摘要
对梅陇断裂带变形岩石中的火山砾及石英粗晶进行二维和三维应变分析的结果表明:发生在晚侏罗世末—早白垩世的一次韧性变形其应变类型为平面型(k=1±0.3,ν=0±0.2);应变椭球主轴方位X为223°∠20°、Y为为117°∠35°、Z为335°∠45°,XY面为156°∠45°,与宏观主要变形面理产状一致;下侏罗统的金鸡组在此前经过另一次变形变质作用;长埔锡矿一带时代不明的火山杂岩体与高基坪群应为同期或相近期之产物。
The results of two-and three-dimensoinal strain analysis of lapilliand quartz macrocryst in deformed rocks within the Meilong fracture zone show that a late Late Jurassic-Early Jurassic ductile deformationbelongs to the plane strain type (k=1±0.3, v=0±0.2 ); The spindleazimuth of strain ellipsoid (X: 223°∠20°, Y:117°∠35°,Z:335°∠45°, XY:156°∠45°) is in concordance with the occurrence of the main macroscopicdeformed plane schistosity; The Upper Jurassic Jinji Formation hasundergone another deformation-metamorphism before the preceding stage;The unidentified volcanic complex in the Changpu tin deposit and theGaojiping Group should be the products of the same stage or the near stage.
关键词
断裂带
剪切带
广东
变形岩石
fracture zone
shear zone
fabric analysis
strain analysis
Guangdong/deformed rocks
