Gravity and magnetic field characteristics and regional ore prospecting of the Yili ancient continent,West Tianshan,Xinjiang Uygur Autonomous Region,China     

《China Geology》2020,3(1):104-112

Gold, iron, copper, lead-zinc and other mineral exploration in West Tianshan, Xinjiang Uygur Autonomous Region, has made remarkable progress in recent years. However, due to the dispute on the tectonic division of West Tianshan, the ore-controlling factors and the regional metallogenic laws are controversial. The authors analyze regional gravity data and notice that the high-value region corresponds to the Yili ancient continent, thus the southeastern boundary of the Yili ancient continent is delineated. Comparative analysis of gravity, aeromagnetic and geologic data reveals that the Tulasu basin, where some medium to large epithermal gold deposits locate, lies above the Yili ancient continent; the Yili Carboniferous-Permian rift extends in E-W direction, numbers of copper deposits have been found in the mid-west section of the rift which lies above the Yili ancient continent, whereas few copper deposits have been discovered in the east section which is outside the Yili ancient continent. Accordingly, the Yili ancient continent may he rich in gold, copper and other metal elements; the metal-bearing hydrothermal solution moves up with the activity of magmatism, and deposits in the favorable places (the Tulasu basin and the Yili Carboniferous-Permian rift), forming numerous small and medium gold, copper deposits, as well as some large and super-large gold deposits. Therefore, the tectonic-magmatic hydrothermal zone above the Yili ancient continent should be the prospective area for epithermal gold and copper polymetallic deposits.  相似文献   

新疆库车县盐水沟北铜矿床地质特征及成因探讨          下载免费PDF全文

刘传朋 《山东国土资源》2018,34(4)

盐水沟北铜矿区位于新疆库车县北部,其大地构造位置处于塔吉克-塔里木陆块区、塔里木陆块、塔里木北缘隆起、库车前陆盆地,区内构造活动强烈。铜矿床赋存于新近纪中新统康村组第一岩性段,矿体呈层状,严格受地层控制。区内共圈定10个铜矿体,矿石矿物主要为孔雀石、赤铜矿、水胆矾、自然铜等,矿体内无夹石,顶、底板围岩均为褐红色及浅红色粉质泥岩。该矿床为砂岩型铜矿床。  相似文献   

常见稀有气体采样容器研究进展及意义     

宋宏  李立武  汤庆艳  鲍坚  苏天宝  张家和  许仕海  郑国东  李中平 《地质科学》2022,57(1):274-293

稀有气体是地学研究的重要手段之一,在研究成矿流体来源、壳幔相互作用过程中具有重要的研究意义,其组成及同位素比值是研究天体和地质体来源、成岩机理及各种地质和物理化学过程的关键,可作为地球化学示踪剂。如何有效地在大气圈、水圈和岩石圈进行稀有气体同位素样品的提取,是气体同位素研究急需解决的基础科学问题,所以气体采样容器和取样技术显得尤为重要。本文在文献调研的基础上,对常见的采样容器的优缺点进行对比,并总结了不同采样容器对稀有气体取样的优劣性。常见的气体采集容器包括不锈钢瓶、铜管、玻璃瓶、气体采样袋、注射器等,而稀有气体的采集容器常为不锈钢瓶和铜管等;通过对比表明不锈钢瓶具有耐高温、耐高压、抗强腐蚀、不易燃、不易爆等特点和优越性,在气体样品采集和运输过程中稳定性最好,实验效果也最好;铜管采样效果和密封性好,但操作较为复杂;玻璃采样容器效果次之;石英玻璃瓶虽然操作简便,但是运输保存不便;气体采样袋和注射器的采集和运输储存效果较差。因此建议稀有气体样品采集使用不锈钢瓶和铜管以及钠钙材质的玻璃瓶,不建议将石英材质玻璃容器以及注射器和气袋作为稀有气体的采样工具。该工作可为气体地球化学的研究提供新的参考。  相似文献   

新疆哈密卡拉塔格铜(锌)矿红石幅1∶50 000矿产地质图数据库     

王丰丰  邓小华  李德东  卫晓锋  吕晓强  王燕超  李永胜 《中国地质》2020,47(S2):185-195

新疆哈密卡拉塔格铜(锌)矿红石幅(K46E009008)1∶50 000矿产地质图数据库是根据《固体矿产地质调查技术要求(1∶50 000)》(DD2019-02)和行业其他标准及要求，在充分利用1∶200 000、1∶50 000等区域地质调查工作成果资料的基础上，采用数字填图系统进行野外地质专项填图，并应用室内与室外填编图相结合的方法完成。本数据库将中-上奥陶统荒草坡群大柳沟组、下志留统红柳峡组和卡拉塔格组的建造类型进行了重新划分，把图幅内侵入岩时代划分为志留纪、泥盆纪、二叠纪等3期，建立了岩浆岩演化序列。图幅区内有大中小型矿床和矿点共8个，成矿时代集中分布在志留纪、石炭纪，赋矿围岩为火山碎屑岩和次火山岩，该区优势矿产以铜锌金为主，矿床类型以VMS型和次火山热液脉型矿床为主，分布在图幅东南一带。除金属矿产外，尚有膨润土矿床产出，具有较好的找矿潜力。本数据库包含5个地层单位和3期岩浆岩资料，数据量约为 15.1 MB。这些数据充分反映了该图幅 1∶50 000 矿产地质调查示范性成果，对该区矿产资源研究和勘查等具有参考意义。  相似文献   

Adsorption of Chromium(III), Nickel(II), and Copper(II) from Aqueous Solution by Activated Alumina     

Nilima S. Rajurkar  Ashok N. Gokarn  Kumaree Dimya 《洁净——土壤、空气、水》2011,39(8):767-773

The possible use of activated alumina powder (AAP) as adsorbent for Cr(III), Ni(II), and Cu(II) from synthetic solutions was investigated. The effect of various parameters on batch adsorption process such as pH, contact time, adsorbent dosage, particle size, temperature, and initial metal ions concentration were studied to optimize the conditions for maximum metal ion removal. Both higher (molar) and lower (ppm) initial metal ion concentration sets were subjected to adsorption on AAP. Adsorption process revealed that equilibrium was established in 50 min for Cr(III) at pH 4.70, 80 min for Ni(II) at pH 7.00, and 40 min for Cu(II) at pH 3.02. Percentage removal was found to be highest at 55°C for Cr(III) and Ni(II) with 420 µm and 45°C for Cu(II) with 250‐µm particle size AAP. A dosage of 2 g for Cr(III), 8 g for Ni(II), and 10 g Cu(II) gave promising data in the metal ion removal. The adsorption process followed Langmuir as well as Freundlich models. The thermodynamics of adsorption of these metal ions on activated aluminum indicated that the adsorption was spontaneous and endothermic in nature. Present study indicates that AAP can act as a promising adsorbent for industrial wastewater treatment.  相似文献   

Global distributions of Fe,Al, Cu,and Zn contained in Earth's derma layers     

Jason N. Rauch 《Journal of Geochemical Exploration》2011

To improve the usefulness and accuracy of modeling Earth's anthrobiogeochemical metal cycles, global maps at approximately 1° × 1° are produced of the concentrations and masses of Fe, Al, Cu, and Zn contained in continental sediments and soils. The maps generated utilize inverse distance weighting (IDW) and cokriging to generate new estimates for geospatially weighted mean global concentrations for these metallic micronutrients. Sediment metal concentration maps are generated from IDW of sediment samples; global soil maps are produced via cokriging upon an underlying parent rock dataset composed of both surface bedrock and sediment samples. Derived are independent estimates for the global mean concentrations in continental sediments (Fe = 3.1 wt.%, Al = 6.1 wt.%, Cu = 45 μg/g, Zn = 86 μg/g) and soils (Fe = 2.5 wt.%, Al = 3.9 wt.%, Cu = 17 μg/g, Zn = 50 μg/g). While continental sediment concentrations for Cu are within the range of previous estimates, Zn concentrations are relatively higher, ~ 20 μg/g above previous estimates. Fe and Al are slightly depleted (~ 1 wt.%) in continental sediments relative to previous estimates, likely ascribable to sampling bias and error inherent in the comparative methodologies. Besides an estimated global mean, metal concentrations in soils are also broken down by FAO soil group. Metal masses in sediments and soils remain within 30% of previous, non-spatial estimates. These maps also illustrate the discernable spatial variability across the Earth's surface. Despite data gaps, maps of metal mass show regional patterns such as the high quantities of Al in the soils and biomass of the Amazonia and Congo regions. Concentrations of metals are relatively high in the anthrosols of China. Finally, this analysis highlights those areas for which generating and providing publically available geochemical data should be prioritized. For instance, gypsisols, lixisols, and nitisols have little to no analytical data available on metal contents. A sensitivity analysis suggests that the most poorly constrained soil metal concentrations occur in the thick, old tropical soils of central Africa and the anthrosols of eastern China.  相似文献   

东天山土屋-延东大型、超大型斑岩铜矿田成矿条件探讨   总被引：1，自引：0，他引：1  

木合塔尔·买买提  桑树勋  木合塔尔·扎日  成斌 《新疆地质》2011,29(2):166-172

以东天山土屋-延东斑岩铜矿田为研究对象,在总结前人研究资料及进行针对性野外地质调查基础上,通过土屋-延东斑岩铜矿田成矿地质特征综合分析,对成矿构造背景、相关岩浆活动、围岩、成矿物质来源及成矿流体等进行探讨,获得初步认识.土屋-延东斑岩铜矿田主要形成于聚合板块活动时期陆缘构造岩浆活动带,与造山带汇聚阶段俯冲-碰撞作用有关...  相似文献   

龙湾套铜矿岩石学特征及矿床成因          下载免费PDF全文

王继芳  王娜  黄坤朋  唐洪敏  徐然  王志亮 《山东国土资源》2015,31(4)

泗水县龙湾套地区发育大面积新太古代角闪辉长岩,为在该区寻找赋存在角闪辉长岩中的岩浆熔离型铜矿床,曾开展过普查工作,最终发现了一小型铜矿床。探讨该区角闪辉长岩岩石学特征,对在该区进一步寻找同类型铜矿床有重要意义。  相似文献   

沂水县高庄地区铜铅矿地质特征及成矿模式探讨          下载免费PDF全文

亓希强  张晶  郭加朋  刘鹏磊  徐东来  肖丙建 《山东国土资源》2015,31(9)

沂水县高庄铜铅矿赋存于张夏组盘车沟段灰绿色页岩夹薄层泥灰岩和张夏组下灰岩段鲕粒灰岩之间的构造角砾岩中,在形态上和空间位置上严格受蚀变角砾岩带控制的似层状矿体。通过对矿区内地层、控矿构造、矿体特征和矿石质量的分析论述,认为该矿床为碳酸盐型中低温热液充填—交代矿床,并建立了成矿模式。  相似文献   

A Study of the Thermodynamics and Kinetics of Copper Adsorption Using Chemically Modified Rice Husk     

Hasanur Jaman  Debarati Chakraborty  Papita Saha 《洁净——土壤、空气、水》2009,37(9):704-711

The use of rice husk as a low cost adsorbent for the removal of copper from wastewater has been explored in a laboratory scale experiment. The rice husk used for the study was treated with alkali to increase the sorption properties. The influence of metal ion concentration, weight of biosorbent, stirring rates, temperature and pH were also evaluated, and the results are fitted using adsorption isotherm models. From the experimental results it was observed that almost 90–98% of the copper could be removed using treated rice husk. The Langmuir adsorption isotherm, Freundlich isotherm and Tempkin isotherm models were used to describe the distribution of copper between the liquid and solid phases in batch studies, and it was observed that the Langmuir isotherm better represented the adsorption phenomenon. The experimental rate constant, activation energy, Gibbs free energy, enthalpy and entropy of the reaction were calculated in order to determine the mechanism of the sorption process.  相似文献