共查询到19条相似文献，搜索用时 156 毫秒
1.
广东陆丰发现黝铜矿族系列矿物。根据矿物硬度、反射率、Ｘ衍射和电子探针分析数据，鉴定其为黝铜矿、砷黝铜矿、锌锑黝铜矿、锌砷黝铜矿、铋砷黝铜矿和碲砷黝铜矿。研究表明，在陆丰矿床中发现如此多黝铜矿亚种以及Ｆｅ、Ｚｎ、Ａｓ、Ｓｂ、Ｂｉ和Ｔｅ分别呈全完类质同象系列是极为罕见的。通过黝铜矿系列的研究，为在该区乃至东南沿海找矿开拓了新的思路 相似文献
2.
斑岩铜矿研究的若干进展 总被引：18，自引：0，他引：18
综述了近年来斑岩铜矿研究领域取得的最新成果，包括6个方面：（1）斑岩铜矿与岩浆的氧化状态有关，只有氧化型岩浆才能形成斑岩铜矿，并提出了确定岩浆氧化状态的新标志；（2）岩浆中硫和氯的含量，存在状态，溶解度等对成矿有重要控制作用；（3）岩浆能否较早达到水过饱和状态，并发生流体相的出溶是成矿的另一个控制因素；（4）俯冲板片释放出的流对对上覆楔形地幔的交代作用是形成含矿岩浆的重要环节；（4）岩浆混合或底侵作用可能在某些斑岩铜矿成矿中起到了重要作用。（5）提出了一些新的成矿及找矿标志，如早期磁铁矿蚀变相。 相似文献
3.
4.
中条山铜矿研究新进展 总被引：2，自引：0，他引：2
中条山铜矿研究新进展叶德隆，朱勤文（中国地质大学，武汉，４３００７４）山西中条山铜矿区是重要的铜资源基地，主要铜矿类型有横岭关型、铜矿峪型和胡－篦型。其中分布于垣曲和闻喜县境内胡家峪－篦子沟一带的胡－篦型铜矿，规模较大，品位较高，是该区主要工业矿床。... 相似文献
5.
新疆康古尔塔格金矿床的副氯铜矿发现及其地质意义 总被引：1，自引：0，他引：1
新疆康古尔塔格金矿发现的副氯铜矿,在我国尚属首次。通过X-衍射分析方法对其做了进一步的确认,通过副氯铜矿的差热分析数据,分析了副氯铜矿的形成条件,由其化学成分计算出晶体化学式。副氯铜矿的发现,进一步丰富了我国氧化带矿物学的内容,而且作为特征矿物,也可做为寻找铜铅锌等多金属硫化物矿床及金铜矿床的找矿标志。 相似文献
6.
基于模糊逻辑的中甸岛弧斑岩型铜矿定位预测 总被引：7，自引：2，他引：7
文章选择中甸岛弧地区中比例尺地表填图所圈定的侵入岩及火山岩、航磁解译构造格架及汇水盆地沉积物多元素异常作为斑岩型铜矿定位预测的主要方法,总结提出了该区斑岩型铜矿的定位预测准则,并根据该准则在GIS平台上基于模糊逻辑模型进行了模糊成员权重赋值和模糊推理网络构建。通过模糊推理计算得到该区不同高度、不同方向航磁解译构造的交汇部位以及不同元素的组合异常特征,最终确定了该区可以发现斑岩型铜矿的模糊概率分布图。该区主要矿床如普朗、红山和雪鸡坪等均处于高模糊概率分布区,经野外检查验证发现普上和地苏嘎两处斑岩铜矿矿化新区。 相似文献
7.
物探在新疆土层地区铜矿找矿中的应用—兼谈斑岩铜矿“三位一体”的找矿模式 总被引：7，自引：0，他引：7
土屋铜矿带是我国新发现的重要斑岩成矿带，在土屋东矿点评价中开展物探剖面测量发现土屋激电异常，异常查证导致土屋铜矿的发现，沿成放带开展大面积1：2万激电，磁法测量，发现了一系列激电异常，通过地质调查，钻探查证相继发现了延东铅矿和灵龙铜矿，在研究斑岩铜矿地质条件和东天山地区干旱景观条件的基础上，建立了斑岩铜矿“三位一体”（斑岩，孔雀石化，激电异常）的找矿模式。 相似文献
8.
陕西勉县—略阳—阳平关及周边地区矿产资源调查新进展 总被引：1，自引：0，他引：1
１区域概况勉县—略阳—阳平关及周边地区与陕甘川三省相邻，构造位置处于秦岭造山带与扬子地块西北缘的接合部，属摩天岭准地块东延部分，面积约１７００ｋｍ２。该区域是由北部勉县—略阳—康县构造混杂带和南部汉江断裂带与秦岭、扬子构造单元分隔的构造三角区。该区是陕西省重要金属矿产地，已发现有铁、金、镍、铜、铅锌、银、锰、钴矿床（点）１５０余处，其中大型铁矿床２处、大型镍矿床１处、大中型金矿床３处、中小型铜铅锌多金属矿床３处。与超基性岩有关的构造蚀变岩型金矿（煎茶岭金矿床）、海相火山气液型铜矿（铜厂铜矿床）是… 相似文献
9.
山东省沂源县金星头地处沂源-沂南金及多金属成矿带北部,该成矿带位于中国东部矽卡岩金多金属矿带中北部,属于环太平洋带组成部分。通过对该区的地质、地球化学特征等分析,运用1∶1万土壤地球化学测量方法,发现了一批以Au为主的化探异常,对部分异常运用岩石地球化学测量和探槽进行查证,发现具有工业品位的金铜矿（化）体5处,提出下一步找矿的工作重点地段,即在中生代燕山晚期中偏碱性或中酸性侵入杂岩体与寒武纪朱砂洞组、馒头组白云岩、灰岩等接触部位及两侧寻找接触交代型（矽卡岩）金铜矿床。 相似文献
10.
滇黔桂三角区微细浸染型金矿床成矿热液一种可能的演化途径：年代… 总被引：19，自引：1，他引：19
本文主要根据年代学资料和金活化迁移的地球化学尾性，探讨了滇黔桂三角区微细浸染型金矿床成矿热液的演化途径。多种定年方法揭示，该区金成矿初始流体（古流体）的年龄为２６０Ｍａ左右；金成矿年龄约为１４０￣７５Ｍａ。考虑到该区燕山晚期岩浆岩富含Ｃ１，本文认为古流体（２６０￣１４０Ｍａ）向成矿流体（１４０￣７５Ｍａ）的转化，可能主要是通过燕山晚期岩浆活动产生的富氯流体加入原已存在的贫氯古流体，从而使这种新的混 相似文献
11.
The Cu hydroxy mineral, atacamite, is commonly associated with saline environments and is generally thought to dissolve rapidly in the presence of fresh water. A Cu contaminated soil from the arid Namaqualand region, South Africa, shows atacamite as the dominant Cu containing mineral. The stability of the Cu phase in this soil was determined through equilibrium and leaching studies using both deionised water (DI) and a concentrated (0.5 M) NaCl solution. Initially a high concentration of exchangeable Cu was released from the soils leached with NaCl. Continued leaching with NaCl resulted in a substantial decrease in Cu release as atacamite equilibria started to control dissolved Cu. This suggests that an initial spike of Cu laden water will leach from the soils at the onset of a large rainfall event. Further additions of water will result in a lower but sustained release of Cu from the soil. The Cu contaminated soils are exposed to acidic sulphate leachate thus the dissolution kinetics of synthetic atacamite in the acidic range (pH 5.5–4.0) was determined in both NaCl and DI solutions. The kinetic data showed that atacamite dissolution rates are significantly higher in DI than in NaCl but the rates converge at pH 4. In comparison to common acid soluble minerals, atacamite displays a moderate dissolution rate (10−9.55–10−7.14 mol m−2 s−1) within the acid range (pH 5.5–4.0). The atacamite dissolution reaction order with respect to pH is 1.3 and 1.6 in DI and NaCl solutions, respectively, suggesting that dissolution rates of atacamite are highly pH dependent in the acid range. The type of acid used to lower the pH had no effect on the reaction kinetics, with HNO3 and H2SO4 resulting in comparable dissolution rates of atacamite at pH 4.5. 相似文献
12.
Martin Reich Carlos Palacios Miguel A. Parada Udo Fehn Eion M. Cameron Matthew I. Leybourne Alejandro Zúñiga 《Mineralium Deposita》2008,43(6):663-675
The presence of large amounts of atacamite in oxide zones from ore deposits in the Atacama Desert of northern Chile requires
saline solutions for its formation and hyperarid climate conditions for its preservation. We investigated the nature and origin
of atacamite-forming solutions by means of coupling groundwater geochemical analyses with fluid inclusion data, high-resolution
mineralogical observations, and chlorine-36 (36Cl) data in atacamite from the Mantos Blancos and Spence Cu deposits. In both deposits, the salinities of fluid inclusions
in atacamite are comparable to those measured in saline groundwaters sampled from drill holes. The average salinity of fluid
inclusions in atacamite for the Mantos Blancos and Spence deposits (~7–9 and 2–3 wt.% NaCleq, respectively) are strongly correlated to the salinities at which gypsum supersaturates from groundwaters in both deposits
(total dissolved solids ~5–9 and 1–3 wt.% NaCleq, respectively). This correlation is confirmed by transmission electron microscopy observations of atacamite-bearing samples,
revealing an intimate association between atacamite and gypsum that can be traced down to the nanometer scale. 36Cl data in atacamite provide new lines of evidence concerning the origin and age of the saline waters that formed atacamite
in various stratabound and porphyry Cu deposits from the Atacama Desert. All atacamite samples show very low 36Cl-to-Cl ratios (11 × 10−15 to 28 × 10−15 at at−1), comparable to previously reported 36Cl-to-Cl ratios of deep formation waters and old groundwaters. In addition, 36Cl-to-Cl ratios in atacamite correlate with U and Th concentration in the host rocks but are independent from distance to
the ocean. This trend supports an interpretation of the low 36Cl-to-Cl ratios in atacamite as representing subsurface production of fissiogenic 36Cl in secular equilibrium with the solutions involved in atacamite formation. Therefore, 36Cl in atacamite strongly suggest that the chlorine in saline waters related to atacamite formation is old (>1.5 Ma) but that
atacamite formation occurred more recently (<1.5 Ma) than suggested in previous interpretations. Our data provide new constraints
on the origin of atacamite in Cu deposits from the Atacama Desert and support the recent notion that the formation of atacamite
in hyperarid climates such as the Atacama Desert is an ongoing process that has occurred intermittently since the onset of
hyperaridity. 相似文献
13.
Martin Reich Carlos Palacios Macarena Alvear Eion M. Cameron Matthew I. Leybourne Artur Deditius 《Mineralium Deposita》2009,44(6):719-722
Recent studies have suggested the involvement of highly saline deep formation waters that modified preexisting Cu assemblages
to form atacamite during supergene oxidation of Cu deposits in the Atacama region. In this report, we document the occurrence
of (Ag–I) inclusions hosted by supergene chalcocite from Mantos de la Luna, an argentiferous Upper Jurassic stratabound Cu
deposit in the Coastal Range of northern Chile. The presence of this unusual mineral assemblage indicates that iodargyrite
precipitated from reducing iodine-rich waters, suggesting that the fluids involved in supergene enrichment of Cu deposits
in the Coastal Range were more complex than previously thought. This suggests the prevalence of hyperarid conditions during
the latest stages of supergene enrichment of the Mantos de la Luna Cu deposit in the Atacama region, supporting the notion
that supergene enrichment processes in hyperarid areas are dynamic in nature and do not exclusively require the presence of
meteoric water. 相似文献
14.
Paleozoic Epithermal Au and Porphyry Cu Deposits in North Xinjiang, China: Epochs, Features, Tectonic Linkage and Exploration Significance 总被引：31，自引：1，他引：31
Kezhang Qin Shu Sun Jiliang Li Tonghui Fang Shulai Wang Wei Liu 《Resource Geology》2002,52(4):291-300
Abstract. Based on field investigation of large number of ore deposits including some latest discoveries and multidiscipline comprehensive research, we demonstrated the general features of metallic deposits and we suggest that Paleozoic archipelago-type collisional orogen at North Xinjiang, northwestern China show intimate similarity with the metallogenesis of Southeast Asia Cenozoic archipelago. We briefly described the characteristics of major porphyry-type, skarn-type Cu deposits and typical high-sulfidation type (HS-type) and low-sulfidation type (LS-type) epithermal Au deposits as well as some latest discoveries. Systematic isotopic age-dating on the Tuwu-Yandong superlarge porphyry Cu deposits revealed that they formed in Late Devonian to Early Carboniferous in an accretionary arc setting. The tectonic settings of epithermal Au deposits and its linkage with porphyry Cu deposits are further discussed. The formation condition for porphyry Cu deposits is more strict than epithermal Au deposits. The distribution width for porphyry Cu deposits in the orogenic belts is more limited than epithermal Au deposits. The discovery and prospecting progress of the Kalatage HS-type Cu-Au deposit were reported. The significance in further exploration was suggested. 相似文献
15.
中国新疆及周边国家和地区是全球性中亚巨型成矿域的重要组成部分。黑色岩系矿床、斑岩矿床、块状硫化物矿床、陆相火山岩金矿床、与富碱性侵入岩有关矿床和砂岩铜矿等几种重要的典型矿床类型在该成矿域均已有不同程度的发现,特别是近几年来在该成矿域相继发现多个大型和超大型矿床的事实,说明中亚成矿域具有独特的成矿特点和巨大的找矿潜力。笔者通过分析研究中国新疆及周边国家和地区大型或超大型矿床的成矿规律和典型矿床特征,对新疆及相邻地区的大型或超大型矿床的找矿方向提出了见解。 相似文献
16.
Zheng Youye Duo Ji Cheng Shunbo Gao Shunbao Dai Fanghua 《Frontiers of Earth Science》2007,1(2):226-232
Recent mineral exploration in the Gangdise porphyry copper deposit belt, an important component of the Himalaya-Tethyan metallogenic
belt, has led to the discovery of a number of deposits, as exemplified by the world-class Miocene Qulong porphyry Cu deposit.
This paper reviews major advances in the studies of ore genesis and metallogenic regularity and progresses in mineral exploration
of porphyry Cu deposits in the belt. Existing problems and suggestion for future exploration also are given. 相似文献
17.
新类型难识别矿地球化学勘查 总被引：2，自引：0，他引：2
讨论了4种新类型难识别矿的地球化学勘查研究进展,包括使用深穿透地球化学方法在吐哈盆地砂岩型铀矿的试验和在胜利油田伴生金的地表地球化学显示,从全国铂的地球化学分布看西南黑色岩系中寻找铂族元素的前景,地球化学填图增加到70余种元素分析对稀有、分散元素的研究和寻找将起到巨大的作用。 相似文献
18.
《International Geology Review》2012,54(7):846-878
The Da Hinggan Mountains mineral province (DHMP), northeastern China, is divided into three tectonic units and corresponding metallogenic belts. The tectonic units of the Da Hinggan Mountains are the Erguna fold zone on the northwest, the Hercynian fold zone on the north, and the Hercynian fold zone on the south. The corresponding metallogenic belts are the Erguna Cu-Pb-Zn-Ag-Mo-Au belt of the NW DHMP, the Cu-Pb-Zn-Mo-Fe-Au belt of the northern DHMP, and the Pb-Zn-Ag-Cu-Sn-Fe-Mo belt of the southern DHMP. Distinct ore bodies, mostly associated with Mesozoic granites and volcanics, comprise (1) hydrothermal vein deposits including Pb-Zn-Ag-(Cu) and W‐Sn-Cu, (2) exhalative (Pb-Zn-Ag, Cu) deposits, (3) porphyry (Cu, Au, Mo), (4) skarn (Fe, Zn, Cu), and (5) epithermal Au-Ag deposits. The hydrothermal veins are hosted by a range of different rock types, whereas the exhalative ores are confined to Permian strata. The porphyry deposits occur within granite porphyries. The epithermal deposits are related to Mesozoic volcanic-subvolcanic rocks and occur within superjacent igneous structures. The first type, represented by the Bairendaba deposit, shows many characteristics of hydrothermal deposits. The second type occurs in a Permian clastic-chemical sedimentary sequence. Most Fe-Zn-Cu deposits related to granites and granodiorites are skarns. Granodiorite and granite-related deposits are typical porphyry ores, formed during Hercynian and Mesozoic time. Promising metallogenic conditions and the recent discovery of many large metal deposits indicate that this mineral province has a great exploration potential. 相似文献
19.
Abstract. Formation conditions of some vein-type copper deposits of the Tocopilla district (Deseada, San Jose, Santa Rosa) and the Gatico district (Yohanita, Toldo-Velarde, Argentina) in the Coastal Cordillera of northern Chile were inferred from mineral paragenesis and fluid inclusion data, and were compared with those of neighboring stratiform copper deposits. The vein-type copper deposits are hosted in Late Jurassic dioritic to quartz-dioritic plutons intruding extensively an andesite-dominant volcanic pile of the Jurassic La Negra Formation. Primary mineralization is characterized by chalcopyrite + magnetite + pyrite + bornite, and supergene alteration of these minerals produced anilite, covellite, atacamite and chrysocolla. The hypogene mineral assemblage indicates relatively high sulfur fugacity and weakly oxidized conditions, distinct from the stratiform copper deposits formed under low sulfur fugacity and moderately oxidized conditions. Furthermore, the fluid inclusion data of the vein-type deposits indicate high temperature (401–560C) and high salinity (39–68 wt% NaCl equiv.) ranges in contrast to the stratiform deposits, suggesting that this type of deposits formed by magma-associated hypersaline ore fluids. 相似文献