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1.
西藏冈底斯东段构造演化及铜金多金属成矿潜力分析 总被引：54，自引：6，他引：54
地质、物探、化探、遥感的综合研究表明，西藏冈底斯东段蕴含着巨大的找矿潜力，矿化类型齐全，以斑岩型及喷流型为主。与构造演化相关形成四大成矿系列：与新特提斯洋壳俯冲作用（125－96Ma）有关的岩浆型（Cr，Pt，Cu，Ni）矿床系列及喷流型（Cu，Pb，Zn，Ag）矿床系列；与弧－陆碰撞造山作用（85－50Ma）有关的浅成低温热液型（Au，Ag，Pb，Zn，Sb）、构造蚀变岩型（Au）及矽卡岩型（Cu）矿床系列；与造山期后伸展走滑作用（22－12Ma）有关的斑岩型（Cu，Mo）、隐爆角砾岩型（Cu，Au，Pb，Zn）、剪切带型（Au，Ag，Sb）及矽卡岩型（Cu，Fe）矿床系列。由俯冲杂岩带向北，具有由结晶分异型（熔离型）－剪切带型（蚀变岩型）－矽卡岩型、浅成低温热液型－斑岩型－斑岩型十喷流型－喷流型－热液充填交代型的分带趋势，成矿总体显示出同源多位、同位多期、深源浅成、多因复成的特点。 相似文献
2.
枪口南银多金属矿床地处东昆仑多金属成矿带东段,枪口—哈龙休玛海西-燕山期铁、银、铅、锌、铜、金、钼成矿亚带部分,成矿地质条件优越。枪口南银多金属矿区目前已圈定9条矿化带,21个矿体,主要矿种有金、银、铜、铅、锌、钼等,矿石类型主要为构造热液(脉)型铜铅锌银矿石、构造蚀变岩型金矿石。枪口南矿区构造-岩浆活动强烈,印支期—燕山期构造岩浆活动为矿区成矿提供了热源、成矿物质,区内NE向断裂控制区内金、铜、铅锌等矿体的产出,NW向断裂组控制着区内金、银矿(化)体。NW向断裂组,是区内重要控矿构造;区内中部发现的Ⅳ号含矿斑岩体,具有斑岩型矿床蚀变特征,显示其具有斑岩成矿条件。枪口南银多金属矿床成因有构造热液(脉)型、构造蚀变岩型和斑岩型。 相似文献
3.
《International Geology Review》2012,54(9):1031-1051
The geotectonic units of Zhejiang Province include the Yangtze Plate in the northwest juxtaposed against the South China fold system in the southeast along the Jiangshan–Shaoxing fault. The South China fold system is further divided into the Chencai–Suichang uplift belt and the Wenzhou–Linhai geotectogene belt, whose boundary is the Yuyao–Lishui fault. The corresponding metallogenic belts are the Mo–Au(–Pb–Zn–Cu) metallogenic belt in northwest Zhejiang, the Chencai–Suichang Au–Ag–Pb–Zn–Mo metallogenic belt, and the coastal Ag–Pb–Zn–Mo–Au metallogenic belt. The main Mesozoic metal ore deposits include epithermal Au–Ag(Ag), hydrothermal vein-type Ag–Pb–Zn(Cu), and porphyry–skarn-type Mo and vein-type Mo deposits. These ore bodies are related to the Mesozoic volcanic-intrusive structure: the epithermal Au–Ag(Ag) deposits are represented by the Zhilingtou Au–Ag deposit and Houan Ag deposit and their veins are controlled by volcanic structure; the hydrothermal vein-type Ag–Pb–Zn deposits are represented by the Dalingkou Ag–Pb–Zn deposit and also controlled by volcanic structure; and the porphyry–skarn-type Mo deposits are represented by the Tongcun Mo deposit and the vein-type Mo deposits are represented by the Shipingchuan Mo deposit, all of which are related to granite porphyries. These metal ore deposits have close spatio-temporal relationships with each other; both the epithermal Au–Ag(Ag) deposits and the hydrothermal vein-type Ag–Pb–Zn deposits exhibit vertical zonations of the metallic elements and form a Mo–Pb–Zn–Au–Ag metallogenetic system. These Jurassic–Cretaceous deposits may be products of tectonic-volcanic-intrusive magmatic activities during the westward subduction of the Pacific Plate. Favourable metallogenetic conditions and breakthroughs in the recent prospecting show that there is great resource potential for porphyry-type deposits (Mo, Cu) in Zhejiang Province. 相似文献
4.
卡尔却卡地区是青海省重要的铁、铜、铅、锌、金多金属矿集区,具有特征明显的构造-岩浆岩带。在分析区内地层、构造、岩浆岩及接触带等控矿因素与成矿的关系的基础上,建立了找矿标志;根据区内的成矿特征,初步认为卡尔却卡多金属矿床为斑岩型矿床成矿系列,有斑岩型、夕卡岩型和蚀变岩型3种成因类型,形成斑岩-夕卡岩-热液成矿系统,成矿作用均与中-晚三叠世底侵事件有关。 相似文献
5.
秦岭成矿带成矿特征和找矿方向 总被引：15，自引：10，他引：15
秦岭成矿带是我国有色、贵金属工业的重要矿产资源基地,也是最具成矿潜力和找矿远景的地区之一。近年的综合研究工作表明,秦岭造山带是一个多旋回复合大陆碰撞造山带,自太古代以来经历了多种构造体制的转化和多期构造热事件发生,伴随有多个构造成矿旋回,所形成的含矿建造、成矿作用及矿床组合具有多样性。根据成矿时代、构造、建造、成矿作用及矿床组合特征分析,认为秦岭造山带铜、钼、铅、锌、银、金、汞、锑等内生金属矿床主要受7个主要的成矿系统控制,形成了18个主要成矿系列,并对各成矿系列及其典型矿床的地质特征和近几年找矿新发现进行了系统的论述,建立了铜、金、铅、锌、银等矿床系列的区域成矿模式。对区域优势矿种的成矿谱系研究表明,本区成矿在时间演化上表现出明显多旋回性、继承性、新生性和叠加性特征,华力西期与印支末-燕山期是成矿大爆发期,最有利于大型超大矿床形成;在空间分布上,具有明显的侧向和垂向分带性。在此基础上,对秦岭成矿带的成矿潜力及成矿远景区进行了评价和划分,指出秦岭地区热水喷流沉积型与密西西比型铅锌银矿床、微细浸染型与石英脉构造蚀变岩型金矿床、斑岩型钼钨铜矿床及低温热液型汞锑矿床等具有很大的找矿前景。并划分出5个区域成矿远景带和17个重要成矿预测区。 相似文献
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得尔布干成矿区(北片)矿产资源远景评估 总被引：3，自引：0，他引：3
得尔布干成矿区的黑山头以北地区（简称为"北片"）由6个成矿带组成,即上黑龙江成矿亚区（Ⅰ）的恩和哈达-二根河金成矿带（Ⅰ-1）、龙根河-二十一站铜金成矿带（Ⅰ-2）、奥拉奇-瓦拉干金成矿带（Ⅰ-3）和额尔古纳成矿亚区（Ⅱ）的乌玛-八道卡金（铜）成矿带（Ⅱ-1）、吉拉林-富克山铜金成矿带（Ⅱ-2）、下护林-西吉诺铅锌银金（铜）成矿带（Ⅱ-3）.为了评估该区金属矿产资源潜力,为今后勘查工程提供科学依据和新的找矿思路,论述了各成矿带成矿地质条件、控矿因素、成矿类型. 相似文献
8.
Qingdong Zeng Yongbin Wang Song Zhang Jianming Liu Kezhang Qin Jinhui Yang Weidong Sun Wenjun Qu 《Resource Geology》2013,63(1):99-109
Mesozoic ore deposits in Zhejiang Province, Southeast China, are divided into the northwestern and southeastern Zhejiang metallogenic belts along the Jiangshan–Shaoxing Fault. The metal ore deposits found in these belts are epithermal Au–Ag deposits, hydrothermal‐vein Ag–Pb–Zn deposits, porphyry–skarn Mo (Fe) deposits, and vein‐type Mo deposits. There is a close spatial–temporal relationship between the Mesozoic ore deposits and Mesozoic volcanic–intrusive complexes. Zircon U–Pb dating of the ore‐related intrusive rocks and molybdenite Re–Os dating from two typical deposits (Tongcun Mo deposit and Zhilingtou Au–Ag deposit) in the two metallogenic belts show the early and late Yanshanian ages for mineralization. SIMS U–Pb data of zircons from the Tongcun Mo deposit and Zhilingtou Au–Ag deposit indicate that the host granitoids crystallized at 169.7 ± 9.7 Ma (2σ) and 113.6 ± 1 Ma (2σ), respectively. Re–Os analysis of six molybdenite samples from the Tongcun Mo deposit yields an isochron age of 163.9 ± 1.9 Ma (2σ). Re–Os analyses of five molybdenite samples from the porphyry Mo orebodies of the Zhilingtou Au‐Ag deposit yield an isochron age of 110.1 ± 1.8 Ma (2σ). Our results suggest that the metal mineralization in the Zhejiang Province, southeast China formed during at least two stages, i.e., Middle Jurassic and Early Cretaceous, coeval with the granitic magmatism. 相似文献
9.
西南三江锌铅银铜锑金成矿带成矿特征及资源潜力 总被引：1，自引：0，他引：1
西南三江成矿带是我国重要有色金属和贵金属多金属成矿带之一,锌铅银铜锑金等多金属矿产资源十分丰富。本文从西南三江成矿带范围、成矿地质条件、主攻矿种、矿床类型和矿产资源潜力等方面概述了西南三江成矿带的成矿特征及资源潜力。西南三江成矿带地处特提斯—喜马拉雅构造域的东部,是欧亚板块与印度板块碰撞结合带,大地构造复杂,地层发育齐全,岩浆活动频繁,成矿地质条件优越。西南三江成矿带划分了与富碱性斑岩有关的金铜钼铅锌矿床成矿系列、与碳酸盐岩—碎屑岩系有关铅锌矿床成矿系列和与碰撞造山韧性剪切带有关的金镍铬矿床成矿系列等二十个矿床成矿系列,主攻矿种为锌、铅、铜、银、金和锑,发育有斑岩型、沉积-改造型和MVT型等多种矿床类型。兰坪金顶超大型铅锌矿床和鹤庆北衙超大型金矿床是西南三江成矿带多期多类型叠加成矿的典型矿床,本文简要介绍了其矿床地质特征。根据全国矿产资源潜力评价项目最新成果,本文按预测深度汇总了西南三江成矿带锌、铅和铜等20种矿产的预测资源量,划分了青海多彩地区铜多金属、西藏夏日多—多霞松多铜钼、云南兰坪—云龙铅锌铜和云南鹤庆—祥云金多金属等24个成矿远景区,初步总结了其中13个重点远景区的主攻矿种、主攻矿床类型和资源潜力。 相似文献
10.
《Resource Geology》2018,68(3):258-274
The Dabaoshan deposit in Northern Guangdong Province, South China, is a Cu–Mo–W–Pb–Zn polymetallic deposit, located in the southern part of the Qin–Hang porphyry–skarn Cu–Mo ore belt. The deposit mainly comprises porphyry Mo and stratiform skarn Cu ore deposits. The genesis of the Cu ore deposit has been ascribed to a typical skarn ore deposit formed by the metasomatism of Devonian carbonate rock layers or to a volcanic rock‐hosted massive sulfide deposit formed by marine exhalation. In this paper, we report on the homogenization temperatures and salinities of fluid inclusions and C, H, O, S, and Pb isotopic compositions of fluids and minerals in this deposit. Homogenization temperatures and salinities of fluid inclusions in garnet, diopside, quartz, and calcite provide information on the skarnification, mineralization, and postmineralization stages. The data show that ore‐forming fluids experienced a continuous transition from high temperatures and salinities to low temperatures and salinities over the entire period of mineralization. C, H, and O isotopic compositions indicate that ore‐forming fluids were derived mainly from magmatic water. O isotopic compositions indicate that ore‐forming fluids mingled with atmospheric water during the last stage of mineralization. Sulfur in the ore came mainly from deep magmatic sources. Pb isotopic compositions in the orebody show that almost all the lead in the ore was derived from magma with a crustal source. Combined geological, geophysical, and geochemical data were achieved before we proposed that the Dabaoshan porphyry–skarn Cu–Mo–W–Pb–Zn deposit, as one member of the Qin–Hang porphyry–skarn Cu–Mo ore belt, formed during the Jurassic subduction of the paleo‐Pacific plate beneath the Eurasian continent at quite low angle. NE‐ and EW‐trending structures controlled the emplacement of magmatic rocks in the South China region. In the mining area, the Xiangguanping Fault and its branches were the main conduits for magmatic crystallization and mineralization. The many subfaults, folds, and interlayer fracture zones on both sides of the main fault provided the requisite space for the ore and, together, were the controlling structures of the orebody. 相似文献
11.
浙江临安西天目地区地处早古生代扬子被动陆缘和晚中生代西太平洋活动陆缘构造叠加区域.该区发育碳酸盐岩建造,有大量的脉岩出露,环形、放射状断裂构造发育,具有面型蚀变及铜、铅、锌、金等多个矿（化）点;重磁等物探信息显示,该区深部发育EW向深断裂和隐伏岩体;化探扫面揭示,区内钨、钼、铋、铜、铅、锌、金、银、砷等元素背景高;自然重砂调查反映,白钨矿、铅族、钼族等重砂矿物组合具有异常显示.综合成矿地质条件及物、化、重砂异常等信息,认为该区具有寻找斑岩型、夕卡岩型、低温热液型钨、钼、铜、铅锌、金银等多位一体矿床的潜力. 相似文献
12.
Sedimentary, Magmatic and Tectonic Constraints on the Formation of the Yulong Supper-Large Porphyry Copper Polymetal Deposit, East Tibet 总被引：1，自引：0，他引：1
ＳＵＰＲＡ ＳＵＢＤＵＣSEDIMENTARY, MAGMATIC AND TECTONIC CONSTRAINTS ON THE FORMATION OF THE YULONG SUPPER0-LARGE PORPHYRY COPPER POLYMETAL DEPOSIT, EAST TIBET 相似文献
13.
罗卜岭矿床是与晚中生代花岗闪长斑岩体有关的隐伏斑岩型铜钼矿床, 矿区位于紫金山矿田的东北部; 铜钼矿体主要产于绿泥石化-绢英岩化和(弱)钾化-绢英岩化带中, 矿石矿物组合为黄铜矿+辉钼矿; 少量过渡类型矿体产于高级泥化带中, 矿石矿物组合为蓝辉铜矿+铜蓝+辉钼矿。罗卜岭矿区的原生晕地球化学三维模型显示, 微量元素具有一定的分带特征, 低温元素Au与高温元素组合W、Sn、Bi分布于矿体上方, 中低温元素Pb、Zn、Ag分布于Cu、Mo元素之间; 元素直观垂向分带序列大致为: (As、Sb、Hg)-(W、Bi、Sn)-Ga-Au、Ba-Cu、Ag-Pb、Zn-Mn-Mo; 前缘晕的元素与氧化物组合为As、Sb、Au、Ga、Al2O3, 矿体近矿晕元素组合为Ag、Pb、Zn, 缺失尾晕元素组合; Cu、Mo可直接作为找矿指示元素, Au、Ag、Pb、Zn、As、Sb、Ga、Ba、Mn可作为间接指示元素, 矿床深部K2O正异常与Al2O3负异常可作为斑岩型铜钼矿的重要找矿标志, 这一规律对紫金山矿田深部和外围隐伏斑岩型矿体的勘查工作具有重要的参考意义。 相似文献
14.
FU Zhongyang XU Xiaochun HE Jun FAN Ziliang XIE Qiaoqin DU Jianguo CHEN Fang 《《地质学报》英文版》2019,93(1):88-110
The Tongling ore district is one of the most economically important ore areas in the Middle–Lower Yangtze River Metallogenic Belt, eastern China. It contains hundreds of polymetallic copper–gold deposits and occurrences. Those deposits are mainly clustered(from west to east) within the Tongguanshan, Shizishan, Xinqiao, Fenghuangshan, and Shatanjiao orefields. Until recently, the majority of these deposits were thought to be skarn-or porphyry–skarn-type deposits; however there have been recent discoveries of numerous vein-type Au, Ag, and Pb-Zn deposits that do not fall into either of these categories. This indicates that there is some uncertainty over this classification. Here, we present the results of several systematic geological studies of representative deposits in the Tongling ore district. From investigation of the ore-controlling structures, lithology of the host rock, mineral assemblages, and the characteristics of the mineralization and alteration within these deposits, three genetic types of deposits(skarn-, porphyry-, and vein-type deposits) have been identified. The spatial and temporal relationships between the orebodies and Yanshanian intrusions combined with the sources of the ore-forming fluids and metals, as well as the geodynamic setting of this ore district, indicate that all three deposit types are genetically related each other and constitute a magmatic–hydrothermal system. This study outlines a model that relates the polymetallic copper–gold porphyry-, skarn-, and vein-type deposits within the Tongling ore district. This model provides a theoretical basis to guide exploration for deep-seated and concealed porphyry-type Cu(–Mo, –Au) deposits as well as shallow vein-type Au, Ag, and Pb–Zn deposits in this area and elsewhere. 相似文献
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Palladium, Platinum and Gold Concentrations in Fengshan Porphyry Cu–Mo Deposit, Hubei Province, China 总被引：1，自引：0，他引：1
Abstract: The Fengshan porphyry-skarn copper–molybdenum (Cu–Mo) deposit is located in the south-eastern Hubei Province in east China. Cu–Mo mineralization is hosted in the Fengshan granodiorite porphyry stock that intruded the Triassic Daye Formation carbonate rocks in the early Cretaceous (~140 Ma), as well as the contact zone between granodiorite porphyry stock and carbonate rocks, forming the porphyry-type and skarn-type association. The Fengshan granodiorite stock and the immediate country rocks are strongly fractured and intensely altered by hydrothermal fluids. In addition to intense skarn alteration, the prominent alteration types are potassic, phyllic, and propylitic, whereas argillation is less common. Mineralization occurs as veins, stock works, and disseminations, and the main ore minerals are chalcopyrite, pyrite, molybdenite, bornite, and magnetite. The contents of palladium, platinum and gold (Pd, Pt and Au) are determined in nine samples from fresh and mineralized granodiorite and different types of altered rocks. The results show that the Pd content is systematically higher than Pt, which is typical for porphyry ore deposits worldwide. The Pt content ranges from 0.037 to1.765 ppb, and the Pd content ranges between 0.165 and 17.979 ppb. Pd and Pt are more concentrated in porphyry mineralization than skarn mineralization, and have negative correlations with Au. The reconnaissance study presented here confirms the existence of Pd and Pt in the Fengshan porphyry-skarn Cu–Mo deposit. When compared with intracontinent and island arc geotectonic settings, the Pd, Pt, and Au contents in the Fengshan porphyry Cu–Mo deposit in the intracontinent is lower than the continental margin types and island are types. A combination of available data indicates that Pd and Pt were derived from oxidized alkaline magmas generated by the partial melting of an enriched mantle source. 相似文献
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Yang Song Hai‐Yang Ding Xiao‐Ming Qu Rui‐Jiang Wang Wei Zhou Shu‐Zhi Wang 《Resource Geology》2014,64(2):117-135
The Dawan Mo–Zn–Fe deposit located in the Northern Taihang Mountains in the middle of the North China Craton (NCC) contains large Mo‐dominant deposits. The mineralization of the Dawan Mo–Zn–Fe deposit is associated with the Mesozoic Wanganzhen granitoid complex and is mainly hosted within Archean metamorphic rocks and Proterozoic–Paleozoic dolomites. Rhyolite porphyry and quartz monzonite both occur in the ore field and potassic alteration, strong silicic–phyllic alteration, and propylitic alteration occur from the center of the rhyolite porphyry outward. The Mo mineralization is spacially related to silicic and potassic alteration. The Fe orebody is mainly found in serpentinized skarn in the external contact zone between the quartz monzonite and dolomite. Six samples of molybdenite were collected for Re–Os dating. Results show that the Re–Os model ages range from 136.2 Ma to 138.1 Ma with an isochron age of 138 ± 2 Ma (MSWD = 1.2). U–Pb zircon ages determined by laser ablation inductively coupled plasma mass spectrometry yield crystallization ages of 141.2 ± 0.7 (MSWD = 0.38) and 130.7 ± 0.6 Ma (MSWD = 0.73) for the rhyolite porphyry and quartz monzonite, respectively. The ore‐bearing rhyolite porphyry shows higher K2O/Na2O ratios, ranging from 58.0 to 68.7 (wt%), than those of quartz monzonite. All of the rock samples are classified in the shoshonitic series and characterized by enrichment in large ion lithophile elements; depletion in Mg, Fe, Ta, Ni, P, and Y; enrichment in light rare earth elements with high (La/Yb)n ratios. Geochronology results indicate that skarn‐type Fe mineralization associated with quartz monzonite (130.7 ± 0.6 Ma) formed eight million years later than Mo and Zn mineralization (138 ± 2 Ma) in the Dawan deposit. From Re concentrations in molybdenite and previously presented Pb and S isotope data, we conclude that the ore‐forming material of the deposit was derived from a crust‐mantle mixed source. The porphyry‐skarn type Cu–Mo–Zn mineralization around the Wanganzhen complex is related to the primary magmatic activity, and the skarn‐type Fe mineralization is formed at the late period magmatism. The Dawan Mo–Zn–Fe porphyry‐skarn ores are related to the magmatism that was associated with lithospheric thinning in the NCC. 相似文献
19.
《Russian Geology and Geophysics》2015,56(3):435-445
The spatial coexistence and synchronous formation of magmatogene porphyry Cu–Mo mineralization and epithermal gold mineralization are due to the genetic relationship between their formation processes. This relationship might be due to the generation of metal-bearing fluids of different geochemical compositions by the porphyry ore-magmatic system, which then participate in the formation of magmatogene porphyry Cu–Mo(Au) and associated epithermal gold deposits. Synthesis of fluid inclusions in quartz was performed for experimental study of the behavior of Cu, Mo, W, Sn, Au, As, Sb, Te, Ag, and Bi in heterophase fluids similar in composition and aggregate state to natural ore-forming fluids of porphyry Cu–Mo(Au) deposits. We have established that at 700 °C, a pressure decrease from 117 to 106 MPa leads to a significant enrichment of the gas phase of heterophase chloride fluid with Au, As, Sb, and Bi. The heterophase state of carbonate–chloride–sulfate fluids is observed at 600 °C and 100–90 MPa. It characterizes the highly concentrated liquid carbonate–sulfide phase–liquid chloride phase–low-density gas phase equilibrium. A decrease in the pressure of heterophase carbonate–chloride–sulfate fluid leads to a noticeable enrichment of its chloride phase with Cu, Mo, Fe, W, Ag, Sn, Sb, and Zn relative to the carbonate–sulfate phase. The processes of redistribution of ore elements between the phases of heterophase fluids can be considered a model of generation of metal-bearing chloride fluids, which occurs in nature during the formation of porphyry Cu–Mo(Au) deposits, as well as a model of generation of gas fluids supplying Au, Te, As, and other ore elements to the place of formation of epithermal Au–Cu and Au–Ag mineralization.© 2015, V.S. Sobolev IGM, Siberian Branch of the RAS. Published by Elsevier B.V. All rights reserved. 相似文献
20.
作为目前我国规模第一的冈底斯巨型铜多金属成矿带,其东段斑岩铜多金属找矿已取得历史性重大突破,发现了驱龙、甲玛等一系列大-超大型矿床。而西段由于复杂的构造背景、不便的交通条件、极低的地质研究和矿产工作程度,相对于东段具有不同的地壳结构和性质,不均一的地幔属性及壳幔作用方式,以及大面积的火山岩覆盖,使得冈底斯西段的成矿类型、找矿潜力等存在很大的不确定性和争议。在科学技术部、中国地质调查局等大力支持下,通过应用赵鹏大院士的“地质异常成矿预测理论”及开展的一系列技术方法创新、靶区优选与应用示范,在厘清区域成矿规律、发现新矿种、新类型、新矿床等方面均取得重大进展或突破,新发现了帮布勒铅锌银铜、拔隆银铅锌锡、打加错银铅锌、诺仓铅锌银钨、桑莫拉锡金等一批具有中-大型以上找矿前景的银锡金铜铅锌钨矿床,而且还发现冈底斯东、西段成矿存在极大差异:西段除了传统的斑岩型铜钼金、夕卡岩型铁铅锌铜(银)等矿床外,与陆相(次)火山岩有关的浅成低温热液型银锡(金)多金属矿床、特别是银锡或独立银矿床,是冈底斯西段最有找矿潜力的矿床类型(类似于东段的斑岩型),主要受古老基底、逆冲推覆构造、火山机构及次火山岩、晚古生代地体建造等的耦合控制。化探异常元素主要为Ag、Pb、Zn、Sn、Cu、Au、As、Sb、Mn等,其中高强度的Ag、Sn、Au是特征性异常元素,从而可以与单纯的夕卡岩型、岩浆热液型矿床相区别。这些矿床主要分布在冈底斯火山岩浆弧和弧背断隆带,与不同期次和成因的火山岩浆活动密切相关,据此划分出与晚三叠世弧岩浆作用有关的斑岩型铜金、与早白垩世弧岩浆作用有关的夕卡岩-浅成低温热液型铁银铅锌(锡)、与晚白垩世岩浆作用有关的夕卡岩型铁铜铅锌(银)、与古新世—始新世中酸性侵入岩有关的斑岩-夕卡岩型铁铜钼铅锌(银)、与古新世陆相(次)火山岩有关的浅成低温热液型银铅锌(锡金)、与中新世岩浆作用有关的斑岩-夕卡岩-浅成低温热液型铜钼金铅锌银6大成矿系列,明确了冈底斯西段的矿种、找矿类型及找矿方向,并客观评价了其资源潜力。根据成矿地质条件、已知矿床的分布以及找矿前景等要素,在冈底斯西段进一步划分出隆格尔铅锌铁铜、尼雄—日阿铁铜、朱诺—罗布真铜钼金、查个勒—诺仓银锡铅锌铜钼、热布喀银锡铅锌等5个矿集区,特别是朱诺—罗布真、查个勒—诺仓2个矿集区呈现出巨大的找矿前景,将会成为冈底斯西段最重要、最能取得重大突破的铜多金属、银锡多金属勘查基地,为该带进一步的找矿勘查工作部署提供了决策依据及目标。 相似文献