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Acta Geologica Sinica(English Edition) 2018年第2期92卷 868-869页

作者： GUO Xincheng CHEN Bangxue ZHOU Nengwu GAO Jun ZHENG Yuzhuang no.11 of geological party Xinjiang Bureau of Geology and Mineral Exploration and Development

Objective As the uplift belt on the southem margin of the Tarim block, the Tiekelike block consists mainly of a set of Precambrian metamorphic rocks with granulite and gneisses. The Heluositan group-complex is the most ancient rock series in the area, and is a key area for studying the formation and evolution of the Precambrian basement of the Tarim craton. LA-ICP-MS zircon U-Pb dating and Hf isotopic analysis of granulite in this area provide new evidence for revealing the formation and evolution of the Precambrian basement in the Tarim Basin.

关键词： Hf MS Pb Xinjiang First Report of Zircon U-Pb Chronology and Hf Isotope Evidence of the Heluositan Group Granulite in West Kunlun

The Geochemical Characteristics and Minerogenic Model for the Amo Hypothermal Tin Deposit in Ximeng County, Yunnan Province

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Acta Geologica Sinica(English Edition) 1991年第3期65卷 271-287页

作者： Zhao Daxian Tang Guangting The Fifth geological party, Yunnan Bureau of Geology and Mineral Resources, Simao,Yunnan Liu Linqun The Fifth geological party Yunnan Bureau of Geology and Mineral Resources Sirnao Yunnan

Through studies on the element geochemistry, alteration of country rocks, ore-forming fluids and isotopegeochemistry of the Arno tin deposit in the metamorphic rocks of the Upper Proterozoic Ximeng Group, theauthors consider that the concentration of the B-F-Li-Rb-Cs-Sn association is related to acidic magmatism inthe study area. The Fe-Mg-Li tourmaline in the ore is the replaced product of the country rocks byhypothermal fluid. The δ^(18)O values of mineral separates are +2.01- +13.16‰ and their δ^(34)S values, +2.6-+7.2‰. The ore-forming materials were derived from hydrothermal fluid of granitic magma. For themineralization, the temperature is 450°-350℃, the pressure, 450-1000×10~5 Pa, and the age, Himalayan(21.5 Ma). According to the geochemical characteristics, a minerogenic model is established: the deposit is ahypothermal cassiterite-quartz vein type tin deposit controlled by the hidden Himalayan granites.

关键词： The Geochemical Characteristics and Minerogenic Model for the Amo Hypothermal Tin Deposit in Ximeng County Yunnan Province

On the Genesis of Uranium Deposit 720 with Special Reference to the Double Solution-Mixing Model

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Chinese Journal Of Geochemistry 1991年第1期10卷 1-10页

作者：李振球胡中林 geological party 301 Bureau of Geological ExplorationSouth-Central China

Presented in this paper is an approach to the analysis of 'series-stage'*** processes of hydrothermal evolution involved in ore deposition,the factors affecting the enrichment of uranium and the source of ore forming elements in uranium deposit 720 are also discussed .In addition,the ore-forming tem-perature and pressure as well as the pH,Eh and chemical composition of ore-forming medium are studied with reference to the fluid inclusion data available.A double solution-mixing model has been proposed to explain the genesis of the uranium deposit studied.

关键词：铀矿床成因 PH值成矿物质流体包裹体成矿作用

Zircon U-Pb Age of the Shangxu Gold Deposit from Bangong-Nujiang Co, Northern Tibet, and Restriction on the Early Cretaceous Orogenic Gold Mineralisation

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Acta Geologica Sinica(English Edition) 2018年第4期92卷 1664-1666页

作者： HUANG Hanxiao LI Guangming LIU Hong CAO Huawen ZHANG Zhilin Chengdu Center China Geological Survey Chengdu 610081 China No.5 geological party of Tibet geological Exploration Bureau Golmud 816000 Qinghai China

Objective The Tibetan Plateau is the largest continent-to-continent collision belt in the world. Two orogenic gold mineralisation belts have been recognized in this collision belt, which are as follows： the Indus-Yarlung Zangbo suture zone orogenic gold belt （IYOG）, represented by the Mayoumu and Bangbu gold deposits, and the Ailaoshan orogenic gold belt （AOG）, whose typical cases include the Zhenyuan and Chang＇an gold deposits. The IYOG formed during 54-45 Ma corresponds to the compressional deformation during the early stages of the collision of the plates of India and Eurasia, whereas the AOG formed in 38-29 Ma corresponds to that during the later stage of the collision. Recently, several medium- to large-sized gold deposits （e.g., the Dacha and Shangxu deposits） have been discovered along the Bangong Co-Nujiang suture belt, which indicates that another orogenic gold mineralisation belt existed within the Tibetan Plateau. However, the lack of a mineral suitable for dating or for altering the minerals that were affected by various tectonic thermal events causes difficulty to perform accurate dating. This study is based on the Shangxu gold deposit and analyses the genesis of zircon in gold-bearing quartz veins as well as the accurate gold-forming age by hydrothermal zircon micro probe analysis using the U-Pb （LA-ICP-MS） method.

关键词： ICP MS Pb

Evaluation on Water Burst(inrush) Risks on 15~# Coal Seam Roof of Shigejie Coal Mine of Shaanxi Lu’’an Group

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Journal of Groundwater Science and Engineering 2014年第2期2卷 40-46页

作者： CHEN Feng LI Lian-juan ZHANG Hao LI Yan Hydrogeological Engineering Geological and Environmental Geological Exploration Institute China National Administration of Coal Geology no.11 geological party Hebei Exploration Burau of Geology and Mineral Resources

Based on the analysis of the hydrogeological conditions and water burst(inrush)conditions on 15~# coal seam roof of Shigejie coal mine of Shaanxi Lu’an Group, this article evaluated the water burst(inrush) risks on 15~# coal seam roof of Shigejie coal mine with the multi-source information composite technology and marked out the zones with medium and small water burst(inrush) risks on 15~# coal seam roof of Shigejie coal mine. The targeted water prevention and control measures were proposed in accordance with the results of research evaluation.

关键词： Coal seam roof Water burst (inrush) risk Evaluation

Mineralization and Ore-controlling Implications of Low-angle Faults

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Acta Geologica Sinica(English Edition) 1999年第4期73卷 438-446页

作者： CHEN Bailin LIU Jianmin ZHANG Da WU Jianshe Institute of Geomechanics CAGS Beijing 100081 West Fujian geological party of FBEDGMR Sanming

Abstract Low-angle faults include those occurring in thrust-nappe structures in a compressive setting and the detachment of metamorphic core complexes in an extensional setting. All low-angle faults have their own particularities. The low-angle fault plays an important role in controlling over some endogenetic metallic ore deposits. Based on studies of the Xiaoban gold deposit, Xinzhou gold deposit, and Longfengchang polymetallic ore deposit, and comparisons with other mines, the authors conclude the ore-controlling implications of low-angle faults as follows. (1) Because of high temperature and high pressure, as well as strong ductile deformation, the internal energy of the elements rises in the large-scale deep ductile low-angle faults, which causes the elements to activate and differentiate from the source rocks, forming ore-bearing hydrothermal solution, and bring mineralization to happen. (2) When rising from depths and flowing along the low-angle faults, the ore-bearing hydrothermal solution will alter and replace the tectonites in the fault zone. The rocks of the hanging side and the heading side differ in lithology, texture and structure, which results in changes or dissimilarities of the physical-chemical conditions. This destroys the balance of the hydrothermal solution system and causes the dissolved ore-forming elements to precipitate; as a result, a deposit is formed. Therefore, the meso-shallow ductile-brittle low-angle faults play the role of a geochemical interface in the process of mineralization. (3) Low-angle faults are often one of the important host structures.

关键词： low-angle fault ore-controlling structure structural metallogenesis geochemical interface of mineralization host structure

The Early Precambrian Rocks,Their Ages,Division and Correlation of the Taihang-Wutai Region, the Yanshan Region and the Eastern Sector of the Yinshan Mountains

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Acta Geologica Sinica(English Edition) 1988年第3期1卷 249-266页

作者： Wang Qichao Hebei Regional geological Surveying party, Langfang, Hebei Hebei Regional geological Surveying party Langfang Hebei

According to differences of the protolith formations, the early Precambrian strata in the northern part ofthe North China platform may be divided into the stable stratigraphic region in the west and the mobilestratigraphic region in the east. Based on unconformities, either stratiragphic or tectonic, as well as significantmetamorphic thermal events, the two regions may be stratigraphically defined as follows: 1) the middleArchaean Fuping Supergroup composed of the Chenzhuang and Wanzi Groups (stable areas), and the middleArchaean Qianxi Group (mobile area), whose upper limits are all dated at 2800 Ma; and 2) the upper ArchaeanWutai Supergroup composed of the Longquanguan, Shizui and Taihuai Groups (stable areas), and the upperArchaean Zunhua, Dantazi and Zhuzhangzi Groups (mobile areas). whose upper limits are all dated at 2500Ma. A correlation of the above-mentioned units is also made. The lower Proterozoic Hutuo Group of the sta-ble region is adjusted to comprise the Gaofan, Doucun, Dongye and Guojiazhai Groups. The upper limit of theGaofan Group is placed at 2350 Ma, Dongye 1850 Ma and Guojiazhai (the lower limit of the Changcheng Sys-tem) 1700 Ma.

关键词： meta the Yanshan Region and the Eastern Sector of the Yinshan Mountains The Early Precambrian Rocks,Their Ages,Division and Correlation of the Taihang-Wutai Region

The Tashisayi nephrite deposit from South Altyn Tagh, Xinjiang,northwest China

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Geoscience Frontiers 2019年第4期10卷 1597-1612页

作者： Kong Gao Guanghai Shi Meili Wang Gen Xie Jian Wang Xiaochong Zhang Ting Fang Weiyan Lei Yan Liu State Key Laboratory of geological Processes and Mineral Resources China University of Geosciences (Beijing)Beijing 100083China no.11 Gold geological party of the CAPF Lasa 850000China School of Earth and Ocean Sciences Cardiff UniversityCardiffCF10 3ATUK School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Resources and Materials Northeastern University at Qinhuangdao BranchQinhuangdao 066004China Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China

The Tashisayi nephrite deposit is located in South Altyn *** Qiemo County,Xinjiang Province,northwest *** is a recent discovery in the vast,well-known Kunlun-Altyn nephrite belt distributed along the south of the Tarim Basin,producing more than half of the nephrite from the whole belt in *** investigations revealed that it is a dolomitic marble-related(D-type)nephrite deposit,but little is known about its age of formation and relationships between the granites and *** we report field investigations,petrography of the neph rite,as well as petrography,geochemistry,geochronology of the zoisite-quartz altered intrusive rock and adjacent *** A-type granite is identified with a SHRIMP U-Pb zircon age of 926±7 Ma,suggesting it was emplaced in an extensional tectonic environment at that *** altered intrusive rock has a cluster of U-Pb zircon age of 433±10 *** similar trace element features to the A-type granite,suggesting it was formed in an extensional regime at this later *** formed because of the metasomatism of dolomite marble by hydrothermal *** is inferred that Ca^2+was released from the dolomitic marble by metasomatism forming Ca-rich fluids,which caused alteration of both the intrusive rocks(6.00-8.22 wt.%CaO)and granite(1.76-3.68 wt.%CaO)near the nephrite ore *** is also inferred that Fe^2+from the granite migrated towards the dolomite *** fluids gave rise to the formation of *** as zoisite,in the nephrite and altered intrusive rock,and epidote in the *** on the contact *** in hydrothermal processes,and consumption of Ca^2+,the Tashisayi nephrite is considered to have formed at the same time as the alteration of the intrusive rocks,i.e.~433 *** geochronological similarity(~926 Ma.433 Ma)of South Altyn and North Qaidam may suggest that tectonically they belong to one single complex in the past,which was offset by the Altyn Tagh fault(ATF).The similar

关键词： Nephrite Dolomite marble A-type granite Altyn Tagh fault Zircon U-Pb dating

New Discovery of Shizhushan Superlarge Wollastonite Deposit in Xinyu City, Jiangxi Province

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Acta Geologica Sinica(English Edition) 2018年第1期92卷 1670-1671页

作者： HU Zhenghua WANG Xlanguang CHEN Guohua LI Yanhong ZHAN Tlanwe CHEN Sibao LIU Shaohua CHEN Xuguang geological Survey of Jiangxi Province Nanchang 330000 China Administration of geological Prospecting Fund of Jiangxi Province Nanchang 330030 China China University of Geosciences Beijing 100083 China geological party Coal Geological Bureau of Jiangxi Province Xinyu 336600 Jiangxi China

Objective The Mengshan area of the Xinyu City, Jiangxi Province is an important wollastonite production base in China. As early as the 90s of the 20th century, more than ten medium to small-sized wollastonite deposits, such as the Yueguangshan and Caofangmiao Deposits were discovered in the outer contact zone of the Mengshan rock mass. After that, no more progress was achieved in wollastonite prospection. In 2016, the project funded by the geological Prospecting Fund of Jiangxi Province made significant breakthroughs in the ＂General Survey of the Shizhushan Wollastonite Ore in the Yushui District and Zhangmuqiao Wollastonite Ore in Shanggao County, Xinyu City, Jiangxi Province＂ in the Mengshan area. The new discovered Shizhushan Wollastonite Deposit has a scale of 50 million tons and its resources scale far exceeds that of the Seeleys Bay Wollastonite Deposit discovered in Canada.

关键词： New Discovery of Shizhushan Superlarge Wollastonite Deposit in Xinyu City Jiangxi Province

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Sedimentary Features of Shallow Ancient River Channels on the Northern Shelf of the South China Sea

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Acta Geologica Sinica(English Edition) 1995年第1期69卷 85-98页

作者： Kou Yangqi and Du Deli 2nd Marine geological Investigation party, MGMR, Guangzhou, Guangdong Jiang M inxi 2nd Marine geological Investigation party MGMR Guangzhou Guangdong

Quaternary buried ancient river channels are widespread in the shallow-level sediments of the northern shelf of the South China Sea. The sedimentary sequence mainly of fluvial deposits comprise an important component part of the low-stand system tract and transgressive system tract in the study region. The plannar variation and spatial association of the sedimentary features such as incised valley fillings, deltaic foreset wedges and block slides of shelf-marginal fans reflect the palaeogeographic environment during the fall of the regional sea level in the northern part of the South China Sea. Based on the high-resolution seismic reflection data and gelogical data from boreholes, the present paper makes an integrated interpretation of the Quaternary ancient river channels in the shallow sediments of the study area, studies the sedimentary features of the ancient channels such as their spatial distribution, seismic facies reflection indicators, sedimentary facies and sand -body types, and discusses their formational setting and evolutionary model, with the main purpose to render a service to the hydrocarbon resources exploration and development and marine engineering in the northern shelf of the South China Sea.

关键词： Northern part of the South China Sea continental shelf shallow-buried ancient channels low-stand system tract sea level change