第39卷 第2期 2006年 (3)
2007-04-12 17:40:30 作者： admin 来源： 浏览次数： 395 文字大小：【 大】【 中】【 小】
Metallogenetic Characteristics and Prospecting Potential
Of Major Metallic Minerals in Northwest China
LI Wen-yuan, DONG Fu-chen, JIANG Han-bing,?
TAN Wen-juan, WANG Yong-he?
(Xi′an Institute of Geology and mineral Resources,Xi′an 710054，China)?
Abstract：Northwest China has abundant mineral resources with 309 large, medium-size metallic ore deposits found. As centered by the Tarim block, the region connects with the Alashan massif situated on the northwestern margin of the North China craton to its east, while to the north and south, there are the Phanerozoic orogenic systems consisting of numerous microblocks. The orogenic system to north is represented by the Hercynian Tianshan-Hinggan orogen that connects the Caledonian Altay Ergun orogen with sandwich of the Junggar and lli massifs in be t ween. The southern orogenic system is composed of the central and western Qinling-Qilian-Kunlun and Songpan-Ganzi orogens from north to south, with the middle Qilian and Qaidam massifs. The region belongs to a complex intracontinental orogenic belt. As a whole, northwest China is surrounded by the Paleo-Asian orogenic -belt, the Tethyan orogenic belt and by the circum pacific orogenic zone to its n orth, south and east, respectively. The Proterozoic and Palaeozoic are two main metallogenic periods in the region. The main metallogenic types are magma liquation Cu and Ni deposits, massive sulp hide Cu and polymetallic deposits, sea floor exhalation Pb and Zn deposits, porp hyry Cu and Mo deposits, skarn W deposits and hydrothermal alteration metallic d eposits. According to regional geology and metallogenic evolution, we divided the metallogenic unit in northwest China into 3 ore forming domains, from north to south, they are: the Paleo-Asian metallogenic domain, the Qinling-Qilian-Kunlun metallogenic domain and Tethyan metallogenicdomain. The Paleo-Asian metallogenic domain is made up of Altay, west-southwest Tianshan, east Tianshan and Beishan metallogenic belts with the Junggar and Tarim basins, characterized by late Pa leozoic endogenic mineralization. The Qinling-Qilian-Kunlun metallogenic domain contains west Kunlun-Altyn Tagh, Qilian, east Kunlun and Qinling metallogenic belts having the Qaidam basin inside, featured by Proterozoic and early Paleozoic mineralization. The Tethyan metallogenic domain consists mainly of north Sanjian g metallogenic belt located in southeast Qinghai-Tibet plateau, with middle Cenozoic being the major metallogenic period. Existing evidence and new development of the mineral resource investigation indicate that northwest China possesses fa vorable metallogenic conditions and a great potential for further prospecting work. We have to restudy the geological and metallogenic background and focus on key exploration work over 10 potential large and super large size metallic ore forming areas in order to have great breakthroughs in prospecting.?
Key words： metallic ore deposit; metallogenic type; metallogenic belt; prospectin g potential
Major Ore Deposits in Altay Metallogenic Zone and Propecting Areas
TENG Jia-xin1, WANG Qing-ming2?
(1.Xi′an Institute of Geology and Mineral Resources, Xi′an 710054, China; ?
2.Geological Survey of Xinjiang, Urumqi 83000, China)
?
Abstract：The Altay metallogenic zone is one of the most important nonferrous and precious
metals mineralization zones in China.The regional metallogenic background and conditions
indicate an excellent potential of minerals in the zone. To date the following ore deposits have been found. They are mica, lithium beryllium tantalum and gem bearing peg matite, marine volcanic massive sulfide, magmatic copper nickel, metasedimentary iron, gold bearing low grade
metamorphosed carbon clastic rocks and gold bearing ductile shear zone. A grea t progress has been made in recent exploration of porphyry copper. By means of comparative study of metallogenic conditions with those in Kazakhstan and Mongolia, the favorable tar get areas for further exploration have been determined on the basis of theoretical reserve estimate on geochemical block in the Altay metallogenic zone.? ?
Key words：Altay metallogenic zone, major type; typical ore deposit; mineral potential; target area
New Discoveries and Prospecting Potential in Western?Southwestern Tianshan Metallogenic
ZHAO Ren-fu1, CHENG Xiao-hong1,WANG Qing-ming2,?
LIU Tuo2, BAI Hong-hai3, YUAN Yong-jiang4,?
YAO Wen-guang1, LI Chang-an1?
(1.Xi′an Insititue of Geology and Mineral Resources,Xia′n,710054; 2.Xinjiang Geological Survey, Urumqi,830000; 3.The Second Geology Team of Xinjiang Bureau of Geology and Minerals Exploration and Development,Kashi,84400 2; 4.The Eighth Geology Team of Xinjiang Bureau of Geology and Minerals Explorati on and Development,Aksu,843000)?
Abstract： This paper presents key metallogenic areas, target prospecting areas and their characteristics in the western and southwestern Tianshan, Xinjiang, based on reg ional geological
background, ore forming conditions, geochemistry and ore deposit geology .Also , the mineral
potential in the area has been evaluated for future exploration? ?
Key words：western southwestern Tianshan; metallogenic background; potential asse ssment; prospecting target area
Prospecting of Porphyry Copper and Other Types of Ore ?Deposit in the Eastern Tianshan Metallogenic Zone
WANG Qing-ming1, ZHAO Ren-fu2, QU Xun1,?
CHENG Xiao-hong2, YUAN Yong-jiang3?
(1. Xinjiang Province Geological Survey,Wulumuqi 830000，China; 2.Xi′an
(2. Insititue of Geology and Mineral Resoursouces,Xi′an 710054,China;3.The
Eighth Geology Team of Xinjiang?Bureau of Geology and Minerals Exploration and Development,Akesu 843000,China)?
Abstract：As one of the most important minralization zones for nonferrous, ferro us and precious
metals in China, the eatern Tianshan orogen straddles between the Kazakstan and the Tarim plates.The orogen has experienced formation of the PreSinian basement, evolution of the paleo Asian ocean during Sinian Devonian, post collision orogeny during Carboniferous early Permian and intracontinental orogeny from late Permian to now. The major ore forming period is late Paleozoic and mineralization has been complicated.The major ore deposits in the eastern Tianshan are: porphyry copper and volcanic Cu, Mo and Au formed in an island arc setting dist ributed in the northern part of the eastern Tianshan; volcanic and skarn Au, Cu, Ni and Ag in a rifting environment occurring in the central part; strata bound and hydrothermal Pb, Zn and Ag deposit in the central southern part and Cu, Ni and Au deposits in an extentional setting in the southern Kuruktag and Beishan.It is suggested that the eastern Tianshan has great poten t ial for Cu, Ni and Mo deposits and 28 areas have been selected as target for fur ther exploration.? ?
Key words：eastern Tianshan; metallogenic background; ma jor ore deposit; typical ore deposit;
potential assessment; target prospecting area
Main Metallogenic Characteristics in the Beishan Orogen
YANG He-qun1，LI Ying1，YANG Jian-guo1，LI Wen-ming1，YANG Lin-hai1，ZHAO Guo-bin１，YE De-jin２，ZHAO Yan-qing２，ZHAO Jian-guo２，SHEN Cun-li３，WANG Xin-liang３，SU Xin-xu３?
（1.Xi′an Institute of Geology and Mineral Resources，Xi′an 710054， China；?
2.Geological Suruey of Gansu Province，Lanzhou 730050，China；?
3.Geological Suruey of Nei Mongol，Huhehaote 010010，China ） ?
Abstract：The Beishan orogen located along the northern margin of the Talimu mas sif belongs to the western central portion of the Tianshan-Xing′an orogen of the Paleo Asia tectonic domain.The crustal components in the region include: late Archean crystallization basement, middle late Proterozoic fold series and Paleozoic cover of upper Sinian to Permian stratigraphic system Structure is characterized by fault blocks are divided by a series of arc form faults in a east west stretch.In side he blocks, there are intensive folds and active magmatism Granites can be classified to I and S type, and mafic and ultramafic rocks are Fe-rich and Mg -rich kinds.Volcanics possess continental rift feature.A number of ophiolite zones have be en found in the area.All these indicate an excellent metallogenic setting.Seven types of ore deposit have been reposted in the area: ①intermediate acid intrusion related hydrothermal ore deposit; ② volcanic hydrothermal ore deposit; ③meta sedimentary ore deposit; ④sedimentary ore d eposit; ⑤ exhalative sedimentary reworked deposit; ⑥basic and ultrabasic magma related ore deposit; ⑦ hydrothermal reworked ore deposit.Ten target prospecting areas have been pinp ointed according
to detailed geological work.? ?
Key words：Beishan orogen; metallogenic characteristics; prospecting target
Metallogenic Characteristics and Prospecting Target ?
in the Qilian Metallogenic Zone
JIA Qun-zi,YANG Zhong-tang, XIAO Chao-yang,QUAN Shou-cun,?ZOU Xiang-hua,LI Bao-qiang?
( Xi′an Institute of Geology and Mineral Resources, Xi′an 710054,China)?
Abstract： On the basis of a synthetic analysis of ore forming conditions and regional mineralization characteristics in the Qilian metallogenic zone, it is proposed t hat marine volcanic,
contact metasomatic (skarn), meta sedimentary (including sedimentary exhalative ) and ductile shear zone types are the major target ore deposits in the zone. By means of stu dy on geology and
ore deposits as well as geophysical, geochemical exploration and remote sensing, 69 prospecting
areas have been located. Among them, 5 areas are grade A, 23 areas grade B and 4 1 grade C, and
16 copper, lead, zinc, gold and tungsten target areas for mineral resource asses sment have been
selected.
Key words：metallogenic background; metallogenic characteristics; prospecting area; Qilian metallogenic zone
Study on Metallogenic Characteristics and Traget Areas in the Altyn Tagh Metallogenic Zone
MAO De-bao1, ZHONG Chang-ting1, NIU Guang-hua1,WANG Jie1, WANG Ke-zhuo2, WANG Hong-jun2, LI Zhi-ming3?
(1. Tianjin Institute Geology and Mineral Resources, Tianjin, 300170,China; 2.Xin jiang Institute of Geological Survey, Urumuqi, 830011,China; 3. Xi′an Institute Geolo gy and? Mineral Resources, Xi′an，710054,China)
?
Abstract：Situated between the Tarim and Qaidam basins, the Altyn Tagh metallogenic belt
stretches 600 km in NE-SW direction. The belt is mainly composed of Archean Pa leozoic metamorphic rocks and sedimentary rocks filling in the Mesozoic Cenozoic fault bound basins in the belt. The area has undergone multi-phased tectonic events including deforma tion, magmatism, tectonic uplift and strike slip movement. Metallic, nonmetallic and energy resource deposits have been developed in the belt and Au, Cu, Pb and Zn ore deposits have shown a great potential. The metallic deposits can be divided into 9 types that are represented by Au deposit s in the Caishigou, Dapinggou and Xiangyun areas, and Cu deposits in the Lapeiquan, Suolake and Kala dawan areas. Based on the regional survey, geochemical and geophysical exploration, remote se nsing and studies of mineralization and factors controlling the ore forming as well as th e use of GIS method, 5 metallogenic zones, 10 promising areas and 25 target areas have been determine d in the belt. ?
Key words：Altyn Tagh metallogenic belt; metallogenic prognosis; prospecting direction;
prospecting area; prospecting target
Metallogenic Characteristics and Prospecting Areas in the Western Kunlun Metallogenic Belt
LI Bao-qiang1，2，YANG Wan-zhi3，ZHAO Shu-ming3，?
YANG Jian-guo2，ZHENG Qi-ping3?
(1.China University of Geosciences,Wuhan 430074,China；2..Xi′an Institute of ?
Geological and Mineral Resources, China Geological Survey, Xi′an 710054, China；?3.Xinjiang Institute of Geological Survey， Urumqi 830000,China)
?
Abstract： The western Kunlun mountains, in an area of 18,000 km2, are located on the southwestern margin of the Tarim massif in NW China. The unfavorable working con ditions have
resulted in a backward geological study. With the implementation of national sur vey projects for
land and resources in recent years, a series of regional surveys have been condu cted and more and
more ore deposits have been reported, from which, a great metallogenic potential has emerged. This paper, based on synthetic analyses of geological settings and metallogenic characteristics as
well as elemental geochemistry, discusses prospecting potential and suggests 8 t arget areas for exploration in the near future.
Key words： western Kunlun mountains; typical ore deposit; prospecting finding; potential
assessment; target selection ??
Typic Deposit Analysis in the Eastern Kunlun
Area, NW China
DANG Xing-yan1，FAN Gui-zhong1, LI Zhi-ming2，?
FAN Xiao-hua3,GU Ying1?
(1.Qinghai Geological Survey, Xining 810012, China；2.Xi′an Institute of Geol ogy and Mineral Resources, CAGS, Xi′an 710054, China；3.Golmud Bureau of Land and ?
Mineral Resources, Golmud 810600, China)?
Abstract： On the basis of comprehensive analyses on geological setting and miner alization
conditions in the eastern Kunlun metallogenic belt, this study systematically discusses metallogenic characteristics, mineralization processes and prospecting potential for skarn iron and polymetallic deposit, hydrothermal superimposed Sedex type Co Au deposit, mass ive sulfide
Cu Co deposit and orogenic Au deposit with the examples of Kendekeke, Tuolugou , Dulenggou
and Dachang deposits, respectively. Eight metallogenic prospective regions and thirteen prospecting targets have been determined by a regional metallogenic model, spati al distribution of
different ore deposits and anomalies in the eastern Kunlun area. Also, an order of increasing metallogenic potential for mineralization zones in the area has been inferred as follows: central
Kunlun area, Northern Kunlun area, Aneymaqen northern Bayankala area, souther n Kunlun area. Key words： eastern Kunlun area; metallogenic characteristics; prospecting potential
Mineralization Characteristics and Prospecting ?
Potential in the Qinling Metallogenic Belt
YAO Shu-zhen1, 2, ZHOU Zong-gui2, LU Xin-biao1, 2, CHEN Shou-yu1,2, ?DING Zhen-ju2, WANG Ping2?
(1. State Key Laboratory of Geological Processes and Mineral Resources, China ?
University of Geosciences, Wuhan 430074,China；2. Faculty of Earth resources, China University of Geosciences, Wuhan 430074,China)
?
Abstract： The Qinling metallogenic belt is an important mining site for base and precious metals and also one of the most potential mineralization areas in China. The recent int egrated studies show that the Qinling Mountains is a collisional orogen with polycyclic evolutio n and composite formations as well as mineralization. The characteristics of tectonic setting, lithological formation, association of ore deposits and metallogenic epoch indicate seven major mineroge netic systems and 18 minerogenetic series governing mineralization of Co, Mo, Pb, Zn, Ag, Au, Hg and Sb in the belt. This paper discusses the geological features for each minerogenetic series and its corresponding ore deposit, reviews the new discoveries in recent exploration and establishes t he regional models for Cu, Au, Pb, Zn and Ag series. The study of the spectrum of ore deposits in t he belt demonstrates that the regional mineralization is temporally characterized by pol ycycling,
inheritance, neoformation and superimposition. The Variscan, late Indosinian to Yanshanian epochs are favorable periods to form large and giant ore deposits. Spatially, mi neralization zoning
in both vertical and lateral direction has been observed. Also, this study evalu ates the Qinling metallogenic belt in terms of ore forming potential and prospecting areas and c oncludes that prospective deposits are SEDEX and MVT types of Pb and Zn, vienlet disseminated type and
quartz vein altered type Au, porphyry type of Mo, W and Cu and epithermal Hg and Sb in the belt. Finally, 5 regional prospecting zones and 17 important potential areas have been determined.
Key words： Qinling metallogenic belt; minerogenetic system; minerogenetic series ; spectrum of ore deposits; ore forming model; metallogenic potential
?
Characteristics of Major ore Deposits in the Northwestern Segment of the Sanjiang
Metallogenic Belt,Southwest China
WANG Fu-chun1，WANG Yan1，LI Bao-qiang2，GUAN You-guo3
( 1.Qinghai Geological Survey, Xining 810012, China；2.Xi′an Institute of Geology and Mineral Resources, CAGS, Xi′an 710054, China；3.Qaidam Comprehensive Geological Exploration Team,Golmud 816000,Qinghai,China)
?
Abstract： The northwestern segment of Sanjiang region (Three rivers) is part of the well?known Sanjiang nonferrous and precious metal mineralization belt. Howe v er, the backward geological work in the past had seriously affected our knowledg e about the metallogenic setting and mineral potential in the segment. In recent years, as implementation of the assessment of mineral resources supported by Ch ina Bureau of Geological Survey, the situation has been largely changed. Combini ng with geology, geophysics, geochemistry and multi?factor analysis, this paper summarizes the metallogenic characteristics and ore prospecting potential in the northwestern segment of the Sanjiang metallogenic belt. Also, the paper discuss es geological setting and classifies metallogenic systems and types through intr oducing typical ore deposits and new advances in prospecting. On the basis of al l these, three ore-forming prospective areas and ten metallogenic prognosis area s have been determined, and prospecting potential of copper, lead zinc and silv er deposits have been evaluated as well.?
Key words：the northwestern segment of Sanjiang region，metallic ore deposits，me tallogenic characteristics，prospecting potential
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