Characteristics of Lead and Zinc Polymetallic Deposit and Wall Rock Alteration Zoning in Luziyuan, Yunnan

2013 ◽  
Vol 734-737 ◽  
pp. 52-55
Author(s):  
Lei Zeng ◽  
Ming Guo Deng ◽  
Chang Liang Lv ◽  
Wei Liu
Keyword(s):  
Wall Rock ◽  
Geological Investigation ◽  
Polymetallic Deposit ◽  
Ore Body ◽  
Lead And Zinc ◽  
Alteration Zoning ◽  
Ore Mineralization ◽  
Wall Rock Alteration ◽  
Lead Zinc ◽  
Rock Alteration

The lead and zinc polymetallic deposit in LuziYuan is an ultra-large type skarn deposit. The ore body originated from the interlayer crushed zone between the second and thrid section of stratum marble and slate (schist) interbedding of upper Cambrian series Shahechang group, the wall rock alteration is intensice in the diggings, and the alteration zoning is obvious. Through field geological investigation and data analysis, based on the petrography of alterated rocks and combined with catalog information of drilling, the wall rock alteration in the diggings of LuziYuan is divided into four alteration zones,which are in sequence: carbonate-quartz-chloritization zone; carbonate-quartz-skarn lithification zone; skarn-lead zinc ore mineralization zone; and skarn-pyritization zone. The forming of ore body is related to alterations such as skarn lithification, silicification, marmarization, magnetite, etc.

A Study of Ore-Controlling Factors and Metallogenic Mechanism of Lead-Zinc Deposit in Luziyuan, Zhenkang, Yunnan

2013 ◽  
Vol 734-737 ◽  
pp. 26-31
Author(s):  
Chang Liang Lv ◽  
Ming Guo Deng ◽  
Lei Zeng
Keyword(s):  
Wall Rock ◽  
Medium Temperature ◽  
Polymetallic Deposit ◽  
Geological Features ◽  
Wall Rock Alteration ◽  
Metallogenic Mechanism ◽  
Lead Zinc ◽  
Two Stages ◽  
Rock Alteration ◽  
Hydrothermal Activities

The lead-zinc ore in Luziyuan, Zhenkang Town, Yunnan Province is a large lead-zinc polymetallic deposit discovered in recent years. The ore body mainly occurs in the stratum of Shahechang Group of Upper Cambrian. Controlled by NE trending faults and its flanking associated structures, it features equal interval and lateral trending distribution in the spatial domain. The development and mineralization of wall-rock alteration experienced two stages, low medium temperature stage and medium-high temperature stage. Metallogenic materials are mainly from the ore-bearing stratum and deep concealed rock mass. Through the study of such geological features as lithology of ore-bearing stratum, structure of ore-controlling Faults, wall-rock alteration, and ore fabrics, the author believes that the formation of the deposit is closely related to the multi stages of tectonic movements and magmatic hydrothermal activities. It is a sedimentary-reworked type, and skarn-type lead-zinc-iron polymetallic deposit and it is of multiple mineralization stages and varieties of mineral sources.

Geological Characteristics and Prospecting Criteria of Sanbao Silver Polymetallic Ore Deposit in Malipo Cuntry of Yunnan Province

2013 ◽  
Vol 868 ◽  
pp. 88-91
Author(s):  
Jian She Wang ◽  
Yong Feng Yan ◽  
Dong Wang ◽  
Peng Yu Feng
Keyword(s):  
Low Temperature ◽  
Yunnan Province ◽  
Wall Rock ◽  
Ore Genesis ◽  
Ore Deposit ◽  
Geological Characteristics ◽  
Polymetallic Deposit ◽  
Wall Rock Alteration ◽  
Rock Alteration ◽  
Polymetallic Ore

Sanbao silver polymetallic deposit is overally located in the front of "North convex" in Laojun Mountain granite body, belonging to polymetallic deposit of stratabounded medium-low temperature hydrothermal reformation genesis. It has been found that six mineralized belt, having developed the wall-rock alteration. The prospecting criterion is determined by ore genesis and ore-controlling factor.

scholarly journals Spectral Alteration Zonation Based on Close Range HySpex-320 m Imaging Spectroscopy: A Case Study in the Gongchangling High-Grade Iron Ore Deposit, Liaoning Province, NE China

2020 ◽  
Vol 10 (23) ◽  
pp. 8369
Author(s):  
Kun Song ◽  
Ende Wang ◽  
Yuzeng Yao ◽  
Jianfei Fu ◽  
Dahai Hao ◽  
...  
Keyword(s):  
Iron Ore ◽  
Spectral Characteristics ◽  
Wall Rock ◽  
Iron Deposit ◽  
Spectral Features ◽  
High Grade ◽  
Rock Interaction ◽  
Ore Body ◽  
Wall Rock Alteration ◽  
Rock Alteration

Research on wall rock alteration is of great importance to the understanding and exploration of ore deposits. The microscopic changes of the same mineral in different alteration zones can provide information about the migration and enrichment of ore-forming elements. In this paper, a typical profile of a high-grade iron ore body in Gongchangling iron deposit was investigated and sampled. The samples were checked by polarized microscopy, and alterations zonation were delineated according to the hydrothermal mineral assemblages and paragenesis. Moreover, hyperspectral images of wall rocks from each alteration zone were obtained by Norsk Elektro Optikk (NEO) HySpex-320 m imaging system. A customer Interactive Data Language (IDL) software package was used to process the images, and spectral features were extracted from the selected samples. The results indicate that spectral characteristics manifest obviously regular variations; i.e., from proximal to distal for the high-grade iron ore body, the wavelengths at ca. 1200 nm of chlorite and garnet, which accounts for most of the hydrothermal alteration minerals, become longer, and the absorption depths gradually smaller. The spectral features at 1200 nm of chlorite and garnet are always caused by the crystal field effect of Fe2+; therefore, the wavelength variations indicate the increase of Fe2+ and a reduced environment, which can provide more detailed information about the metallogeny and water–rock interaction. Since the hyperspectral features of the altered rocks can disclose unique mineralogical and structural information, the conventional classification of alteration zonation should be combined with the spectral feature, i.e., spectral alteration zonation, which is of great help to the understanding of the forming conditions of wall rock alteration and also the high-grade iron ore bodies.

Quantitative Study of Elements Migration during the Wall Rock Alteration Process for Gejiu Copper-Polymetallic Deposit inside Rock

2012 ◽  
Vol 260-261 ◽  
pp. 1138-1144
Author(s):  
Xiao Hu Deng ◽  
Shou Yu Chen ◽  
Shi Li Liao
Keyword(s):  
Wall Rock ◽  
Metallic Elements ◽  
Comprehensive Utilization ◽  
Polymetallic Deposit ◽  
Original Rock ◽  
Wall Rock Alteration ◽  
New Type ◽  
Important Sign ◽  
Ore Prospecting ◽  
Rock Alteration

With continuous consumption of proven resources, people have to turn to new resources or find new ways for prospecting. As to Yunnan Gejiu Tin and copper polymetallic deposit, deep ore prospecting may be the solution. The newly discovered copper-polymetallic deposit inside the rock of Tangzi’ao depression zone, which located in western part of Yunnan Gejiu east tin mine area, is a new type of deposit in deep ore prospecting. This kind of deposit produced in the alkali-rich, oxidizing environment, potash feldspathization is an important sign of prospecting, and a variety of metallic elements can be comprehensive utilization. It is special that potash feldspathization zone and epidotization zone alternating with each other; the phenomenon may caused by multi-period of hydrothermal fluids. By quantitative calculating the results of altered rocks and original rock samples, the author find out the migration laws of the constant elements and the main ore-forming elements and their associated elements, which provide a basis for prospecting in the future.

Ore Mineralogy of the Louvem Copper Deposit Val d'Or, Quebec

1972 ◽  
Vol 9 (12) ◽  
pp. 1596-1611 ◽  
Author(s):  
Jayanta Guha ◽  
Richard Darling
Keyword(s):  
Copper Deposit ◽  
Wall Rock ◽  
Textural Features ◽  
Ore Deposit ◽  
Ore Body ◽  
Ore Minerals ◽  
Wall Rock Alteration ◽  
Ore Mineralogy ◽  
Rock Alteration ◽  
Host Rocks

Microscopic study of samples from the Louvem copper deposit shows that the principal ore minerals are pyrite, chalcopyrite, and sphalerite and the accessory ore minerals are rutile, tetradymite, two unidentified tellurides, cobaltite, molybdenite, galena, and four optically distinct phases having compositions along the digenite–bornite tie line.The Louvem ore body is a pipe-shaped mass of mineralized rhyolitic tuff and agglomerate that is conformable with enclosing volcanic and pyroclastic rocks. The ore body is zoned, with a copper-rich core and pyrite-rich margins. Wall-rock alteration spatially related to the ore deposit suggests that it was formed by replacement of porous tuffaceous host rocks by a hydrothermal fluid. Textural features of the ore indicate that it was subjected to post-emplacement thermal metamorphism.

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