区域构造与成矿

区域构造与成矿
区域构造与成矿
区域构造与成矿
同造山过程区的域构造大与成规矿 模成矿作用
区域构造与成矿
课程重点内容 • 一、区域构造特征及控矿意义 • 二、大型构造类型与成矿系统 • 三、全球构造及中国区域构造划分 • 四、中国成矿区带的划分 • 五、中国主要成矿区带特征
区域构造与成矿
• 一、大型构造特征及控矿意义
• 1、大型构造的概念 • 地质构造的空间尺度很广阔，一般将那些贯通
区域构造与成矿
• 问题的提出： • 1、为什麽众多类型的矿床沿着环太平洋区域
分布？ • 2、为什麽环太平洋成矿带主要矿床的成矿年
龄多为中生代？ • 3、为什麽青藏高原的矿床形成年代多为新生
代？ • 4、为什麽我国胶东地区分布有众多大型金矿
床？
区域构造与成矿
区域构造与成矿
Βιβλιοθήκη Baidu 区域构造与成矿
玉龙铜矿；呷村银矿；兰坪铅锌矿 均为超大型矿床
区域构造与成矿
Artist's cross section illustrating the main types of plate boundaries (see text); East African Rift Zone is a good example of a continental rift zone. (Cross section by JoséF. Vigil from This Dynamic Planet -- a wall map produced jointly by the U.S. Geological Survey, the Smith区so域n构i造a与n成In矿stitution, and the U.S. Naval Research Laboratory.)
区域构造与成矿
Computer-generated detailed topographic map of a segment of the Mid-Oceanic Ridge. "Warm" colors (yellow to red) indicate the ridge rising above the seafloor, and the "cool" colors (green to blue) represent lower elevations. This image (at latitude 9° north) is of a small part of the East Pacific Rise. (Imagery courtesy of Stacey Tighe, University of Rhode Island.)
区域构造与成矿
区域构造与成矿
Map of East Africa showing some of the historically active volcanoes(red triangles) and the Afar Triangle (shaded, center) -- a so-called triple junction (or triple point)
区域构造与成矿
• 区域构造运动常能诱发和控制沉积、岩 浆、变质和流体作用的类型，以及改变 区域地球物理场和地球化学场的特征
• 其动力学条件包括板块离散与俯冲速率、 构造应力的拉张、挤压及其速率，以及 俯冲、底辟和垫托作用(underplating)等造 成的动力学因素直接或间接地影响区域 成岩、成矿的环境和作用过程。
地壳，可影响上地慢的构造称为大型和巨型构 造，其长度在100-1000 km或更长，深度可达几 十公里到上百公里。
– 如与伸展构造有关的裂谷、拗拉槽、大型同生断层、 盆岭构造、变质核杂岩构造等；
– 与挤压构造有关的大型逆冲断层、大型推覆构造、 构造混杂岩带等；
– 与地壳水平剪切变形有关的转换断层、大型走滑断 层等。
The Mid-Atlantic Ridge, which splits nearly the entire Atlantic Ocean north to south, is probably the bestknown and moststudied example of a divergent-plate boundary. (Illustration adapted from the map This Dynamic Planet.)
区域构造与成矿
区域构造与成矿
Map showing the Mid-Atlantic Ridge splitting Iceland and separating the North American and Eurasian Plates. The map also shows Reykjavik, the capital of Iceland, the Thingvellir area, and the locations of some of Iceland's active volcanoes (red triangles), including Krafla.
玉龙斑岩铜矿 冈底斯斑岩铜矿带
呷村银矿 斑岩铜金矿带
青藏高原碰两撞种造不山带同与背斑区景域岩构造铜的与成矿斑矿 岩铜矿带
区域构造与成矿
Geologic map of the Jiaodong Peninsula, showing the distribution of gold deposits
Aerial view of the area around Thingvellir, Iceland, showing a fissure zone (in shadow) that is an on-land exposure of the Mid-Atlantic Ridge. Right of the fissure, the North American Plate is pulling westward away from the Eurasian Plate (left of fissure).