贵州望谟地区构造分析

Analysis for the Geological Structure in Wangmo County ,Guizhou

原始水平或近于水平的岩层 ,在构造应力下发生不同程度的倾斜 ,因此 ,岩层倾角的变化 ,反映了构造变形的性质和程度 ,也是构造分析的基础。本文通过对望谟地区数千个实测岩层产状的统计处理 ,发现区内看起来复杂纷繁的构造形迹 ,总可以分解为若干个相对简单的构造区段 (相对稳定的地块 ) ,构造区段又总是被一个强烈变形的狭长地带(构造不连续带 )分隔 ,并可划分为两个尺度的构造区段和构造不连续带。高级别的构造区段控制或围限低级别的构造区段和构造不连续带 ;高级别的构造不连续带控制区内的构造变形和成矿带的展布。

Primaryhorizontalstratawouldbetiltedindifferentdegreeunderinternal force,asabaseforstructuralanalysis,thechangeofstrataattitudes,therefore,canreflectcharacter anddegreeofstructuraldeformation.Basedonthestatisticsforseveralthousandattitudesofstrata, thestructureseemedcomplexintheregioncanbedecomposedseveralsimpleandstablerelatively structuralblocksbysomelongandnarrowintensivedeformedbelts.Theseblocksandbeltscanbein scaledividedintotwo.Thelarger_rankingonesconstrainonandenclosethesmallerones.Thelarger_ rankingstructuralbeltcontrolsthestructuraldeformationandthedistributionofmetallogenicbelt.