10 results about "Metamorphism" patented technology

The invention belongs to the technical field of low-temperature vein ore deposit mineralization center positioning methods, and particularly relates to a low-temperature vein ore deposit mineralization center positioning method based on muscovite group minerals, which comprises the following steps of: collecting, analyzing and sorting regional geological data, and collecting geological characteristics, mineralization background, regional structure and metamorphic background of a mining area; analyzing muscovite cause types and determining mineralization conditions; field geological survey sampling and drilling rock core logging are carried out, surrounding rock alteration characteristics are observed, sampling and logging rock cores are recorded, and test samples are collected at intervals; the short-wave infrared spectrum technology, the electronic probe technology and the laser Raman spectrum technology are creatively integrated, classification characterization and multi-dimensional data mining are carried out on muscovite family minerals, key parameters such as Pos2200, ISM values and Raman peak displacement of the muscovite family minerals are extracted, muscovite types related to and unrelated to the minerals can be effectively distinguished, invalid indication information is eliminated, and the mining quality is improved. The positioning precision of the concealed ore body is remarkably improved, and the problems that relevance interpretation is insufficient and positioning is fuzzy in a traditional single technical means are solved.

The invention discloses a method for testing uniaxial compression mechanical properties of prefabricated fractured rock under the action of acid etching, which comprises the following steps: S1, preparing a sample, and taking deteriorated sandstone; s2, preparing a rock sample, namely preparing the modified sandstone into a standard cylindrical sample of phi 50 mm * 100 mm, and making a prefabricated fracture in the geometric center of the sample; s3, preparing a corrosive liquid with the pH value of 2; s4, dividing the rock samples prepared in the step S2 into two groups according to a fracture inclination angle alpha, wherein each group comprises four rock samples; wherein one group is used as a control group, is placed in air at room temperature for 48 hours and then is subjected to a uniaxial compression test; the other group of samples are immersed in the acidic solution with the pH value of 2 obtained in the step S3, four samples are obtained under each condition, and the samples are immersed for 20 d under the condition that the container is sealed; s5, performing a uniaxial compression test on a uniaxial compression testing machine; and S6, observing the rock sample damaged in the compression test by using Axia Chemi SEM to obtain the fracture development condition.

This invention belongs to the field of geological and mineral survey technology, specifically involving a comprehensive survey system for the rubidium enrichment mechanism of metamorphic rocks based on micro-area in-situ technology. It includes a module for precise characterization of rubidium occurrence state through in-situ petrography, a module for multi-dimensional isotopic mass spectrometry combined with analysis, a module for quantitative inversion of rubidium migration and enrichment behavior, and a module for spatiotemporal coupling and mineralization prediction of multi-stage metamorphic events. These four modules adopt a dual-closed-loop coupling architecture. This invention achieves a significant improvement in spatial characterization accuracy and comprehensiveness, completely overcoming the limitations of existing two-dimensional characterization techniques. By establishing an X-Y-Z three-dimensional coordinate system through a three-dimensional spatial coordinate calibration unit, it achieves full-dimensional characterization of rubidium in the plane and depth directions of metamorphic rock samples. Combined with hierarchical chemical extraction and time-of-flight secondary ion mass spectrometry nanoscale surface scanning technology, it achieves for the first time precise decoupling of the three occurrence states of rubidium: lattice state, adsorption state, and fluid inclusion state, breaking through the technical bottleneck of traditional methods being unable to distinguish the occurrence states of rubidium.

According to the method for measuring the true density of the coal rock, provided by the invention, different evolution stages experienced by the coal rock in a complex geological history can be efficiently and accurately identified. The stages cover the initial diagenesis to the later metamorphism, and each stage is accompanied by significant changes of physical and chemical properties of the coal rock. Besides, the method also has excellent distinguishing capability, the carbonaceous mudstone can be clearly and effectively distinguished from other types of coal rocks, and the carbonaceous mudstone is used as a special sedimentary rock, has complex components, often contains relatively high organic matters, and has significant difference from conventional coal rocks in multiple aspects. Therefore, the method not only contributes to deepening the understanding of the formation cause and the evolution process of the coal rock, but also provides important technical support and scientific basis for the fields of exploration and development of coal resources, environmental protection and the like.

The invention discloses an identification method for interlayer type weathering of a metamorphic sandstone stock ground, and belongs to the technical field of rock-fill dam material preparation processes. The invention provides the identification method for the interlayer type weathering of the metamorphic sandstone stock ground, which can effectively identify the interlayer type weathering condition of the metamorphic sandstone. The method comprises the following steps: firstly, carrying out lithology and spatial distribution exploration on a metamorphic sandstone stock ground, then analyzing and judging whether interlayer type weathering exists in the metamorphic sandstone stock ground through regional geologic causes, and when the interlayer type weathering exists, introducing a saturated uniaxial compressive strength statistical analysis tool to carry out secondary judgment. When it is judged that the interlayer type weathering condition exists in the metamorphic sandstone stock ground again, a pre-rolling test is conducted on rockfill materials mined in the metamorphic sandstone stock ground through the pre-rolling test technology, final judgment is conducted, and finally the blasting mining mode is determined according to the final judgment conclusion and the characteristics of the interlayer type weathering sandstone stock ground. Therefore, the dam material which meets the required characteristics and is good in gradation is obtained.

The invention discloses a method for predicting micromechanical properties of a machined surface. The method comprises the following steps: acquiring microstructure characteristics and residual stress distribution of a metamorphic layer on the surface of a target test piece; establishing a representative unit model based on the microstructure characteristics; giving a mechanical response equation to the representative unit model through the crystal plasticity constitutive model; based on the residual stress distribution, introducing the residual stress into the representative unit model in a predefined field form; judging the effectiveness of the representative unit model after the mechanical response equation and the residual stress are introduced, and obtaining the micromechanical property parameters of the surface metamorphic layer of the target test piece through the effective representative unit model. According to the method, the influence of the microstructure and the residual stress on the micromechanical property is comprehensively considered, compared with a model only considering a single factor, the prediction precision can be effectively improved, and a basis is provided for improving the surface mechanical property by regulating and controlling the microstructure characteristics and the residual stress.

The present application relates to a kind of polar permafrost cooling drilling device, i.e.method, to the problem of polar environment due to drill bit friction heat generation, temperature change in well causes wellbore instability deformation, rock sample thermal metamorphism etc., provide a kind of cooling drilling device and method.The present application is to maintain the function of low temperature foam drilling fluid circulation in low temperature environment in well, the drilling device provided has air sandwich and hole slot structure, realize the circulation of low temperature foam drilling fluid in the inside of drilling sampler, play the cooling effect, and avoid contact wellbore.This device can maintain wellbore stability, protect rock sample in polar permafrost environment compared with conventional drilling device.

The invention relates to the technical field of mineral exploration, in particular to a hidden granite high-precision three-dimensional prediction method, device, equipment and medium, firstly, a surrounding rock sample of granite is collected in a known area, and mineralogy quantitative indexes for quantitatively representing the thermal metamorphism degree are extracted through TIMA analysis; and establishing a quantitative relation prediction model between the mineralogical quantitative index and the vertical distance from the top surface of the concealed granite. In a prediction area, a sample is analyzed and calculated by using a quantitative relation prediction model, and a three-dimensional shape model of the top surface of the hidden granite in the prediction area can be quickly generated after interpolation. According to the method, the transformation from qualitative experience judgment to quantitative and high-precision three-dimensional prediction is realized, the accuracy and efficiency of hidden granite prediction are remarkably improved, and the method is of great significance to deep prospecting of a granite area.

The invention provides a corresponding identification method for a high-temperature metamorphic hydrothermal uranium deposit and a collision mountain-building evolution stage, and the method comprises the following steps: collecting an ore sample containing a uraninite in a target deposit, and preparing a sheet sample; the slice sample is observed through lithofacies, a target hydrothermal mineral formed in the same period as uranium mineralization is determined, micro-area in-situ analysis is adopted, micro-area analysis point components of the target hydrothermal mineral are determined, and the temperature of the micro-area analysis point components is calculated; based on the spatial distribution of the analysis points, the temperature change trend of the uranium metallogenic process is constructed; obtaining regional metamorphic rocks of the collision mountain-building zone where the target uranium deposit is located, and determining evolution characteristics of the regional metamorphic rocks; and comparing the temperature change trend with the evolution characteristics, determining regional metamorphic rock evolution characteristics corresponding to the uranium mineralization effect, and identifying a corresponding relation between uranium mineralization and collision mountain building evolution stages. According to the method, the technical problem that in the prior art, the corresponding relation between the high-temperature metamorphic hydrothermal uranium ore deposit mineralization process of the collision mountain-building zone and each stage of regional metamorphic evolution cannot be accurately and quantitatively recognized is solved.