甘肃西部马鞍山复式岩体侵入期次遥感解译与成矿分析
发布时间：2019-03-29 16:16
【摘要】：论文以“西部重点成矿区带高分遥感地质矿产调查技术研发与应用示范”项目为依托,对甘肃西部马鞍山复式岩体研究区进行了线性构造解译、岩体期次划分、周边成矿作用分析以及成矿潜力预测。在前人地质工作的基础上,利用遥感技术的优势,结合中低分辨率多光谱数据及高分遥感数据等多源数据提取地质信息,从区域构造入手,分析了活动岩浆就位机制,并较为准确的查清了该复式岩体的侵入期次。取得的主要成果如下:(1)对多源遥感数据(ETM+、ASTER以及Worldview-2数据)进行数字图像增强处理,包括波段组合、反差增强、HIS图像融合等,增强不同岩性、地物之间的图像差异,并结合岩石样品光谱曲线特征,将马鞍山复式岩体三个超单元侵入岩序列进一步细分为14个侵入期次,突显了高分辨率遥感数据在精细岩性构造填图的优势。同时,本文对于南部红山序列的解译填补了该区域地质研究的空白。(2)使用空间域定向滤波和假彩色合成方法增强遥感影像的线状、环状构造信息,解译了复式岩体周边的线性构造特征,并结合地区地质资料初步确定了区域构造格架,从遥感宏观尺度上分析了岩浆活动侵位时间、机制以及后期岩体演化的基本特征。(3)分析研究区及周边矿产分布及矿床、矿化地质特征,推测马鞍山复式岩体岩浆热液活动与北侧铜镍矿化、南侧金矿化的成矿作用没有密切关系,研究区周围矿体矿化特征符合“小岩体成矿”理论,可以此为指导部署下一步矿产普查、详查、勘探工作。(4)利用ETM+和ASTER多光谱数据对复式岩体及周围区域进行铁染蚀变信息、铝羟基和镁羟基蚀变信息,结合该区域已知矿床、矿化点信息,综合分析成矿地质特征及成矿要素,对区域成矿潜力进行预测分析。根据预测区分级原则,圈定了4个A级成矿远景区,4个B级成矿远景区,3个C级成矿远景区。
[Abstract]:Based on the project of "R & D and Application demonstration of remote Sensing Geology and Mineral Resources Survey Technology with High score in key metallogenic zones in the West of Gansu Province", the paper has carried out linear structural interpretation and classification of rock mass in Ma'anshan complex rock mass study area in the west of Gansu Province. Analysis of peripheral mineralization and prediction of ore-forming potential. On the basis of previous geological work, using the advantage of remote sensing technology, combined with multi-source data such as middle-low resolution multi-spectral data and high-resolution remote sensing data to extract geological information, starting from the regional structure, the mechanism of active magmatic location is analyzed. The intrusive period of the complex rock mass is found out accurately. The main achievements are as follows: (1) Digital image enhancement processing for multi-source remote sensing data (ETM, ASTER and Worldview-2 data, including band combination, contrast enhancement, HIS image fusion and so on, to enhance different lithology. In combination with the spectral curve characteristics of rock samples, the three super-unit intrusive rock sequences of Maanshan composite rock mass are further subdivided into 14 intrusive periods, according to the image differences between the features and the spectral curves of rock samples. The advantages of high resolution remote sensing data in fine lithological structural mapping are highlighted. At the same time, the interpretation of the southern Hongshan sequence fills the blank of geological research in this region. (2) the spatial domain directional filtering and false color synthesis are used to enhance the linear and annular structural information of remote sensing images. The linear tectonic characteristics around the complex rock mass are interpreted, and the regional tectonic framework is preliminarily determined based on the regional geological data, and the emplacement time of magmatic activity is analyzed from the macro-scale of remote sensing. The mechanism and the basic characteristics of the evolution of the later rock mass. (3) the distribution of mineral resources and ore deposits, mineralized geological characteristics of the study area and surrounding rocks are analyzed, and the magmatic hydrothermal activity and the copper-nickel mineralization in the northern side of the Maanshan complex are inferred. The mineralization of gold mineralization on the southern side is not closely related, and the mineralization characteristics of orebodies around the study area are in accordance with the theory of "small rock body mineralization", which can be used as a guide for the deployment of the next mineral survey and detailed investigation. Exploration work. (4) using ETM and ASTER multispectral data to carry out iron staining and alteration information of complex rock mass and surrounding area, aluminum hydroxyl group and magnesium hydroxyl group alteration information, combined with the information of known ore deposits and mineralizing points in this area, The ore-forming geological characteristics and ore-forming elements are comprehensively analyzed, and the regional ore-forming potential is predicted and analyzed. According to the classification principle of prediction area, 4 A-grade ore-forming prospect, 4 B-grade ore-forming prospect and 3 C-grade ore-forming prospect are defined.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P627
本文编号：2449691
[Abstract]:Based on the project of "R & D and Application demonstration of remote Sensing Geology and Mineral Resources Survey Technology with High score in key metallogenic zones in the West of Gansu Province", the paper has carried out linear structural interpretation and classification of rock mass in Ma'anshan complex rock mass study area in the west of Gansu Province. Analysis of peripheral mineralization and prediction of ore-forming potential. On the basis of previous geological work, using the advantage of remote sensing technology, combined with multi-source data such as middle-low resolution multi-spectral data and high-resolution remote sensing data to extract geological information, starting from the regional structure, the mechanism of active magmatic location is analyzed. The intrusive period of the complex rock mass is found out accurately. The main achievements are as follows: (1) Digital image enhancement processing for multi-source remote sensing data (ETM, ASTER and Worldview-2 data, including band combination, contrast enhancement, HIS image fusion and so on, to enhance different lithology. In combination with the spectral curve characteristics of rock samples, the three super-unit intrusive rock sequences of Maanshan composite rock mass are further subdivided into 14 intrusive periods, according to the image differences between the features and the spectral curves of rock samples. The advantages of high resolution remote sensing data in fine lithological structural mapping are highlighted. At the same time, the interpretation of the southern Hongshan sequence fills the blank of geological research in this region. (2) the spatial domain directional filtering and false color synthesis are used to enhance the linear and annular structural information of remote sensing images. The linear tectonic characteristics around the complex rock mass are interpreted, and the regional tectonic framework is preliminarily determined based on the regional geological data, and the emplacement time of magmatic activity is analyzed from the macro-scale of remote sensing. The mechanism and the basic characteristics of the evolution of the later rock mass. (3) the distribution of mineral resources and ore deposits, mineralized geological characteristics of the study area and surrounding rocks are analyzed, and the magmatic hydrothermal activity and the copper-nickel mineralization in the northern side of the Maanshan complex are inferred. The mineralization of gold mineralization on the southern side is not closely related, and the mineralization characteristics of orebodies around the study area are in accordance with the theory of "small rock body mineralization", which can be used as a guide for the deployment of the next mineral survey and detailed investigation. Exploration work. (4) using ETM and ASTER multispectral data to carry out iron staining and alteration information of complex rock mass and surrounding area, aluminum hydroxyl group and magnesium hydroxyl group alteration information, combined with the information of known ore deposits and mineralizing points in this area, The ore-forming geological characteristics and ore-forming elements are comprehensively analyzed, and the regional ore-forming potential is predicted and analyzed. According to the classification principle of prediction area, 4 A-grade ore-forming prospect, 4 B-grade ore-forming prospect and 3 C-grade ore-forming prospect are defined.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P627
【参考文献】
相关硕士学位论文 前1条
1 郑硕;基于ASTER多光谱遥感数据的花岗岩类岩性识别与提取[D];安徽师范大学;2012年
，本文编号：2449691
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