西昆仑塔什库尔干铁矿带矿床类型、成因及成矿规律
作者:jnscsh 时间:2022-02-11 08:42:55 浏览次数:次
总结了区域含矿建造的特征、时代、矿床类型及成矿规律。结果表明:西昆仑塔什库尔干地块原“布伦阔勒群”实际上发育古元古代(2 100~2 500 Ma)、寒武纪早期(510~540 Ma)等两期沉积成矿事件,同时在中晚元古代(800~1 800 Ma)和海西期—印支期(200~410 Ma)分别发生过强烈的变质和变形作用,局部富矿的形成可能与后期热液的叠加改造作用有关。区域铁矿可划分为两类:一为条带状铁建造遭受后期热液叠加改造的沉积变质型铁矿床,如赞坎、莫喀尔和吉尔铁克沟铁矿床,其形成环境为早元古代活动陆缘的弱氧化—还原的浅海相沉积环境,成矿物质来源于海底热液对基性火山岩的淋滤及少量陆源物质的风化;二为早寒武世海相火山-喷流沉积型铁矿床,如喀来子、老并和叶里克铁矿床,其形成条件为半深海—浅海相、弱氧化—半氧化的断陷盆地环境,成矿成岩物质主要来源于海底热水沉积及陆源物质。根据区域成矿规律,推测卡拉本—喀来子—莫拉赫一带是寻找早寒武世与海底喷流成矿系统有关的铁-多金属矿的有利地区,吉尔铁克沟—赞坎北地区、莫喀尔及其以南地区是赞坎铁矿带的北延和南延,是寻找古元古代沉积变质型铁矿的有利地区。
关键词:铁建造;矿床类型;矿床成因;成矿规律;沉积变质;喷流沉积;塔什库尔干地块;西昆仑
中图分类号:P618.31 文献标志码:A
Abstract: Based on the studies of the geological evolution, field investigation of the ore-bearing rock series, zircon U-Pb isotope chronology and typical iron ore deposits of Taxkorgan Block in West Kunlun, the characteristics and forming ages of regional ore-bearing formation, ore deposit type and metallogenic regularity were summarized. The results show that the previously defined “Bulunkuole Group” actually contains Paleoproterozoic (2 100-2 500 Ma) and Early Cambrian (510-540 Ma) sedimentary metallogenic events, which are suffered to the intensely metamorphism and deformation in both Middle-Late Proterozoic (800-1 800 Ma) and Hercynian-Indosinian (200-410 Ma). Moreover, the genesis of the local high-grade ores may be related to the later hydrothermal activities. The regional iron deposits can be divided into two types. The first one is the meta-sedimentary type iron deposit that is superimposed and transformed by the later hydrothermal fluids; taking Zankan, Mokaer and Jiertiekegou as examples, they form in weakly oxic to reducing marine sedimentary environment of Early Proterozoic active continental margin and the metallogenetic materials are derived from the leaching of basic volcanic rocks by seafloor hydrothermal fluids and a small amount of terrigenous sediments input. The second type is the Early Cambrian marine volcanic exhalative sedimentary iron deposit, such as Kalaizi, Laobing and Yeleke sulfate-iron deposit; their depositional environment should be bathyal-neritic facies weakly oxic to suboxic faulted basin; and the ore-forming materials come from the submarine hydrothermal sedimentary and terrigenous materials input. According to the regional metallogenic regularity, it is speculated that Kalaben-Kalaizi-Molahe belt is the favorable area for prospecting the iron-polymetallic deposits, which associate with the Early Cambrian marine exhalative metallogenic system. While, Jiertiekegou-Zankanbei area, Mokaer and its southern area, which are the northward and southward extensional zones of Zankan iron ore belt, are both the favorable areas for prospecting the meta-sedimentary type of Paleoproterozoic iron deposits.
[西昆仑塔什库尔干铁矿带矿床类型、成因及成矿规律]相关文章
- 深部地质结构对浅层地质与成矿作用的制约
- 浅析区域成矿学在地质矿产找矿过程中发挥的作用
- 金属矿成矿地质特征及找矿前景预测
- 区域成矿学在找矿中的应用研究
- 云南安宁石坝山磷矿床地质特征及成矿作用分析
- 辽西务欢池一带铁矿成矿地质条件与找矿潜力分析
- 浅析辽宁省泉眼沟硅灰石矿地质成矿条件
- 对区域成矿学的几点看法
- 陂头—石上萤石矿床成矿地质条件及成因探讨
- 辽宁省早古生界熔剂石灰岩成矿条件及成矿规律
- 地学大数据背景下的矿床统计预测教学方法探讨
- 东昆仑哈西亚图铁多金属矿床蚀变分带研究
- 阐述矿床学理论在地质找矿中的作用
- 关于内蒙古高尔旗矿业有限公司矿区矿床开采技术条件的分析
- 矿床开采技术条件的勘查研究
- 论述霍吉河钼矿床的成因及远景评价
- 浅谈我国收入分配差距成因的思考
- 浅谈我国收入分配经济差距的成因
- 小学生常见心理问题成因分析及对策
- 试论初中英语学困生的成因及对策分析
- 目前关于地震成因的主要观点
- 汽车机械故障成因与维修处理信息化分析
- 浅论汽车尾气造成的危害及成因
- 政府年底“突击花钱”的成因及对策
- 某工业锅炉大面积腐蚀的成因分析
- 工业锅炉垢下腐蚀缺陷成因分析
- 铁矿石资源谈判的挑战与我国钢铁工业的发展
- 寻找铁矿石
- 承包地上发现铁矿石,所有权应归谁
- 大红山铁矿土地复垦规划及恢复研究
- 长三角地区进口铁矿石运输网络的优化
- 长三角北翼铁矿石码头的选址及发展建议
- 上一篇:巴尔喀什北部斑岩型铜钼矿遥感成矿预测
- 下一篇:地理调查法破解旅游资源开发评价难题