论文部分内容阅读
一、概况武都县位于大陆腹地的陇南山区中部,属西秦岭与岷山支脉。白龙江发源于岷山北侧,流经武都县汇入嘉陵江。地质构造属秦岭褶皱地区的次生褶皱带,岩层走向北西一东南向。岩性多为古生代志留纪(距今35亿年前)的灰质千枚岩、板岩、石灰岩、沙岩等浅变质碎屑岩(含有铀钼等稀有金属),由于造山运动从志留纪起经过华力西、加里东、印支、燕山、喜马拉雅运动(原是印度洋和地中海之间的低槽,现变为高山)而造成了褶皱、断裂、挤压、破碎,特别是自龙江一带,又处于长达几百公里的复活断层线上,山高坡陡,沟壑纵横。县内海拔高度相差悬殊,
I. Overview Wudu County is located in the hinterland of the central Longnan Mountains, West Qinling and Minshan branch vein. Bailongjiang originated in the northern side of Minshan, Wudu County flows through Jialing River. The geological structure belongs to the secondary fold belt in the Qinling fold area, and the rock formation goes northwest to southeast. Lithology mostly Paleozoic Silurian (from 3.5 billion years ago) of lime phyllite, slate, limestone, sandstone and other shallow metamorphic clastic rocks (containing uranium molybdenum and other rare metals), due to the orogeny from Chi From the beginning through the Variscan, Caledonian, Indo-China, Yanshan, Himalayan movement (formerly the low trough between the Indian Ocean and the Mediterranean, now become the mountain) and caused by folding, rupture, crushing, crushing, especially since the dragon River area, but also in up to hundreds of kilometers of the revival fault line, steep mountain slopes, ravines aspect. County disparity between the altitude,