塞浦路斯黄铁矿矿床的成因

黄铁矿矿床的地质概况塞浦路斯岛的中心由特罗多斯火成杂岩体组成,其边部为层状沉积岩.主要的黄铁矿矿床即产于火成杂岩体与上覆沉积物的接触带上或其附近.最下部的沉积层为佩拉佩德希层,该层局部含有火山碎屑-沉积岩,但总的看来,它以独立的单位发育.主要的黄铁矿矿床与该层密切伴生,据推测,二者具有相同的成因.分类与说明浸染状、块状、脉状、洞穴和(或)空隙     

塞浦路斯含铜黄铁矿矿床成因的最新研究成果

最近,人们提出形成塞浦路斯的特罗多斯地块内的蛇绿岩硫化物矿床的热液来沅于海水。这一假说是通过液包体中所保留下来的热液样品的冰冻点的测定和成矿物质的锶同位素组份的测定而证实的。从8个网脉状矿床采集的9个样品中,石英内的液包体的均化温度为301±14℃(30个测定结果)～351±4℃(20个测定结果)。液包体冰冻点的205个测定结果的平     

甘肃白银厂和青海德尔尼黄铁矿型铜矿与塞浦路斯铜矿的成因对比

论述了甘肃省白银厂和青海省德尔尼黄铁矿型铜矿床的地质背景、成矿特征和成因,并与塞浦路斯的一些铜矿床进行了对比,认为这些矿床的特征与现代大洋硫化物矿床的特征基本一致,当属海底热泉成因的硫化物矿床。文中提出了热泉成因矿床的一般模式。同时分析了各矿床成矿作用的特殊性。     

祁连山区黄铁矿型铜矿

本文系扼要的对祁连山区黄铁矿型铜矿的介绍,其中有一些系著者的看法,值此引人注意的铜矿类型,希望大家来讨论。     

新疆阿舍勒铜矿黄铁矿标型特征及矿床成因意义

新疆阿舍勒铜矿黄铁矿标型特征及矿床成因意义任秉琛（地质矿产部西安矿产地质研究所，西安７１００５４）关键词黄铁矿标型，矿床成因意义，新疆阿舍勒铜矿属海底喷气火山成因含铜黄铁矿型矿床，黄铁矿是其中分布广、数量大的矿石矿物。１黄铁矿形态标型多数情况下为他形...     

黄铁矿型矿床的成分特点

在苏联地质学家向第28届国际地质大会提交的论文中,H??和H.E.Cepreepa认为,红海海底现代沉积物和世界大洋裂谷带内正在活动的含矿体系的发现,是含铜黄铁矿成矿作用问题研究的新阶段.根据化学成分和矿物成分确定的含矿沉积物和含硫化物的活动成矿体系的锥状、管状机构,完全可以与黄铁矿型锌-铜矿石对比.现已公认,火山岩层中的块状黄铁矿矿石是在热液体系减压部位上部或附近的海底堆积形成的.它们具有较简单的成分,铜、锌和铅硫化物数量变化不定. 显生宙塞浦路斯型、乌拉尔型和黑矿型黄铁矿矿床,以及各种前寒武纪的矿床,不仅总的矿物成     

阿舍勒黄铁矿型铜矿床地质特征

本文通过对矿床的成矿地质条件、控矿因素和物质组份的分析研究,认为该矿为火山成因块状黄铁矿型铜矿。矿体受火山机构控制,产于火山穹窿叠加背斜构造中或火山管道及火山口附近。矿体形态复杂、矿床规模大、品位富、矿种多,矿化垂直分带明显,可作为典型矿床进行研究,以期找到同类矿床。     

黄铁矿型矿床的地质与成因

据外刊报道,在25届国际地质会议上,与会学者讨论了黄铁矿型矿床的成因.许多地质学家把这种矿床叫做与火山活功伴生的层状矿床;没有一篇报告认为此类矿床是与花岗岩岩浆作用有亲缘关系.澳大利亚的斯坦顿划分了四个火山活动期,①太古代,只有少数与苦橄岩火山活动有关的"汤普松"式黄铁矿型矿床产出.②元古代,如澳大利亚的布罗肯-希尔、茫特-艾萨.这类矿床,成因上与从玄武岩到     

论德尔尼黄铁矿型铜 钴矿床的地质特征及其与塞浦路斯铜矿的区别

通过对德尔尼铜 钴矿床与塞浦路斯铜矿的对比,进一步明确了德尔尼铜 钴矿床为与印支期黑云花岗岩有成因联系的岩浆热液矿床。矿区的超基性岩或超基性火山角砾岩都是不含矿的,与矿床无成因联系;底辟上升侵位也不存在。将德尔尼铜 钴矿床作为火山岩块状硫化物矿床系列中的最基性端员缺乏依据。     

祁连山黄铁矿型铜矿及其勘探

祁连山黄铁矿型铜矿的勘探工作目前已基本结束。已得资料还未能进行全面的综合研究,本文只着重于矿区地质及勘探方法的摘要报导。至于有关矿区地质的系统报告,1955年宋叔和、李铭德都已著文发表,可以说,初步地对矿床有关问题作了叙述和论证。     

论德尔尼黄铁矿型铜钴矿床的地质特征及其与塞浦路斯铜矿的区别

通过对德尔尼铜钴矿床与塞浦路斯铜矿的对比,进一步明确了德尔尼铜钴矿床为与印支期黑云花岗岩有成因联系的岩浆热液矿床。矿区的超基性岩或超基性火山角砾岩都是不含矿的,与矿床无成因联系;底辟上升侵位也不存在。将德尔尼铜钴矿床作为火山岩块状硫化物矿床系列中的最基性端员缺乏依据。     

菲律宾与蛇绿岩有关的黄铁矿型铜矿和铬铁矿简介

笔者于1985年12月,有机会参加在马尼拉举行的国际矿床模式讨论会(Symposium on Mineral Deposit Modelling),会议期间对菲律宾Zambales山的Acoje和Coto铬铁矿山、Barlo块状硫化物铜矿床进行了参观。国际矿床模式讨论会由菲律宾矿山与地质科学局(BMG)、菲律宾地质学会(GSP)和国际地科联IUGS/UNESCO主办,目的是讨论近十几年来对热液金矿床、块状硫化物铜矿床和铬铁矿床在构造和金属成矿作用方面取得的新知识。     

白银厂黄铁矿型矿床成矿模式

白银厂黄铁矿型矿床位于北祁连加里东褶皱带东段,区内下古生代火山活动强烈,沿北西西方向分布两条火山岩带,这两个带上已知有黄铁矿型矿床(点)约50多个,是我国重要的铜及多金属矿远景区,白银矿黄铁矿型矿床位于南部火山岩带中。     

金银矿床中黄铁矿的标型特征

黄铁矿是一种遍在矿物,从岩浆矿床→热液矿床→沉积矿床→变质矿床中,几乎都有产出. 在热液矿床中黄铁矿与金的关系尤为密切,绝大多数原生金一银矿床中都有大量黄铁矿产出.例如:金-黄铁矿-石英脉;金     

四川拉拉铜矿黄铁矿标型特征研究

本文通过大量的地质资料,详细论述了拉拉铜矿黄铁矿的产状及结晶习性,黄铁矿的硬度,晶胞参数;反射率,化学成分及微量元素特征,并以此与典型矿床中黄铁矿标型特征对比,认为本矿床黄铁矿主要为火山喷气沉积作用的产物,少量为后期变质作用形成。     

南乌拉尔黄铁矿型铜矿中金的分布特征

为了更加充分利用南乌拉尔铜矿中的多种元素,弄清金的分布规律是有重要实际意义的.本文以盖依铜矿、南盖依铜矿、塞巴依铜矿、莫洛焦日铜矿等矿区为例,阐述这类矿床中金的一些分布特征.彼得洛夫斯基和普舍尼契尼曾通过他们的研究工作,划分出三个共生矿物组合,即:(1)早期的,为杂有细粒黄铜矿矿物的黄铁矿矿石和杂有细粒黝铜矿、闪锌矿、重结晶的粗粒黄铁矿和黄铜矿的黄铜矿矿石;(2)晚期的,为黄铁矿-黄铜矿-闪锌矿矿石,含黝铜矿的闪锌矿-方铅矿矿石,黄铁矿-斑铜矿矿石;(3)末期的,为石英、碳酸盐、重晶石、纯闪锌矿、     

祁连山白银厂黄铁矿型矿床成因探讨

The Baiyinchang mining area, an important industrial base of base metals in China, consists of five pyrite type deposits of different sizes, four of which have already been worked. These five deposits might be grouped into two types: Cu-bearing (predominatingly Cu) pyrite type deposits, such as Zheyaoshan, Huoyanshan and Tongchanggou, and polymetallic pyrite deposits containing principally Cu, Pb and Zn, such as Xiaotieshan and Sigejuan. These two types of deposits occur close to each other in the same formation-Baiyinchang spilite-keratophyre sequence and have similar structures and petrofacies, suggesting the possibility of forming two different types of deposits in the same tectonic unit and volcanic rock series. The deposit lies in the eastern part of the volcanic complex within the Qilian eugeosyncline, its genesis remains a problem of much controversy. Ln recent years, the author has made an integrated study and analysis of the data accumulated over the past thirty years and also performed some field investigation to check up these references. The results acquired have led him to postulate the hypothesis that the deposit was formed by the concentration of volcanic hydrothermal fluids in depression and the activity of subvolcano-magmatic fluids. The formation of the massive pyrite in the main ore body of Zheyaoshan is believed to be the result of the lateral effusion from the Qingshanbao vent of the third subcycle appearing presently as silicic rock formation, i.e., the result of the accumulation in the second subcycle crater depression of the ore material effused from the pyrrhotite ore chimney. This might be borne out by the existence of abundant massive copper-bearing pynhotite ore with well-developed textures of corrosion and replacement in the chimney as well as by the ring-like distribution of the metallic minerals around the chimney caused by the spread of the fluids from this center. Geological mapping and analyses of the data of drill core and petrofacies support the claim that the ore body is located at the crater depression. Minerals in massive pyrite ore body are coarse in the west and fine in the east, suggesting also the migration of ore fluids from east to west into the center of depression. The massive ore body cutting obliquely the strata, the relatively weak alteration of country rocks and the remarkable variation in copper content of the ore body all seem to have resulted from the ascending movement of the copper-bearing ore fluids brought by subvolcanic activity along the ore chimney and its fracture zone formed during the crustal reversion. The Xiaotieshan polymetallic pyrite deposit is of subvolcano-magmatic fluids type. Its ore-forming processes were strictly controlled by late subvolcanic activity which, in turn, was governed by fracturing. The ore body overlies the hanging wall of quartz albitophyre and shows close relationships with subvolcanic rocks in dimension and grade while the texture and structure of ore and the mineral constituents vary in accordance with the diverse country rocks. The examination of the structure of volcanos, fractures, variation in petrofacies, regularity of subvolcanic activity, the extent of wall rock alteration and characteristics of mineralization, therefore, makes up the prerequisite for the search of such concealed ore deposits. The Jinfangou ore belt expends along a EW striking fracture zone characterized by complex lithological characters and petrofacies as well as by frequent subvolcanic activities. Mineralization and ore bodies are exclusively confined to the fracture zone. The repeated crustal reversion during: the late stage of the development of rock formation resulted in the folding and faulting of the strata, thus facilitating the differentiation and migration of the magma. The intrusion of the subvolcanic magma not only brought sufficient ore-bearing fluids for mineralization, but supplied heat for their migration. This is due to the fact that heat: accelerated the circulation of the ore fluids, which dissolved ore elements dispersed in the volcanic rock and unceasingly infiltrated into and replaced the country rocks as well. As a result ore fluids concentrated to form ore deposits at places with favorable structure and country rock conditions.     

祁连山白银厂黄铁矿型矿床成因探讨

白银厂黄铁矿型矿区,共有五个矿床,已相继开采四个。其中有以铜为主的含铜黄铁矿型矿床,如折腰山、火焰山、铜厂沟;有以铜-铅-锌为主的多金属黄铁矿型矿床,如小铁山。这两种类型矿床均赋存在白银厂细碧-角斑岩内,且矿体相距很近,构造、岩相相似。说明在同一构造单元、同一火山岩系内可以生成两种不同类型的矿床。该区矿床位于北祁连加里东地槽东部火山岩系内,对其成因一直有争议。有人认为矿床