Application of ALI, ASTER and World View-2 imagery for mineral prospecting – a case study in the Maizijing-Shulonggou area, Ningxia Hui autonomous region, China
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- 论文作者：徐元进 ; Meng Pengyan ; Wu Hao
- 英文论文作者：Xu Yuanjin ; Meng Pengyan ; Wu Hao ; Institute of Mathematical Geology and Remote Sensing Geology ; Faculty of Earth Resources ; China University of Geosciences ; Hubei Institute of Land Surveying and Mapping
- 年：2016
- 作者机构：中国地质大学(武汉)资源学院数学地质遥感地质研究所;Hubei Institute of Land Surveying and Mapping;
- 英文论文关键词：remote sensing ; mineral prospecting ; fracture ; hydrothermal alteration ; gold mineralization ; Maizijing-Shulonggou area
- 会议召开时间：2016-10-21
- 会议录名称：第十五届全国数学地质与地学信息学术研讨会论文集
- 英文会议录名称：Proceedings of the 15th National Workshop on Mathematical Geosciences and Geoinformatics
- 语种：英文
- 分类号：P618.51;P624
- 学会代码：ZSYD
- 会议名称：第十五届全国数学地质与地学信息学术研讨会
- 会议地点：中国湖南长沙
- 主办单位：中国地质学会数学地质与地学信息专业委员会、中南大学、湖南省国土资源厅、湖南省地质学会
- 学会名称：中国地质学会数学地质与地学信息专业委员会
- 页数：1
- 文件大小：701k
- 原文格式：D
- 会议级别：全国
摘要
To explore clues for gold prospecting in the Maizijing-Shulonggou area, Ningxia Hui autonomous region, China, this study extracted geological information related to fracture zones and hydrothermal alterations using ALI, ASTER, and World View-2 data, and subsequently, explored potential relationships between extracted geological characteristics and gold mineralization. The World View-2 image in the study area was used for fracture interpretation. The azimuth and density of linear fractures were investigated, and the results showed that linear fractures with NE direction were most common, identified gold mineralization spots except Au2 were all located in NE fracture zones, and all gold mineralization spots located in high fracture density areas where NE and NW fractures were the most common observations. Hydrothermal alteration minerals in exposed bedrocks were mapped using ALI and ASTER data. The spatial distribution of alteration minerals revealed regional specific alteration mineral in gold mineralization. In the northern Maizijing region, the composition of alteration mineral in the surrounding of Au1 was overwhelmed by quartz, while the alteration minerals in the surrounding of Au2-4 were dominated by limonite in the southern Shulonggou region. In the southern Shulonggou region, pyrite in buried quartz-pyritization belt and illitization-pyritization belt is likely to be the precursor of limonite. Heavy mineral assemblages were analyzed for native gold content, and the results suggested high native gold content in the illitization-pyritization belt, followed by quartz-pyritization belt, which was consistent with the strong association of limonite and gold mineralization.
To explore clues for gold prospecting in the Maizijing-Shulonggou area, Ningxia Hui autonomous region, China, this study extracted geological information related to fracture zones and hydrothermal alterations using ALI, ASTER, and World View-2 data, and subsequently, explored potential relationships between extracted geological characteristics and gold mineralization. The World View-2 image in the study area was used for fracture interpretation. The azimuth and density of linear fractures were investigated, and the results showed that linear fractures with NE direction were most common, identified gold mineralization spots except Au2 were all located in NE fracture zones, and all gold mineralization spots located in high fracture density areas where NE and NW fractures were the most common observations. Hydrothermal alteration minerals in exposed bedrocks were mapped using ALI and ASTER data. The spatial distribution of alteration minerals revealed regional specific alteration mineral in gold mineralization. In the northern Maizijing region, the composition of alteration mineral in the surrounding of Au1 was overwhelmed by quartz, while the alteration minerals in the surrounding of Au2-4 were dominated by limonite in the southern Shulonggou region. In the southern Shulonggou region, pyrite in buried quartz-pyritization belt and illitization-pyritization belt is likely to be the precursor of limonite. Heavy mineral assemblages were analyzed for native gold content, and the results suggested high native gold content in the illitization-pyritization belt, followed by quartz-pyritization belt, which was consistent with the strong association of limonite and gold mineralization.
To explore clues for gold prospecting in the Maizijing-Shulonggou area, Ningxia Hui autonomous region, China, this study extracted geological information related to fracture zones and hydrothermal alterations using ALI, ASTER, and World View-2 data, and subsequently, explored potential relationships between extracted geological characteristics and gold mineralization. The World View-2 image in the study area was used for fracture interpretation. The azimuth and density of linear fractures were investigated, and the results showed that linear fractures with NE direction were most common, identified gold mineralization spots except Au2 were all located in NE fracture zones, and all gold mineralization spots located in high fracture density areas where NE and NW fractures were the most common observations. Hydrothermal alteration minerals in exposed bedrocks were mapped using ALI and ASTER data. The spatial distribution of alteration minerals revealed regional specific alteration mineral in gold mineralization. In the northern Maizijing region, the composition of alteration mineral in the surrounding of Au1 was overwhelmed by quartz, while the alteration minerals in the surrounding of Au2-4 were dominated by limonite in the southern Shulonggou region. In the southern Shulonggou region, pyrite in buried quartz-pyritization belt and illitization-pyritization belt is likely to be the precursor of limonite. Heavy mineral assemblages were analyzed for native gold content, and the results suggested high native gold content in the illitization-pyritization belt, followed by quartz-pyritization belt, which was consistent with the strong association of limonite and gold mineralization.
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