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Science china Earth Sciences 2006年第11期49卷 1135-1146页

作者： LIN Fangcheng1,2.& PAN Guitang2.1. Geoscience College, chengdu University of Technology, chengdu 610059, {2. 2. chengdu institute of geology and mineral resources, chengdu 610082. china Geoscience College Chengdu University of Technology Chengdu China chengdu institute of {2. and mineral resources Chengdu China

A number of lead-zinc sulphide deposits have been discovered in recent years in dolo- mitic rocks of the Upper Sinian Dengying Formation in the Dadu River valley region, Sichuan Province, china. The lead-zinc mineralization is closely associated with a black siliceous exhalite that has been traced over 50 km of strike. This makes Dadu River valley the most extensive stratiform non-ferrous sulphide horizon having been discovered to date in china. In a previous study by the first author (LIN), these deposits were recognised as belonging to the broad spectrum of lead-zinc sedimentary exhala- tive (SEDEX) deposits. In this paper, seismites and seismogenetic structures occurring in close association with the Dadu River valley mineralized zone are described. The close spatial and temporal relationship between the seismites and mineralization provides strong evidence for the hypothesis that the lead-zinc SEDEX deposits formed in direct response to earthquake activities around the Sinian-Cambrian boundary. The earthquakes are postulated to be an effective dynamic mechanism for triggering the upward migration of deep circulating ore fluids along synsedimentary growth faults and their exhalation onto the sea-floor to form the extensive deposits of stratiform lead-zinc sulphide ore.

关键词： seismites, earthquake, lead-zinc deposit, hydrothermal exhalation, Upper Sinian Dengying Age.

Constructing globally consecutive 3D conductive network using P-doped biochar cotton fiber for superior performance of silicon-based anodes

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Journal of Materials Science & Technology 2024年第6期173卷 181-191页

作者： Jun Cao Jianhong Gao Kun Wang Zhuoying Wu Xinxin Zhu Han Li Min Ling chengdu Liang Jun Chen Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China institute of Zhejiang University-Quzhou Zheda Road 99Quzhou 324000China

The inferior conductivity and drastic volume expansion of silicon still remain the bottleneck in achieving high energy density Lithium-ion Batteries(LIBs).The design of the three-dimensional structure of electrodes by compositing silicon and carbon materials has been employed to tackle the above challenges,however,the exorbitant costs and the uncertainty of the conductive structure persist,leaving ample room for ***,silicon nanoparticles were innovatively composited with eco-friendly biochar sourced from cotton to fabricate a 3D globally consecutive conductive *** network serves a dual purpose:enhancing overall electrode conductivity and serving as a scaffold to maintain electrode *** conductivity of the network was further augmented by introducing P-doping at the optimum doping temperature of 350℃.Unlike the local conductive sites formed by the mere mixing of silicon and conductive agents,the consecutive network can affirm the improvement of the conductivity at a macro ***,first-principle calculations further validated that the rapid diffusion of Li^(+)is attributed to the tailored electronic microstructure and charge rearrangement of the *** prepared consecutive conductive Si@P-doped carbonized cotton fiber anode outperforms the inconsecutive Si@Graphite anode in both cycling performance(capacity retention of 1777.15 mAh g^(-1) vs.682.56 mAh g^(-1) after 150 cycles at 0.3 C)and rate performance(12.4.2. mAh g^(-1) vs.370.2. mAh g^(-1) at 2.0 C).The findings of this study may open up new avenues for the development of globally interconnected conductive networks in Si-based anodes,thereby enabling the fabrication of high-performance LIBs.

关键词： 3D conductive network Biochar carbon-silicon anode Heteroatoms doping strategy DFT calculation Lithium-ion battery

Genesis and district mineralization model of lead-zinc deposits from the eastern margin of Kangdian axis

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Chinese Science Bulletin 1999年第S2期44卷 74-77页

作者： GUAN Shiping and LI Zhongxiong chengdu institute of {2. and mineral resources, chengdu 610082. china chengdu institute of {2. and mineral resources Chengdu 610082 China

SITUATED on the eastern margin of Kangdian axis the lead-zinc mineral belt is an important mineral occur- rence of lead-zinc in southwestern {2.. It is 1 2.0 km in length from Kangding in Sichuan Province tonortheastern Yunnan Province, and 500 km in width from west to east. There are four large deposits,fourteen middle deposits and many small deposits or mineralized spots. Famous large deposits such as Doliangzi, Tianbaoshan, Chipu and Kuangshanchang are distributed in this belt. 1 Geological setting There are many mineral-bearing strata in carbonate-hosted lead-zinc deposits of this mineral belt,such as Dengying formation （Zbdn）, Longwangmiao formation （2./sub> l） Erdaoshui formation （ 3 e ）,Daqing formation（O2./sub> d ）, Daguan formation （S2./sub>d ）, the lower Devonian and Baizuo formation （ C1 b）.

关键词： genesis district mineralization model lead-zinc deposits Kangdian axis.

THE DEFLUIDIZATION OF THE ROCKS AND GENESIS OF GOLD DEPOSITS DURING DEFORMATION AND METAMORPHISM: AN EXAMPLE FROM THE JINPING MOUNTAIN

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地学前缘 2000年第S1期7卷 411-412页

作者： Li Sheng(chengdu institute of {2. and mineral resources, chengdu, 610082.china)

The Jinping mountain region on the western margin of the Kang\|Dian axis is situated in the area bordered by the eastern margin of the Qinghai—Xizang Plateau on the west and the western margin of the Yangtze plate on the east, and consists of three\|layer structures: basement (Kang\|Dian axis), detachment zone (sliding surface of lateral extension and thrusting) and the overburden of the Jinping mountain nappe. The intense intracratonic deformation and metamorphism within the Kang\|Dian axis resulted in the activation, migration and enrichment of mineral elements and finally the formation of ore deposits in the Jinping mountain region. As for the Kang\|Dian axis as the crystalline and folded basement, the lower background values ((0 4～0 8)×10 -9 ) of the element Au don’t represent the initial contents, which have mostly been activated and moved away.. In the Lizhuang\|Lawo\|Bazhe zone as the detachment structural zone, the high er background values ((6～10)×10 -9 ) of the element Au don’t represent the initial contents as well, which have received more gold from the multistage ductile shear zones in the detachment zone. As a result of the lower degrees of deformation and metamorphism within the overburden of the Jinping mountain nappe, the lower temperatures and pressures are insufficient to activate and migrate the element Au; the Au contents available represent the initial Au contents ranging between 1 6 and 2.10 -9 , which are equal to the crustal clarke values from Li Tong and Dai Wentian. The activation and migration of the element Au are believed to be governed by the temperatures and transported media especially variable valent elements and their compounds (principally H 2., Cl, CO 2., S and Fe). The associated sediments are also correlated with the transported media especially the valence numbers of the above\|mentioned multivalent elements. The element Au often behaves as a liquid phase element and a multivalence\|phile element in the course of deformation a

关键词： defluidization source bed basement detachment zone of ext ension and thrusting (slide surface) overburden

STRATIGRAPHIC AND DEPOSITIONAL FILLING MODEL OF NORTH TARIM FORELAND BASIN SYSTEM

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地学前缘 2000年第S1期7卷 340-341页

作者： Wang Longzhang[WT5,5”BX](chengdu institute of {2. and mineral resources, CGSA, chengdu 610082.china)

A stratigraphic and depositional filling modal of Triassic—Jurassic North Tarim foreland basin system is erected, through synthetic analysis of geological setting, depositional provenance, sequence stratigraphy, and quantitative tectonic stratigraphy. The result suggests that the major factors controlling formation and evolution of the system are oblique collision and convergence of different plates, and favorite hydrocarbon plays is *** geological setting analysis emphasizes the historical succession of the foreland basin system formation and evolution. The tectonic setting analysis sketchy outlines formation of the system and tectonic setting of its successive evolution. The sedimentary geology analysis reveals the uplift and subsidence of the basin basement a seesaw style movement.

关键词： foreland basin system filling model North Tarim Triassic and Jurassic

SPACE-TIME TEXTURE AND TECTONIC EVOLUTION OF QAMDO BLOCK IN EAST TIBET

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地学前缘 2000年第S1期7卷 175-177页

作者： Wang Mingjie, Wang Gaoming[WT5,5”BX](chengdu institute of {2. and mineral resources,chengdu 610082.china)

Qamdo block in the east Tibet lay in front of southwestern margin of the Yangtze landmass and was one of many micro\|blocks between the Gondwana and the Eurasia continents .It played an important role in the development of the multi\|arc\|basin system of the north sector of the Jinsha\|lancang\|nujiang rivers . Space\|time texture of the block reflected the tectonic evolution of the east Tibet and neighbouring areas directly, providing important information for evolutionary history of the east Tethys.1\ Crustal structure of the Qamdo block\;Crustal structure of the Qamdo block is characterized by “double basement and double cover”.By double basement is meant the Middle—Upper Proterozoic crystalline basement and the Lower Paleozoic folded basement. The Middle—Upper Proterozoic crystalline basement is composed of medium\|high\|grade metamorphic biotite\|plagiogneiss, plagioclase\|amphibole schist, nacritid intercalated with (intermediate\|) basic metavolcanite. These rocks are characteristic of strong ductile deformed metamorphic core complex. The zircon of gneiss yields an U\|Pb age of 1680～2.00Ma while the basic metavolcanite give a Sm\|Nd age of *** Lower Paleozoic folded basement consists of the Lower Ordovician and Silurian. Basement of the Qamdo block is similar to that of the Yangtze landmass. By double cover we mean two covers consisting of the Upper Paleozoic and Mesozoic, respectively. The Upper Paleozoic is composed of carbonate and clastic rock which were formed from epicontinental to back\|arc basins. The Mesozoic consists of the Upper Triassic—Cretaceous concordant formations which were formed in a back\|arc foreland *** of the formations are molasse, neritic carbonate, paralic coal\|bearing rock and terrigenous red clastic rock from the bottom to the top.

关键词： East Tibet Qamdo block time\|space texture structural evol ution

Sequence Boundary and Sea Level Changes in Western Margin of Upper Yangtze Platform during Permian and Triassic

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Journal of Earth Science 1996年第1期15卷 105-111页

作者： Xu Xiaosong Liu Baojun Zhao Yuguang (chengdu institute of {2. and mineral resources, CAGS, chengdu 610082.

During Permian and Triassic the western margin of Upper Yangtze platform had experienced an evolution from early rift stage to thermal subsidence and then to foreland basin. The tectonic transformations have resulted in five supersequences and nineteen third-order se- *** the rift stage,transgeressive carbonate platform was built up,while in the thermal subsidence stage,regressive carbonate platform with foreslope was *** closure of the Garze-Litang narrow oceanic basin resulted in the migration of foreland flexure toward the *** carbonate ramp in foreland basin setting was formed during the relative sea level rise which was caused by the change in basin volume.

关键词： Upper Yangtze platform Permian Triassic sequence boundary eustasy.

DISCOVERY AND THE IMPLICATION OF A HYDROTHERMAL-METASOMATIC SKARN DEPOSIT IN GANGDISE TECTONIC ZONE,TIBET

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地学前缘 2000年第S1期7卷 143-144页

作者： Yao Peng 1,Li Jingao 2.WT5,5”BX](1 chengdu institute of {2. and mineral resources,chengdu 610082.china 2.BGMR,Tibet,china)

Hydrothermal activity from a hydrothermal circulatory system is a special geological event, it is of importance to the formation of some massive sulfide deposits (hydrothermal deposits). The Authors think that Jiama polymetallic ore deposit in Gangdise tectonic zone, Tibet is a special skarn deposit i.e. a “hydrothermal\|metasomatic skarn deposit" bound up with benthonic hydrothermal circulatory system. Its important characteristics are as follows: 1 Evolution of the Gangdise island arc in studied area may be divided into three stages Middle Jurassic volcanic arc stage; Middle—Late Jurassic and Early Cretaceous inter arc sedimentary basin stage; and Eogene magmatic arc stage. The deposit is confined to the inter arc sedimentary basin. Existing data indicate that the volcanic arc provided Jiama deposit with abundant ore\|forming material; the inter arc sedimentary basin provided Jiama deposit with absolutely necessary space; the magmatic arc created reconcentration condition for the Jiama deposit.

关键词： skarn deposit hydrothermal circulatory system discovery implication

MANTLE SOURCE NATURE OF ORE FLUIDS FOR THE JINDING Pb-Zn DEPOSIT, LANPING, YUNNAN

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地学前缘 2000年第S1期7卷 419-420页

作者： Zhang Lisheng, Yu Qian, Mou Chuanlong[WT5,5”BX](chengdu institute of {2. and mineral resources, chengdu 610082.china)

Geological setting\;Jinding superlarge Pb\|Zn deposit lies in the Lanping basin between the Lancangjiang fracture zone and the Jinshajiang\|Ailaoshan fracture zone. The Lanping basin is a Meso\|Cenozoic rifting basin whose basement consists of the Paleozoic strata. Mesozoic paralic and continental sediments with a thickness of about 2.000m deposited in the basin. In the Paleocene, gypsum\|salt\|bearing strata with a thickness of more than 1000m accumulated. In the Cenozoic, collision of the Indian plate with the Eurasian plate resulted in strong folding and napping and subsequent extensions in the Oligocene and Pliocene. The extensions were responsible for alkaline magmatic intrusion in the centre and alkaline magmatic extrusion in the *** is well developed. N\|S\|trending Bijiang fault with a length of 12.km links with the Jinshajiang fracture zone in the north and with the Lancangjiang fracture zone in the south, controlling on the Cenozoic Lanping rifting basin and acting as passage\|way for ore fluids.

关键词： Jinding Pb\|Zn deposit mantle source ore fluid

PETROLOGY AND GEOCHEMISTRY OF CENOZOIC VOLCANIC ROCKS FROM THE CENTRE OF QIANGTANG,TIBET

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地学前缘 2000年第S1期7卷 170-171页

作者： Tan Fuwen, Pan Guitang, Xu Qiang[WT5,5”BX](chengdu institute of {2. And mineral resources, chengdu 610082.china)

The Cenozoic volcanic rocks in Qinghai—Tibetan plateau mainly occur in Qiangtang, Kunlun,Kokshili and eastern Tibet to the north of Bangong\|Nujiang suture. The study area locates in the centre of Qiangtang (N34°00′\|34°50′;E87°30′\|89°00′),where is nearly a blank area of geological *** pieces of samples from Hehulin,Luanqingshan,Bandaohu and Donghu show that the K\|Ar ages of the Cenozoic volcanic rocks range from 32.6 to 44 1Ma, which are elder than the Cenozoic volcanic rocks from Kunlun,Kokshili and eastern *** are two types of occurrence for the volcanic rocks: volcanic lava and sub\|volcanic rock. The lava is dark grey, light purple or dark purple and unconformably covers up on the Jurassic,which interbeds with purplish red tertiary sandstone and pebble\|bearing sandstone and contains a small amount of phenocrysts (andesine,pyroxene,amphibole and biotite). three craters and four volcanic necks have been found in this area. The sub\|volcanic rocks expose as volcanic necks with appearance of isolated peaks,which intrude into Jurassic. The rocks,appearing grey white to light grey, have trachytic texture with the phenocrysts of plagioclase,biotite and amphibole. Besides above rocks,there are some lamprophyre dikes intruding into grey white tertiary lacustrine algal limestone in this area with its length up to 2.m and width 3m. The rocks appear dark grey or dark green and contain the phenocrysts of pyroxene,orthoclase,biotite,olivine,and leucitite.

关键词： Tibet volcanic rocks geochemistry REE