Scientific basis of topic selection
1 research purpose and significance
(1) Research purposes:
① Carry out systematic trench engineering control on the surface of discovered gold ore bodies, and carry out drilling engineering verification in the deep part to expand the scale of ore bodies.
(2) Expose and verify the sediment anomaly of1/50,000 drainage system, roughly understand the metallogenic geological conditions and ore-controlling factors in the abnormal area, and look for new ore bodies.
(2) Significance:
The * * * * gold deposit is a large-scale gold deposit of time pulse type newly discovered by the team of the Bureau of Nonferrous Geological Exploration of * * Province in recent years in the dynamic Kunlun polymetallic metallogenic belt. Through exploration in recent years, the scale of the deposit has been expanding, and the Provincial Department of Land and Resources has listed it as a mineral land that can be developed on a large scale in the Eleventh Five-Year Plan.
* * The team of Non-ferrous Geological Exploration Bureau carried out comprehensive anomaly verification, geological and mineral investigation and inspection of major mines (strata) in the gold, silver and cobalt gully system soil in this area, and achieved remarkable results and found a number of deposits.
On the whole, the geological exploration of the * * * * deposit has basically reached the general survey level, and the engineering control of the first mining area has also reached a high level. This time, based on the practice of my tutor and the No.8 Team of Qinghai Nonferrous Geological Exploration Bureau, I fully collected and sorted out the previous data, and compiled "Study on the Metallogenic Regularity of * * Gold Mine in dulan county" to study the genesis and ore-controlling regularity of this gold mine, and summarized the metallogenic model by referring to similar deposits nearby, which is not only conducive to understanding * *.
2. The research content belongs to the field and scope.
The content belongs to the field of natural science, and the research scope is mineral deposit science. Based on the field geological survey and indoor comprehensive research, through the study of typical mineral deposits, combined with new metallogenic theory and exploration method, using plate tectonic theory, metallogenic system theory and regional metallogenic theory, adhering to the principle of point-by-point analysis and point-to-area analysis, using test data and comparing the previous research results, the geochemical characteristics, metallogenic regularity and genesis of mineral deposits are studied.
3 Current research status, level and development trend at home and abroad
1969- 197 1 year, * * Geological Bureau carried out1:200,000 in East Kunlun metallogenic area.
The regional geological survey is1:500,000 aeromagnetic survey, and the geological work of deposits and occurrences in the area has been done to varying degrees, and the metallogenic geological background in the area has been preliminarily understood.
1973 submitted the regional investigation report of "Jia Luhe Sheet";
1989 to 1990, the geochemical exploration team of * * Provincial Bureau of Geology and Mineral Resources systematically carried out1:500,000 low-density dispersed flow scanning in East Kunlun area, and the results involved in this area have not been made public;
1999, * * Nonferrous Geophysical and Geochemical Exploration Company carried out 1500kmZ river system sediment survey in Guli area (Weiri-Rou and Zaoguori area), and delineated the comprehensive.
Exception 26
In 200 1 year, the team of the Bureau of Non-ferrous Geological Exploration of * * * * gold, arsenic, silver and carbon were beaten, and the * * * gold deposit was found when verifying the comprehensive anomaly of the upper soil of the gully system.
In recent years, the * * colored geological team has conducted anomaly verification in the * * area for the gold special project and provincial local geological prospecting projects. Through the control of different types of projects carried out in many veins in this area, we have a certain understanding of the thickness, occurrence and grade of ore bodies in this area, and have mastered some basic laws of ore body occurrence. At the same time, it is found that the ores with industrial value in this area are not limited to the time-dependent ores, but all the altered diorite, phyllite, chlorite phyllite and pyritized carbonaceous phyllite contain ores, and some of them can also constitute industrial ore bodies.
In the analysis and summary of ore-controlling and ore-bearing structural laws in mining areas, there are also new understandings. It is found that the ore body is not only confined to the east-west structural belt, but also the secondary fault (near north-south direction) of the northwest, northwest and east-west faults is one of the ore-bearing structures.
Based on the analysis of the geological conditions, geological characteristics and metallogenic mechanism of the deposit, it is considered that the ore-forming materials are mainly provided by hot water sedimentary formations formed in the early stage, and then enriched with integrated minerals under the action of dynamic compression and deformation and metamorphism in the later stage, forming gold-bearing quartz vein type and structural altered rock type, which has typical characteristics of ductile shear zone type gold deposits.
The * * * survey is located in the east of the East Kunlun metallogenic belt, about 10km northwest of the * * * gold mine, and there are many large and small mines such as * * gold mine and * * gold mine around it. It is an important gold enrichment area in the eastern part of East Kunlun.
1:50,000,1:25,000 water system sediment anomalies and 1: 1 soil anomalies indicate that the prospecting prospects in this area are broad. Many gold ore bodies found in the previous anomaly inspection work are located at the edge of the anomaly area, and the main anomaly area is covered by thick Quaternary slope deposits, which cannot be systematically verified due to the limitation of workload. In 2008, 1:25000 river sediment survey and 1: 1 soil survey are very consistent with the existing gold ore bodies, and the anomalies show good prospecting prospects. After examining the S-2 anomaly of sediments in 1:25000 drainage system, it is found that Auⅰ and Auⅱ ore belts have become. Judging from the distribution characteristics of water system anomalies and soil anomalies, there is a large prospecting space.
Judging from the current work level, five ore groups, 10 gold bodies,/kloc-0 gold-bearing altered rock belts and/kloc-0 gold-mineralized altered rock belts found in * * area are only controlled on the surface and in the shallow part of a few areas, and the control degree is very low. In 2007, when the exploration project of Ⅱ gold tunnel was preliminarily verified, the ore body extended to the deep and was relatively stable. In 2008, the main ore body was controlled by surface tracking, and the ore body also extended in the strike, indicating that it has good prospecting potential on the surface and deep in the main mining area. The above geological phenomena show that the Yinage area has a large prospecting space and good prospects, and has the potential to form medium and large gold deposits.
The main contents of the study and the key problems to be solved
(1) research content
Combined with the needs of the research, the main research contents are as follows:
1. Select a section that runs through the bottom of Goloinnage area for field measurement, and collect a group of representative samples for analysis, which can be used to determine the controversial stratigraphic age of the mining area.
2. Make detailed geological observation on the existing tunnels, exploratory trenches and drilled cores in Guoluoyinnage and its surrounding crazy spots, and take photos and collect samples; Focus on the analysis of metallogenic regularity of small structures, find out the mechanical properties and filling characteristics of their activity sequence and their relationship with strata, rock mass and other structures; study the extension and lateral laws of ore bodies, including the changes of ore body shape, occurrence and thickness in strike, dip and extension direction, the changes and reappearance of veins and ore bodies, and the influence of ore-controlling structures on ore body characteristics. ; Study the law of mineralization enrichment, mainly study the changing trend and controlling factors of grade, including mineralization types and veins.
3. Through the comprehensive analysis of the samples collected in the mining area, such as rock and mineral geology and geochemistry, trace element geochemistry and rare earth element geochemistry, the element combination and enrichment law in this area are found out: the tectonic background, ore-forming material source, ore-forming mechanism and ore-forming age of mineralization are analyzed by combining fluid inclusions and stable isotopes.
4. On the basis of predecessors' data, according to the geological characteristics of some deposits in the periphery of Nage deposit, compare Baguoluo with other deposits in the whole East Kunlun orogenic belt, summarize the genesis of the deposit, analyze the metallogenic regularity and establish the metallogenic model.
(2) Key problems to be solved
① The degree of geological work in * * * area is relatively low. At present, only1:50,000 and1:25,000 stream sediments have been measured in the work area, while1:25,000 gully system secondary halo measurement and 1: 1 10,000 soil measurement are small, and the main anomalies are not completely controlled. Therefore, it is necessary to strengthen the basic work in this area, extract more prospecting information and expand the prospecting scope.
(2) Through the geological work in recent years, although good results have been achieved in this area, due to the workload and degree of work, there is insufficient understanding of the ore source, ore-controlling factors, prospecting indicators, ore body occurrence space and prospecting prospects in this area, mainly as follows:
The geological work in * * area is mainly geological survey and a small number of prospecting projects. Due to the structural development and strong alteration in the area, and the distribution of rock-controlling and ore-controlling structural fault zones, it is not yet possible to determine the evaluation of structural ore-controlling degree according to the structural properties, alteration characteristics and output background of faults.
At present, the engineering control degree of ore bodies in this area is very low, and the level of geological research is even lower. According to its metallogenic characteristics and prospecting rules, the gold deposit model of Guoluolongwa is applied. Because of the objective differences between them, there are great limitations in guiding the prospecting in this area.
(3) Quaternary eluvial deposits and scour proluvial are well developed and the overburden is thick. Therefore, the engineering control of discovered gold bodies is limited, and their occurrence, scale, shape, grade and their changes are not well understood. The surface control and shallow and deep changes of gold ore bodies are not enough, so the tracking control should be strengthened.
④ The * * * area borders Asha Gold Mine in the north and the * * * mining area in the south, so the regional metallogenic geological background is extremely important. The prospecting information mastered by basic work and the continuous discovery of gold bodies confirm that this area has good metallogenic conditions and prospecting potential. It has become an urgent task for geological exploration to increase investment in geological exploration, apply new theories, methods and technologies, find breakthroughs and expand resources in this area.
3. Research methods and technical routes
1 research method to be adopted
(1), 1: 1 10,000 geological survey
(2) Sediment investigation in 1:25000 water system
(3) 1: 10000 soil survey
(4),1:2000 rock profile
(5), pipe trench engineering
(6) Drilling
2 technical route, technical measures and key technologies
(1), 1: 1 0,000 geological sketch mainly adopts the crossing method, supplemented by the tracing method, and tracks important geological bodies such as ore-bearing beds, mineralized alteration zones, structures and contact zones along the strike, grasps their features such as shape, occurrence and scale, collects chemical samples, and quickly analyzes the samples to understand their ore-bearing properties.
Geological point description mainly highlights key and meaningful geological features, including lithologic name, structure, mineral composition, mineralization alteration, rock occurrence, samples and specimens, etc. And sketch and photograph meaningful geological bodies.
Technical key: After the geological survey every day, there is a route geological summary, which summarizes the geological work of the day and deepens the understanding of prospecting in this area.
(2) 1:25000 The main flow of sediment survey in water system is: base map-field work-sample processing-self-inspection and mutual inspection-data processing and abnormal map compilation-indoor data collation.
Technical points: The work shall be carried out in strict accordance with the geological exploration standards of * * province and the detailed rules for sediment investigation of * * province1/50,000 water system.
(3) In the 1: 1000 soil survey, the quality of field work and sample treatment was truly and reliably analyzed, and abnormal maps were compiled according to the data.
Technical key: The work shall be carried out in strict accordance with the requirements of China people * * * and the national geological and mineral industry standard GZ/T0 145-94, Soil Geochemical Survey Standard 1:50000 and Design Book.
(4) 1:2000 rock profile is mainly distributed in 1: 50000 and 1: 25000 water system sediment survey anomaly concentration areas, and now the geochemical profile is 2Km.
Technical points: This work is carried out in accordance with People's Republic of China (PRC) * * and the national geological and mineral industry standard DZ/T001-91Specification for Geochemical Survey.
(5) The trench project is mainly arranged in the abnormal areas of river sediment survey of1:50,000 and1:25,000, and the main metallogenic belt in the geological survey area.
Technical key: the starting point of each logging trench project is marked with wooden stakes, and the chemical sample collection point is marked with red paint. The quality of engineering geological logging and map cleaning of the exploratory trench meets the requirements of the specification.
(6) According to the design requirements, drill holes are arranged on lines 0, 4, 7 and 15 of Au Ⅱ orebody.
Technical Key: The engineering quality requirements shall be strictly implemented in accordance with the "Six Indicators" in the Core Drilling Regulations and related specifications, and the quality shall meet the required standards.
4. Investigation and preparatory work
1. Collect past work data and regional geological data in this area.
2, the field equipment and tools for correction and maintenance (GPS correction, etc. )
5 expected results and specific academic or application value.
Expected result
In 2008, geological survey was carried out according to Nage area, and 1:25000 river sediment survey,1:kloc-0/:000 geological survey, 1:2000 geochemical profile,1:kloc-0/.
Application value
A theoretical understanding with strong guiding significance and effective working methods has been initially established, and the metallogenic conditions, ore-controlling factors, prospecting indicators and metallogenic laws in this area have been theoretically explored and studied, providing theoretical basis for the actual prospecting work in this area.
6. Schedule
In order to write the graduation thesis in pairs on time, the plan is as follows;
1, February 23, 2009-March 29, 2009: graduation internship survey.
April 20091—— April 2009 18: Translation, preparation and submission of research reports and opening reports in foreign languages.
3. From April 19, 2009 to May 1 9, 2009, rock and mineral identification and geological mapping were carried out.
4. From May 2, 2009 to May 20, 2009, I wrote the first draft of the thesis.
5. From May 20, 2009 to June 20, 2009, the thesis was reviewed, revised and defended.