检索结果-南通市图书馆

Typomorpic Characteristics of the Major Minerals in the Puziwan gold Deposit,Datong,Shanxi,China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2008年第4期82卷 781-787页

作者： QING Min NIU Cuiyi LEI Shibin gold Geological Institute of Chinese Army Police Force Langfang Hebei 065000 Zhongjin gold corporation Limited Beijing 100011 gold Headquarters of Chinese Army Police Force Beijing 100010

Utilizing theories of minerageny and prospecting mineralogy, the authors studied the attitude, morphotype and chemical composition of metallic minerals of pyrite, gold, chalcopyrite, galena and sphalerite, non-metallic minerals of quartz, carbonate, dolomite and rutile in the Puziwan gold deposit. The study shows the following results. （1） The mineral assemblage is complex and the species of sulfide are abundant with occurrences of sulfosalt minerals. （2） The composition in the minerals is complex and there rich micro elements, including As, Sb, Bi, Se, Te, Au, Ag, Cu, Pb, Zn, and Cr, Ni, V. The typomorphic characteristics of the association of the elements and their specific value suggest that gold mineralization is associated with shallow magmatic hydrothermal activity, the oreforming fluid is the mixture of abundant rising alkali magmatic water originating from the mantle or the lower crust and the descending acid atmospheric water. （3） Ankerite, Fe-rich sphalerite, granular Ti-rich rutile are widely distributed, which indicate great denudation depths, high mineralization temperature. The deposit is found in the middle and shallow positions of the porphyry series. The deep layers are not favorable for gold mineralization. （4） Copper minerals are rich in the ores and sulfides have high content of copper, suggesting possible porphyry-type Cu （Au） mineralization in deep positions and the surrounding areas.

关键词： typomorphic characteristics of minerals cryptoexplosive breccia-hosted gold deposit,Puziwan Yanggao of Shanxi

Effect of chloride ion on bacterial pre-oxidation of arsenic-containing gold concentrate

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2011年第5期18卷 1418-1424页

作者：杨玮覃文庆刘瑞强任允超 School of Resources Processing and Bioengineering Central South University Refinery of Shandong gold Mining Co. Ltd. Engineering Design and Research Co. Ltd.Shandong Gold Corporation

The bacterial pre-oxidation process of arsenic-containing gold concentrates and the bacterial activity under different chloride ion concentrations were studied by using a mixture of thermophilic strains TCJ domesticated in *** experimental result shows that with different samples and leaching systems,the adaptability and Cl- tolerance of bacteria are different,and that appropriate chloride ion concentration is conductive to bacterial oxidation,while higher chloride ion concentration will inhibit the bacterial activity and affect the pre-oxidation *** the present production conditions,TCJ can adapt to the changes of water quality in the source of water and its critical chloride ion tolerance value is 2.7 g/L.

关键词： chloride ions arsenic-containing gold concentrate pre-oxidation bacterial adaptation critical concentration

Geochemical CompGeochemical Comparison of Fresh and Weathered Tailings from the Sabodala gold Mine Kedougou Region, Senegal Following 6 Years of Operationarison of Fresh and Weathered Tailings from the Sabodala gold Mine Kedougou Region, Senegal Following 6 Years of Operation

在线全文

学校读者我要写书评

暂无评论

Journal of Geoscience and Environment Protection 2020年第7期8卷 177-194页

作者： Ibrahima Dia Mababa Diagne Mamadou Gueye Andrew Barnes Christian Mace Earth Sciences Institute Cheikh Anta Diop University Dakar Senegal Geochemic Ltd. Monmouthshire United Kingdom teranga gold corporation Toronto Canada

The Sabodala gold mine is located in the Kedegou region in eastern Senegal near the border with Mali in a tropical Savannah climate zone with distinct wet and dry seasons. The mine has been operating since 2009 with active tailings deposition giving an ideal opportunity to study the weathering characteristics of carbonate rich tailings materials under real world conditions. The mine is operated in accordance with international best practice with regular monitoring of water quality and tailings chemistry in accordance with the international cyanide management code (ICMC) and also in order to monitor and control any potential impacts from Acid Rock Drainage and Metal Leaching (ARDML) that may be generated from the tailings materials and waste rock. In 2015 as part of a project looking at the potential for re-use of generated tailings as construction materials, a number of additional geochemical tests including whole rock assays, mineralogy, Acid Base Accounting in accordance with modified Sobek method with siderite correction, together with paste pH and electrical conductivity (Ec) measurements were undertaken. The purpose of the study was to update the predictions of the potential for ARDML generation and drainage pH in leachates forming from the Sabodala tailings. The tests were run on one composite weathered and 3 selective fresh samples collected by auger drilling on three holes over the tailing. Results have enabled a better understanding of the chemical weathering characteristics of finely ground tailings materials under tropical weathering conditions and the nature of secondary minerals precipitated.

关键词： Acid Base Accounting Neutralization Potential Elemental Analysis Mineralogy

Fluids double-fracturing genetic mechanism and mineralization of gold-copper of the breccia pipe at Qibaoshan in Shandong Province

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2000年第2期43卷 113-121页

作者：徐兴旺蔡新平秦大军王杰梁光河张小允刘立金 1. Institute of Geology and Geophysics Chinese Academy of Sciences 100029 Beijing China 2. Qibaoshan gold corporation Shandong Province 262321 Wuliang China

After studying the characteristics and special texture of the fluidogenous tectonics, mineral assemblage in the cemented vein between breccia and their special distribution, and stress analyzing the joint structures in and around the breccia pipe, it is found that the observed phenomena are caused by a new tectonic dynamic mechanics of fluid——double-fracturing caused bytemperature and pressure of fluids and pulsating expansion. Under the actions of thermal stress and the pressure of fluids, thermal cracks and joints that developed along parts of the thermal cracks formed systematically in the rocks. Under these conditions, up-arching fracture zones that pulsatively expanded upward and cylindrical pressing breccia body were formed. Rocks at the peak of the pyramidal fractures zone break down instantly. Where the difference between pressure of fluids and the overburden pressure exceeded greatly the competence of the rocks, fluid junctions occurred and the velocity of the fluid flow increased as a result. Explosive body expanded upward in the shape of an inverse cone, cone-like explosive breccia body and cover-like shattering breccia body located on the upper part of the breccia pipe were ultimately formed. gold-rich fluids were enriched and mineralized near the boiling surface in the lower part of the inverse cone-like explosive breccia body where temperature and pressure decreased rapidly, while copper-rich fluids were enriched and mineralized in the junction area where temperature and pressure were relatively high.

关键词： breccia pipe double-fracturing of fluids genetic mechanism mineralization of gold-copper deposit Qi-baoshan.

Passive behavior of gold in sulfuric acid medium

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2015年第6期25卷 2037-2046页

作者：张伟 Ahmet Deniz BAS Edward GHALI Yeonuk CHOI Department of Mining Metallurgical and Materials EngineeringLaval University Barrick gold corporation

Anodic behavior of pure Au as compared to platinum （Pt） in H2SO4 solutions was considered by different electrochemical techniques for an appropriate insight. Cyclic voltammetry studies showed two oxidation and one film reduction peaks for Au, while one oxygen evolution reaction for Pt. Increasing H2804 concentration （from 0.5 to 1 mol/L） caused 2-fold increases in peak current density of Au. Increase in agitation promoted passive zone of Au, while it was negligible for Pt by potentiodynamic studies. Potentiostatic studies （2 h） at three anodic passive potentials in 1 mol/L H2SO4 showed that the admittance of Au was found to be the lowest at 1.4 V. Electrochemical noise measurements during the decay periods （16 h） after polarization showed that the thin passive film formed during potentiostatic polarization has been dissolved.

关键词： gold passivation sulfuric acid electrochemical noise

New Approach of Structural Setting of gold Deposits in Birimian Volcanic Belt in West African Craton: The Example of the Sabodala gold Deposit, SE Senegal

在线全文

学校读者我要写书评

暂无评论

International Journal of Geosciences 2016年第3期7卷 440-458页

作者： Serigne Sylla Mamadou Gueye Papa Malick Ngom teranga gold corporation Dakar Senegal Institute of Earth Sciences Université Cheikh Anta Diop Dakar Senegal Département de Géologie Faculty of Sciences and Technics Université Cheikh Anta Diop Dakar Senegal

The Sabodala gold deposit in the Mako volcanic Belt (SE-Senegal, West African Craton) occurs in mafic and ultramafic rocks overlain by clastic sedimentary rocks and felsic volcanic-volcaniclastic sequences. It is a structurally controlled mesothermal vein gold deposit developed in deformed rocks units near the Falombo pluton. The Sabodala goldfield comprises several faults systems striking N-S to NE-SW. New structural evolution consisting of both thrusting and transcurrent events has been defined for the Sabodala goldfield. The majority of the gold at Sabodala occurs on the western flank of a large, doubling plunging dome (the Sabodala Antiform) and is also associated with sinistral wrenching that overprints early structures within the Sabodala Mine. The gold bearing veins are hosted by flat lying and NW-trending shear zones. The NW-trending faults acted as transfers syn-gold mineralization, although only discrete segments of these faults were active during the main stage of gold mineralization. Late exhumation resulted in extension along fault zones was responsible for the juxtaposition of medium and low grade metamorphic rocks. The granitic suite of the Falombo pluton is linked to exhumation. Final dextral transpression postdating exhumation produced shearing and folding. gold lodes developed during brittle deformation are associated with high fluid pressures in a northwest-southeast shortening regime. These are termed mainly the Sabodala deposit, and secondary the Niakafiri and Masato deposits.

关键词： gold Mesothermal Thrusting Transcurrent Sabodala Birrimian Senegal West Africa

Calculation of stratum surface principal curvature based on a moving least square method

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2008年第1期18卷 59-63页

作者： LI Guo-qing MENG Zhao-ping MA Feng-shan ZHAO Hai-jun DING De-min LIU Qin WANG Cheng Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China School of Mmeral Resources and Safety Engmeertng China University of Mining ＆ Tecl~nology BeOing 100083 China Sanshandao gold Mine Shandong Gold Group Corporation Limited Laizhou Shandong 261442 China

With the east section of the Changji sag Zhunger Basin as a case study, both a principal curvature method and a moving least square method are elaborated. The moving least square method is introduced, for the first time, to fit a stratum surface. The results show that, using the same-degree base function, compared with a traditional least square method, the moving least square method can produce lower fitting errors, the fitting surface can describe the morphological characteristics of stratum surfaces more accurately and the principal curvature values vary within a wide range and may be more suitable for the prediction of the distribution of structural fractures. The moving least square method could be useful in curved surface fitting and stratum curvature analysis.

关键词： principal curvatures moving least square method surface fitting structural fractures

Calculation and Management for Mining Loss and Dilution under 3D Visualization Technical Condition

在线全文

学校读者我要写书评

暂无评论

Journal of Software Engineering and Applications 2011年第5期4卷 329-334页

作者： Weijing Wang Shaofeng Huang Xiaobo Wu Qingfei Ma University of Science & Technology China National gold Group corporation

The mining loss rate and dilution rate are the key indicators for the mining technology and management level of mining enterprises. Aiming at the practical problems such as the large workload but inaccurate data of the traditional loss and dilution calculation method, this thesis introduces the operating principle and process of calculating the loss rate and dilution rate at the mining fields by adopting geological models. As an example, authors establishes 3D models of orebody units in the exhausted area and mining fields in Yangshu gold Mine in Liaoning Province, and conduct Boolean calculation among the models to obtain the calculation parameters of loss and dilution, and thereby calculate out the dilution rate and loss rate of the mining fields more quickly and accurately.

关键词： Calculation and Management Mining Loss and Dilution 3D Visualization Introduction

Paleogene Tectonic Evolution Controls on Sequence Stratigraphic Patterns in the Central Part of Deepwater Area of Qiongdongnan Basin, Northern South China Sea

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2014年第2期25卷 275-288页

作者： Guangzeng Song Hua Wang Huajun Gan Zhipeng Sun Xiaolong Liu Meng Xu Jinfeng Ren Ming Sun Di Sun Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences Faculty of Earth Resources China University of Geosciences Research Institute of China National Offshore Oil corporation Ltd.-Zhanjiang Research Institute of China National Offshore Oil corporation Ltd. Shandong Province Experimental Institute of Geological Sciences Key Laboratory of Gold Mineralization Process and Resources Utilization Ministry of Land and Resources Petroleum Development Centre Shengli Oilfield Company SINOPEC

In active rift basins, tectonism is extremely important for sequence stratigraphic patterns, affecting both the sequence architecture and internal makeup. Sequence stratigraphic framework of a Paleogene rift succession in Qiongdongnan Basin, northern South China Sea, was built using seismic profiles, complemented by well logs and cores. One first-order and three second-order sequences were identified on the basis of basin-scale unconformities, and seven third-order sequences are defined by unconformities along the basin margins and correlative conformities within the central basin. Through unconformity analysis and backstripping procedure, the Paleogene synrift tectonic evolution of deep- water area of Qiongdongnan Basin was proved to be episodic, which can be divided into rifting stage-I, rifting stage-II and rifting stage-III. Episodic rifting resulted in the formation of various types of struc- tural slope break belts, which controlled different architectures and internal makeup of sequences. This study enhances the understanding of the control of tectonic evolution on sequence stratigraphic pat- terns and establishes relevant patterns in a typical rift basin, and further proposes the favorable sand- stone reservoirs developing in different sequence stratigraphic patterns, which will be pretty helpful for subtle pool exploration in deepwater area of petroliferous basins.

关键词： South China Sea deepwater area tectonic evolution structural slope break belt se-quence stratigraphic pattern.