific Ocean spire topped seamount flat topped seamount cobalt-rich crest evaluating significance

Composition and Origin of Ferromanganese Crusts from Equatorial Western Pacific Seamounts

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Journal of Ocean University of China 2015年第2期14卷 217-227页

作者： WANG Guozhi JANSA Luba CHU Fengyou ZOU Can sun guosheng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Department of Earth Sciences Dalhousie University Key Laboratory for Geosciences State Oceanic Administration Chengdu University of Technology College of Earth Sciences Jilin University

In the equatorial western Pacific, iron-manganese oxyhydroxide crusts(Fe-Mn crusts) and nodules form on basaltic seamounts and on the top of drowned carbonate platform guyots that have been swept free of pelagic sediments. To date, the Fe-Mn crusts have been considered to be almost exclusively of abiotic origin. However, it has recently been suggested that these crusts may be a result of biomineralization. Although the Fe-Mn crust textures in the equatorial western Pacific are similar to those constructed by bacteria and algae, and biomarkers also document the existence of bacteria and algae dispersed within the Fe-Mn crusts, the precipitation, accumulation and distribution of elements, such as Fe, Mn, Ni and Co in Fe-Mn crusts are not controlled by microbial activity. Bacteria and algae are only physically incorporated into the crusts when dead plankton settle on the ocean floor and are trapped on the crust surface. Geochemical evidence suggests a hydrogenous origin of Fe-Mn crusts in the equatorial western Pacific, thus verifying a process for Fe-Mn crusts that involves the precipitation of colloidal phases from seawater followed by extensive scavenging of dissolved trace metals into the mineral phase during crust formation.

关键词： ferromanganese crusts biomarker hydrocarbon REE trace element hydrogenous origin

Geochronology, Geochemistry, and Hf Isotopic Compositions of Monzogranites and Mafic-Ultramafic Complexes in the Maxingdawannan Area, Eastern Kunlun Orogen, Western China: Implications for Magma Sources, Geodynamic Setting, and Petrogenesis

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Journal of Earth Science 2019年第2期30卷 335-347页

作者： Jiaming Yan guosheng sun Fengyue sun Liang Li Haoran Li Zhenhua Gao Lei Hua Zhengping Yan College of Earth Sciences Jilin University The Eighth Institute of Shandong Geological Exploration Qinghai Provincial Bureau of Ferrous Metal and Geological Exploration

This paper presents zircon U-Pb-Hf isotopic compositions and whole-rock geochemical data for monzogranites and mafic-ultramafic complexes of the Maxingdawannan area in the western end of the east Kunlun orogenic belt, western China. The data are used to determine the ages, petrogenesis, magma sources, and geodynamic setting of the studied rocks. U-Pb zircon dating indicates that monzogranites and gabbros of the complexes were emplaced at 399 and 397 Ma, respectively. The monzogranites are shoshonitic, with high SiO2, Al2 O3 and total-alkali contents, and low TFeO, MgO, TiO2 and P2 O5 contents. The mafic-ultramafic complexes are characterized by low Si O2 contents. The monzogranites display enrichment in light rare-earth elements(LREE) and large-ion lithophile elements(LILE), depletion in heavy REEs(HREE) and high-field-strength elements(HFSE), and negative Eu anomalies(Eu/Eu*=0.36–0.48). The mafic-ultramafic complexes are also enriched in LREEs and LILEs, and depleted in HREEs and HFSEs, with weak Eu anomalies(Eu/Eu*=0.84–1.16). Zircon εHf(t) values for the monzogranites and mafic-ultramafic complexes range from-6.68 to 1.11 and-1.81 to 6.29, with zircon model ages of 1 812–1 319 Ma(TDM2) and 1 087–769 Ma(TDM1), respectively. Hf isotopic data indicate that primary magmas of the monzogranites are originated from partial melting of ancient lower crust during the Paleo-Mesoproterozoic, with a juvenile-crust component. Primitive magmas of the mafic-ultramafic complexes are likely originated from a depleted-mantle source modified by slab-derived fluids and contaminated by crustal components. Geochemical data and the geological setting indicate that Devonian intrusions in the Maxingdawannan area are related to northward subduction of the ProtoTethys oceanic lithosphere.

关键词： geochronology geochemistry Hf isotopes Maxingdawannan Proto-Tethys Ocean

Geochronology and Geochemical Characteristics of Intrusion in the Jinchangliang Gold Deposit,Inner Mongolia and Their Tectonic Significance

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Acta Geologica Sinica(English Edition) 2015年第6期89卷 1947-1962页

作者： sun Zhenjun sun guosheng YU Henan TIAN Yi LIU Shanli XIANG Zhu MENG Jian XUE Huaiyu LU Lina Department of Earthquake Science Institute of disaster prevention Science and Technology College of Earth Sciences Jilin University Liaoning Survey Academy of Geology and Mineral Resources Geophysical Research Institute of Jilin Province

Discovered and mined in recent years, the Jinchangliang gold deposit has not yet been studied in its genetic type. In this paper, the geological features of ore deposit, S isotopic composition, metallogenic age and elements geochemical of the granite closely related to mineralization were discussed. The results of the geological features of ore deposit and S isotopic composition show that ore-bearing hydrothermal solution was closely related with the intrusion of magmatic. The granite is characteristic of high silica SiO2=72.38%–72.98%, high aluminum and Al2O3=14.22%–14.35%, low calcium CaO=0.16% –0.26%, and low value of FeOT/MgO（6.86–7.73）, and rich in alkalis Na2O+K2O=9.11%–9.24%, suggesting that it is high-K calc-alkaline, highly fractionated, weak aluminum A-type granite. The REE patterns are inclined to right and show intense fractionation between LREE and HREE, without obvious negative Eu anomaly（δEu=0.80–0.84）. The primitive mantle-normalized spidergrams are characterized by depletion of Ba, U, Ta, Nb, Zr, Ti and P, which implies that the granite has the characteristics of the crust-mantle mixing. S isotopes also indicate that the material source of gold deposit is closely related to the granite rocks. The LA-ICP-MS Zircon UPb age of the Damiao rock mass medium-fine grained monzogranite（belonging to the early IndoChina） is（245±1） Ma. It shows that Jinchangliang gold deposit was not formed in Yanshanian, but the early Indo-China. Specifically speaking, the deposit was formed in the collision stage of the North China plate and the Siberian plate.

关键词： Geochemistry LA-ICP-MS zircon U-Pb dating Early Indo-China diagenesis and metallogenic Aohanqi Inner Mongolia

Formation and destruction processes of upper Sinian oil-gas pools in the Dingshan-Lintanchang structural belt, southeast Sichuan Basin, China

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Petroleum Science 2010年第3期7卷 289-301页

作者： Liu Shugen Zhang Zhijing Huang Wenming Wang Guozhi sun Wei Xu guosheng Yuan Haifeng Zhang Changjun Deng Bin State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Sichuan610059 China

The lower Cambrian Niutitang Formation hydrocarbon source rocks at the Dingshan- Lintanchang structure in the southeast Sichuan Basin were of medium-good quality with two excellent hydrocarbon-generating centers developed in the periphery areas, with a possibility of forming a medium to large-sized oil-gas field. Good reservoir rocks were the upper Sinian （Dengying Formation） dolomites. The mudstone in the lower Cambrian Niutitang Formation with a good sealing capacity was the cap rock. The widely occurring bitumen in the Dengying Formation indicates that a paleo oil pool was once formed in the study area. The first stage of paleo oil pool formation was maturation of the lower Cambrian source rocks during the late Ordovician. Hydrocarbon generation from the lower Cambrian source rocks stopped due to the Devonian-Carboniferous uplifting. The lower Cambrian source rocks then restarted generation of large quantities of hydrocarbons after deposition of the middle Permian sediments. This was the second stage of the paleo oil pool formation. The oil in the paleo oil pool began to crack during the late Triassic and a paleo gas pool was formed. This paleo gas pool was destroyed during the Yanshan-Himalayan folding, uplifting and denudation. Bitumen can be widely seen in the Dengying Formation in wells and outcrops in the Sichuan Basin and its periphery areas. This provides strong evidence that the Dengying Formation in the Sichuan Basin and its periphery areas was once an ultra-large structural-lithologic oil-gas field, which was damaged during the Yanshan-Himalayan period.

关键词： Sinian oil-gas pool Dingshan-Lintanchang structural belt Sichuan Basin

践行习近平生态文明思想扛起永定河综合治理与生态修复历史重任——访永定河流域投资有限公司董事长孙国升

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中国水利 2019年第12期 1-2页

作者：马颖卓陈运东孙国升不详永定河流域投资有限公司

永定河横跨内蒙古、山西、北京、天津、河北,全长747km,是首都北京的母亲河,也是串联京津冀地区的生态大动脉。20世纪60年代以来,受多种因素影响,永定河水量减少,河道断流,生态恶化状况严重。2019年3月,黄河水历史性地引入到永定河,局... 详细信息

永定河横跨内蒙古、山西、北京、天津、河北,全长747km,是首都北京的母亲河,也是串联京津冀地区的生态大动脉。20世纪60年代以来,受多种因素影响,永定河水量减少,河道断流,生态恶化状况严重。2019年3月,黄河水历史性地引入到永定河,局部断流几十年的永定河重新流动起来。这一变化,源于永定河综合治理与生态修复重大战略部署的实施,源于水利部统一调度和流域上下游各省(直辖市)的共同努力,同时也与永定河流域投资有限公司的组建运作密切相关。近日,本刊记者专访了永定河流域投资有限公司董事长孙国升。

关键词：永定河流域生态修复综合治理董事长投资生态文明习近平河道断流

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Si上外延的n型3C-SiC欧姆接触研究

固体电子学研究与进展 2005年第4期25卷 489-493页

作者：尚也淳刘忠立孙国胜中科院半导体所微电子研发中心北京100083

用LPCVD在Si(111)上异质外延了n型3C-SiC,并在所外延的3C-SiC上蒸发Au/Ti,通过不同温度下的RTA(快速热退火)形成欧姆接触。用两种不同的传输线模型对Ti/3C-SiC欧姆接触的ρc(比接触电阻率)进行测量,在750°C退火后Ti/3C-SiC的ρc达到了... 详细信息

用LPCVD在Si(111)上异质外延了n型3C-SiC,并在所外延的3C-SiC上蒸发Au/Ti,通过不同温度下的RTA(快速热退火)形成欧姆接触。用两种不同的传输线模型对Ti/3C-SiC欧姆接触的ρc(比接触电阻率)进行测量,在750°C退火后Ti/3C-SiC的ρc达到了最低值为3.68×10-5Ω·cm2,这满足了应用的要求。AES分析结果还表明由于Ti的氧化,更高温度下的退火会使ρc增大。

关键词： 3C—SiC 欧姆接触传输线模型比接触电阻率