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陕西勉略地区大地构造位置处于扬子板块和秦岭微板块接合部位,该区混杂岩的发现和厘定是国家基金项目“秦岭勉略构造带的组成、演化及动力学特征”的阶段成果,目前所发现的俯冲型和碰撞—逆冲型两类混杂岩分别位于略阳横现河和勉县长坝,分别称之为横现河混杂岩和长坝混杂岩。 横现河混杂岩:出露横现河镇南张崖沟,呈宽约800～1000m的楔状岩片产出,与南北两侧岩片以向南高角度的韧性逆冲断层接触,属泥砂质混杂岩。混杂岩由大小悬殊形态各异的岩块和基质两部分
The Mianle area in Shaanxi Province is located at the junction of the Yangtze Plate and Qinling microplate. The discovery and determination of melanges in this area is the result of the phase project “Composition, Evolution and Dynamics of the Qinling Mianlei Structural Belt” The two types of subducted and collision-thrust type melanges are located in the Hengyanghe and Mianxian dams respectively called Hengxianhe and Changba melanges respectively. Hengxianhe melange: The Hengdianhe zhangzhangyagou is exposed. The wedge-shaped slab with a width of 800-1000m is produced and comes into contact with the ductile thrust at the high south angle on both sides of the north and south strata. rock. Mudstone by the size of the disparity in the shape of rock and matrix two parts