Remote Sensing Geological Interpretation And Three-dimensional Model Metallogenic Prediction Of The Changchengling Antimony Lead-zinc Deposit, Hunan

This article is based on the subject 2 of the project "Demonstration of deep exploration technology for copper-tin polymetallic minerals in southern Hunan section of Qinhang metallogenic belt" subordinate to the national key research and development plan "Deep Earth Resources Exploration and Mining"-"Ore Control Structure System and Law of Deep Ore Occurrence" "Sub-topic 3"-"Gaolongshan-Dakuishang Polymetallic Exploration Area Ore Control Structure System and Deep Ore Occurrence Law" project based on the use of Landsat-7,Landsat-8,Worldview-? and Pleiades remote sensing data,The remote sensing geological interpretation is carried out in the Virtual GIS virtual three-dimensional landscape environment,and the geological and geochemical exploration data collected and sorted out and the field survey are used as verification,and the regional remote sensing geological interpretation,alteration information extraction and high-resolution geological interpretation of the mining area are performed.Based on the CAD plane data of the tunnel,a deep three-dimensional geological model of the Changchengling mining area was established.The remote sensing geological interpretation,three-dimensional geological model and comprehensive analysis of geological and geochemical prospecting data are used to delineate the prospecting area of the Changchengling mining area and deep.The following results have been achieved:(1)Interpret the regional geology of the Changchengling-Gaolongshan area to determine the regional tectonic pattern.It is believed that the "?"-shaped line-ring structure of the Changchengling is an important rock-controlling structure in this area.Geological interpretation of the high-resolution remote sensing images of the Changchengling mining area shows that F101 is the main ore-conducting structure of the mining area.(2)Quantitative statistics and analysis of the linear structure in the Changchengling-Gaolongshan area show that the linear structure orientation is most developed in the SN and EW directions,followed by the NE and NW directions.The areas with high linear structural density are the Changchengling-Pinghe and Dakuishang-Qianlishan areas.The NE trending linear structure develops in the Changchengling-Pinghe area;the NNE trending linear structure develops in the Dakui Shang-Qianlishan area.Quantitative statistics and analysis of the linear structure in the Changchengling mining area show that the linear structure NE30-40° is the most developed in the Changchengling area,followed by the near EW direction and the NW40° direction.It is known that the ore deposit is in the high value area of density and frequency,and the northern Chifengtang area has extremely high linear structure density and frequency.(3)Fractal statistics show that the NE and NW directions of the Changchengling-Gaolongshan area are complex and highly mobile,which is conducive to the formation of deposits.For the statistical fractal dimension values of the structural units in the Changchengling-Gaolongshan area,the structure of the Changchengling-Pinghe area is more complex.According to fractal statistics of the Changchengling area,the NE-direction linear structure has the largest value of fractal dimension,and the SN-direction?NW-direction is the second.According to the division of tectonic units and fractal statistics,the Chifengtang area has an excellent mineralization prospect.(4)The Crosta method is used to extract regional iron staining and hydroxyl alteration information.The alteration information is distributed near NE-trending faults,known deposits inside the Changchengling "?" structure,and the outer back-Fenghuang Mountain and Zhangjialiao Ring structure.It is known that the alteration extraction effect near the deposit is good,and the alteration is abnormally high in dense areas with linear structures.(5)Using 3Dmine software as the platform for 3D geological modeling of the mining area,DTM surface model,fault body model,rock body and ore body model were constructed.The three-dimensional geological model is superimposed with remote sensing images to establish a comprehensive three-dimensional model of the mining area,and analyze the geological structure of the mining area and the laws of controlling rock and ore.(6)Delineate the remote scenic area of Fenghuang Mountain(Level ?),Chifengtang(Level ?),Zhangjialiao(Level ?)and Changchengling,Fengchuiluodai,and the deep north of Yangjilong.