地质学毕业论文

Zhejiang province is located in the middle of the west circum-Pacific volcanic belt, which is the main structural and magmatic activity belt during Mesozoic and Cenozoic time in the eastern part of our country, and also the important component of the Pacific tectono-magmatic metallogenic belt. The giant Jiangshan - Shaoxing joint belt divide province into two major geological structures- east Zhejiang unit and west Zhejiang unit which belongs to the southeast edges of the Yangzi Platform. East Zhejiang belongs to South China fold system which features vast development of draped Mesozoic volcanic and red sedimentary basin. Widely invaded igneous rock and Proterozoic metamorphosed strata exposing like fault block uplift presents "one old, one new" geologic structure characteristics.

Zhejiang province is located in the west Pacific middle volcanic belt, is in the east of the new generation of main structure and the magma activity take, is the Pacific rim tectono-magmatic metallogenic belt important component. The province to jiangshan-shaoxing pieced together the giant with divided into east west zhejiang, two major geological tectonic units, west of Yangtze platform of the southeast edge must part. The east of south China is of the development of large area, drape Mesozoic volcanics and red cover sedimentary basin is characteristic, igneous rock intrusion into with a widely fault block into the dew of uplift skylight GuZhou metamorphosed strata distribution, yuan showed "one old new" of the geological structure the east of geological evolution process is very complex, especially yanshan period volcano-magmatic activities is very strong, have more acidic lava rock mass distribution of the period, and the distribution of sex of magma, the distribution of the region's fault that metallogenic conditions is very complicated, predecessors have done a lot of work, a lot of achievements in guiding the prospecting work, but still lacks system and analyze the characteristics of volcanic magma activity this area--each type of mineral formed influenced, control paper and continental volcanic relevant volcano times volcanic hydrothermal ore deposit, volcanic hydrothermal modification type ore deposits and volcanic sedimentary type ore deposits in the transformation the tectonic setting, igneous rock properties and mineralized alteration characteristics, metallogenic fluid source of ore-forming materials and reviewed the Mesozoic silver mining area of lead and zinc into strata, the structure, the geochemical characteristics, geophysical characteristics system analysis, summarized the characteristics of different deposit formation, the geochemical characteristics, structure characteristics, the earth physical feature and metallogenic relations, so as to analysis the east area of Mesozoic silver pb-zn deposit metallogenic conditions and the law, and the classification of different deposits are summarized. Volcanic magmatism at points out that in the process of metallogenic plays an important role in the east, that area looking for volcanic rock and continental silver lead-zinc mine has broad prospects.