Lanping basin is located between Lancangjiang fault and Jinshajiang fault. Himalayan movement is the important tectogenesis, during which the activity of mid\|alkali magma is strong. For a long time, because the previ...Lanping basin is located between Lancangjiang fault and Jinshajiang fault. Himalayan movement is the important tectogenesis, during which the activity of mid\|alkali magma is strong. For a long time, because the previous had focused on studying porphyry copper, lead, zinc multi metal ore deposit in east uplift to this area, and they had ignored the relationship between Himalayan tectonomagnetic movement and multi\|metal mineralization in the basin.1 Characteristic of the Himalayan magmatic rock Himalayan magmatic rocks, a part of Himalayan porphyry zone, mainly distributed along Lijiang\|Beiya\|Weishan, which is the east to Lanping basin. There are a few magmatic rocks in the basin, a big scale of which is Yongping Zhuopan rock body, Yunlong Zaojiaochang rock body and Eryuan Shangyicun rock body. These magmatic rocks are mainly intrusion rocks and their characteristics are quartz syenite porphyry, alkalic rock, and granite porphyry. The ratio 87 Sr/ 86 Sr of rocks is 0 7046～0 7084, which reflects the magma source comes from mantle.The average isotopic age of these magmatic rocks is 40Ma. For example, Zhuopan rock body’s age of K\|Ar is 33 8Ma, Weishan rock body’s age of K\|Ar is 46 9Ma.展开更多
文摘Lanping basin is located between Lancangjiang fault and Jinshajiang fault. Himalayan movement is the important tectogenesis, during which the activity of mid\|alkali magma is strong. For a long time, because the previous had focused on studying porphyry copper, lead, zinc multi metal ore deposit in east uplift to this area, and they had ignored the relationship between Himalayan tectonomagnetic movement and multi\|metal mineralization in the basin.1 Characteristic of the Himalayan magmatic rock Himalayan magmatic rocks, a part of Himalayan porphyry zone, mainly distributed along Lijiang\|Beiya\|Weishan, which is the east to Lanping basin. There are a few magmatic rocks in the basin, a big scale of which is Yongping Zhuopan rock body, Yunlong Zaojiaochang rock body and Eryuan Shangyicun rock body. These magmatic rocks are mainly intrusion rocks and their characteristics are quartz syenite porphyry, alkalic rock, and granite porphyry. The ratio 87 Sr/ 86 Sr of rocks is 0 7046～0 7084, which reflects the magma source comes from mantle.The average isotopic age of these magmatic rocks is 40Ma. For example, Zhuopan rock body’s age of K\|Ar is 33 8Ma, Weishan rock body’s age of K\|Ar is 46 9Ma.
