13 results about "Skarn" patented technology

The invention discloses a skarn type deposit three-dimensional metallogenic prediction method, system and equipment and a medium, and relates to the technical field of mineral exploration. The method comprises the following steps: collecting and sorting geological information of a to-be-studied area and a surrounding area; according to the collected information, performing gravity-magnetic three-dimensional physical property inversion and lithology mapping; carrying out gravity-magnetic three-dimensional comprehensive geological modeling by adopting a discrete body inversion method; on the basis of the constructed model, performing three-dimensional metallogenic favorable contrast prediction; constructing a three-dimensional mineralization comprehensive prediction model based on the mineralization favorable degree value; and carrying out target region delineation and verification by using the three-dimensional metallogenic comprehensive prediction model to complete three-dimensional metallogenic prediction under the support of regional gravity and magnetic data. The method has the advantages of wider prediction range, high prediction reliability and the like.

The invention relates to the technical field of iron ore detection, and discloses a deep coverage area skarn type iron-rich ore target detection method based on gravity and magnetic data. The method comprises the steps of collecting and preprocessing gravity and magnetic measurement data of a target area to obtain a standardized gravity and magnetic data set; based on the geological background of the analysis area, the structure and lithology distribution characteristics are extracted, and the metallogenic conditions are matched to screen the potential metallogenic target area. And performing multi-scale decomposition on the gravity and magnetic data of the target region, obtaining different depth level abnormal features, constructing a three-dimensional geologic structure model, and obtaining density and magnetic susceptibility distribution based on model inversion. Accordingly, the ore body is recognized, spatial distribution features are extracted, continuity and scale of the ore body are determined through spatial correlation analysis, and a final prediction result is output after geological constraint condition optimization is combined. The method is suitable for a complex environment with signal shielding and abnormal superposition in a deep coverage area, deep ore body information can be accurately captured, and a feasible path is provided for skarn type rich iron ore detection.

The invention discloses a skarn tin ore exploration method and system, and is applied to the technical field of tin ore exploration. Comprising the following steps: collecting geologic feature data and tin ore distribution data of a mined skarn type tin ore area, and constructing a tin ore exploration database; training a metallogenic prediction model; dividing a to-be-explored mining area into a plurality of sub-areas, collecting geologic feature data of each sub-area, and inputting the geologic feature data into the metallogenic prediction model for prediction; a key exploration sub-region is judged according to the prediction result, and the tin ore distribution condition is explored in the key exploration sub-region in a physical exploration mode; and establishing a three-dimensional physical model based on the geological feature data of the to-be-explored mining area, and synchronizing the tin ore distribution condition to the three-dimensional physical model of the to-be-explored mining area. According to the method, the key exploration sub-region is predicted through the metallogenic prediction model, the accuracy of the prediction result can be improved, the exploration cost is reduced, and a reference is provided for skarn type tin ore exploration.

The invention discloses a skarn deep mineralized zone positioning method, which comprises the steps of generating a contact zone working area and a unique grid reference based on a contact zone geological boundary, a structure line and a common coverage range; based on the hyperspectral data, generating an oxidation thickness map and a demagnetization clue initial map; based on the oxidation thickness map and the demagnetization clue initial map, introducing a physical constraint of near-surface demagnetization caused by strong oxidation, and outputting a demagnetization risk map; constructing a depth bias function according to the demagnetization risk map, and generating joint inversion configuration; carrying out gravity-magnetic joint inversion according to the joint inversion configuration, outputting a density body and a magnetic susceptibility body, and carrying out pairing marking; the continuity of the deep preferential mineralization zone is checked, consistency verification is carried out, and preferential zone labels and low-priority zone labels are output; and the pairing marks, the priority belt marks and the low-priority belt marks are overlapped to form a hole arrangement reference graph, and suggested drilling positions and depth intervals are given in a contact belt working area. According to the scheme, the skarn mineralization zone can be stably positioned, and hole arrangement deployment can be served.

The application discloses a method for determining a deep prospecting target area of a skarn type polymetallic deposit by using garnet, and is based on structural alteration lithofacies mapping of a target deposit at different elevations with a scale of 1:500 or larger, and the spatial variation law of the geological characteristics of the deposit is found out. Garnet microfabric identification is carried out, especially the color, structure, structure, generation characteristics of garnet at different spatial positions. Based on the above identification results, in-situ micro-area element content testing of different types of garnet is carried out, and the element content variation law of different types of garnet is found out. The garnet precipitation mechanism is analyzed based on the content of SiO2, Al2O3, FeO, MnO, CaO, W, Sn and Mo. According to the spatial variation of characteristic elements or element combinations, the deep extension mark which can effectively indicate the ore body is extracted, the deep extension law of the polymetallic ore body is determined, and the deep prospecting direction is proposed. The method carries out deep extension and deep positioning of the skarn type polymetallic ore body through characteristic minerals, and provides mineral geochemical basis for deep prospecting of the skarn type polymetallic deposit.

The application discloses a deposit hydrothermal center positioning method and device based on multi-pointer mineral spectral features, and belongs to the technical field of deposit exploration. The method comprises the following steps: acquiring thermal infrared spectral data and corresponding three-dimensional space coordinates; performing feature extraction on the thermal infrared spectral data to obtain skarn mineral alteration zoning diagnostic features; calculating a spatial distance vector and a chemical feature difference vector based on the three-dimensional space coordinates and the skarn mineral alteration zoning diagnostic features, and obtaining a geological gradient vector; performing mapping on the geological gradient vector to obtain a relative gradient position code; fusing the relative gradient position code and the geological gradient vector to obtain a fusion feature; and performing prediction based on the fusion feature to obtain mineralization grade prediction values and hydrothermal center positions of each drilling point. The method can stably extract subtle spectral features, adapt to a noise environment, accurately fuse spatial position and mineral attribute information, accurately position a deposit hydrothermal center, and improve the efficiency and accuracy of mineral exploration.

A method for stepwise magnesium reduction and separation of high-talc skarn copper-molybdenum ore, comprising the steps of pretreatment, first-stage separation, second-stage separation, ore grinding, third-stage separation, and fourth-stage separation.

The application discloses a method for rapidly judging skarn deposit metallogenic prospects based on characteristic parameters of garnet, and the method comprises the following steps: collecting existing geological, geophysical, geochemical and remote sensing data in a research area, and delineating a metallogenic favorable section; collecting garnet-containing samples in the metallogenic favorable section in a zonal manner, and describing the lithology, alteration, mineralization characteristics and hand specimen color of each sample; obtaining the contents of REE (La+Ce+Pr+Nd+Sm+Eu+Gd+Tb+Dy+Ho+Er+Tm+Yb+Lu), Ge, Sn, Zn, Al, Zr and In, which are denoted as c(REE), c(Ge), c(Sn), c(Zn), c(Al), c(Zr) and c(In) respectively, and the unit is ppm; and using discriminant factors f1, f2, f3 and f4 to substitute data for calculation and discrimination; if the four discriminant factors are all judged to have good metallogenic potential, it is determined that the metallogenic favorable section has good skarn deposit metallogenic potential; and in other cases, it is judged that the metallogenic potential is poor.

The invention discloses a method for jointly judging the iron-copper mineralization potential of medium-acidity invading rock based on zircon and apatite, and belongs to the technical field of mineral exploration. Comprising the following steps: (1) systematically collecting an acidic invasive rock sample, and sorting zircon and apatite; (2) carrying out cathodoluminescence image analysis and main trace element test on zircon and apatite; and (3) according to the structure and component characteristics of the zircon and the apatite, calculating the oxygen fugacity delta FMQ, the water content, the Yb / Gd ratio of the zircon and the 100 * XCl / XOH / XF, 1000 * V / (Mn + 100Ga) ratio of the apatite, and rapidly identifying the mineralization potential of the porphyry-skarn type iron-copper ore bed. The method is easy and convenient to operate, short in testing period, high in discrimination efficiency and suitable for rapid screening and prospecting target area delineation of iron-copper mineralizing rock masses in the early exploration stage, and has remarkable practical value and popularization prospects.

This invention discloses a method for determining the iron-copper mineralization potential of intermediate-acidic intrusive rocks based on the combined use of zircon and apatite, belonging to the field of mineral exploration technology. The method includes the following steps: (1) systematically collecting samples of intermediate-acidic intrusive rocks and separating zircon and apatite; (2) conducting cathodoluminescence image analysis and major and trace element testing of zircon and apatite; (3) calculating the oxygen fugacity ΔFMQ, water content, Yb / Gd ratio of zircon, and 100*X of apatite based on the structural and compositional characteristics of zircon and apatite. Cl / X OH / X F The ratio of 1000*V / (Mn+100Ga) is used to quickly identify the mineralization potential of porphyry-skarn type iron-copper deposits. This method is simple to operate, has a short testing cycle, and high discrimination efficiency. It is suitable for the rapid screening of iron-copper ore-forming rock bodies and the delineation of prospecting target areas in the early stages of exploration, and has significant practical value and prospects for promotion.

The invention discloses a same-amplitude strong magnetic anomaly source discrimination method, which comprises the steps of generating a mineral combination consistency graph, an aviation magnetic method characteristic grid set and an aviation gravity characteristic grid set in a contact zone working domain and a unified grid space reference, and obtaining a skarn compatibility weight graph and a residual magnetism direction feasible domain graph; by taking the skarn compatibility weight map and the residual magnetism direction feasible region map as constraints, embedding a gravity-magnetic vector magnetization joint inversion target function to obtain a density body, a magnetic susceptibility body and a residual magnetism direction body; the method comprises the following steps: dividing same-amplitude strong magnetic units into skarn ore bodies or basic / ultra-basic rock veins through a classification discrimination rule, calculating data residual consistency and prior consistency, and generating a source discrimination graph and a credibility graph; carrying out geometric consistency and homodromous change inspection along the direction of the contact zone, and screening out a priority zone; and generating a hole arrangement reference graph and a suggested drilling position and depth interval in the contact zone working area based on the priority zone. According to the scheme, the availability and deployment efficiency of the source judgment result can be improved.

The application discloses a method for judging skarn copper metallogenic potential based on calcite cathodoluminescence characteristics, and belongs to the technical field of mineral exploration, which comprises the following steps: imaging of ore-forming and non-ore-forming calcite samples in skarn, mapping of the color picture of cathodoluminescence from a three-dimensional color space to a one-dimensional brightness space, gathering of pixels with different brightness of the gray-scale picture to the most suitable gray-scale interval, normalization of the gray-scale interval to 0-1, and distinguishing of different gray-scale value groups by different colors; selection of points on the original sample according to the grouped picture, acquisition of trace element data of each gray-scale group, establishment of a gray-scale, element and Cu mutual relationship expression, and finally feedback to the gray-scale value interval to acquire the Cu metallogenic potential of different gray-scale intervals; the application can efficiently, accurately and intuitively reflect the Cu content range in different luminescence intervals and the corresponding luminescence reasons in actual production, and can significantly reduce the judgment cost.

The invention discloses a method for judging mineralization potential of skarn copper based on cathode luminescence characteristics of calcite, which belongs to the technical field of mineral exploration and comprises the following steps of: imaging mineralization and non-mineralization calcite samples in skarn, mapping a cathode luminescence color picture from a three-dimensional color space to a one-dimensional brightness space, and calculating the brightness of the cathode luminescence color picture; pixels with different brightness of the gray scale picture are gathered to the most appropriate gray scale interval, the gray scale intervals are normalized to 0-1, and different gray scale value groups are distinguished through different colors; selecting points on an original sample according to grouped pictures, obtaining trace element data of each gray scale group, establishing a correlation expression of gray scales, elements and Cu, and finally feeding back the correlation expression to gray scale value intervals to obtain Cu mineralization potentials of different gray scale intervals; according to the method, Cu content ranges and corresponding luminescence reasons in different luminescence intervals can be efficiently, accurately and intuitively reflected in actual production, and the judgment cost can be remarkably reduced.