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四川攀枝花—西昌地区的红格岩体是我国典型的层状基性—超基性岩体之一。该岩体存在明显的韵律现象。本文在介绍红格岩体韵律特征的基础上,对其中的的大韵律成因作初步探讨。 一、红格岩体的地质概况 红格岩体所在的攀枝花—西昌地区,地处“康滇地轴”中段。该区广泛出露前震旦系、震旦系、寒武系、奥陶系、志留系、泥盆系、石炭系地层;安宁河谷、雅砻江河谷缺失志留—石炭系地层;晚二叠世的“溢流玄武岩”和中、新生代的沉积则在全区均有分布。
Panzhihua, Sichuan - Hongchang rock in Xichang is one of the typical stratiform basic-ultramafic rocks in China. The rock mass has obvious rhythm phenomenon. Based on the introduction of the rhythm characteristics of the red rock mass, this paper makes a preliminary study of the genesis of the large rhythm. First, the geological overview of red rock body Pangea where the red rock body - Xichang region, is located in “Kang Dian axis” in the middle. The former Sinian, Sinian, Cambrian, Ordovician, Silurian, Devonian and Carboniferous strata are widely exposed in this area. The Anlin River Valley and the Yarlung River valley lack the Silurian-Carboniferous strata. Precipitated “overflow basalts” and Mesozoic and Cenozoic sediments are distributed throughout the region.