Relationships between the major geologic structures and active fault system in the Mino-Tanba Belt, central Japan.

在志贺县北部和福井县南部沿Yanagase活动断裂及其北部伸展的Neo Synaxis地区，研究了侏罗纪增生带的明显走向摆动。周缘走向摆动形成扭折(巨型)褶皱或人字形褶皱，铰链面呈N-S走向，铰链轴呈垂直倾伏。在北部，走向摆动由较小规模的垂直轴褶皱组成，而在南部，柳噶斯断裂沿紧闭的走向摆动铰接面占据约10公里的半波长。因此，柳额断裂的成因与米诺-坦巴带地层突然走向变化的形成密切相关。本文对坦巴带的Rokko Rault系和Mitoke-Tonoda断裂，以及Mino-Ryoke带的Iida-Matsukawa和Sakaitoge-Kamiya断裂的基底构造、构造地貌和断层-岩石组构进行了详细的研究。结果表明，这些结构元素不仅对于解决活动断裂的历史，而且对于揭示断裂的物理条件和位移意义都是非常重要的。利用结晶度指数标准(CIS)样品对伊利石结晶度数据的标准化进行了检查，以评价增生杂岩的热史。新西兰南岛中生代Torlesse地体的构造分析表明，新近纪的扰动强烈地改变了原有的与吸积有关的构造。次级变形特征与米诺-坦巴带相似，表明围绕中倾转轴至垂直倾转轴的走向摆动是沉积主导型地体的基本构造过程。

The distinct strike-swings of the Jurassic accretionary are studied in the Neo Syntaxis area along the Yanagase active fault and its northern extention in the northern Shiga and southern Fukui Prefectures. The strike-swings around there were formed as kink-like (megakink) or chevron folds with N-S trending hinge surface and verticaly-plunging hinge axis. In the northern part, the strike swings are composed of smaller-scale folds with vertical axes, and in the southern part the Yanagase Fault occupies along the hinge surface of the tightly closed strike-swing about 10 km in half-wavelength. Hence, the origin of the Yanagase fault was intimately related to the formation of the sudden strike-change of the strata of the Mino-Tanba BeltThe basement structures, tectonic topographies and fault-rock fabrics along the Rokko Rault system and Mitoke-Tonoda fault in the Tanba Belt, and the Iida-Matsukawa and Sakaitoge-Kamiya fault in the Mino and Ryoke Belt are precisely studied. As the results, it has clarified that these structural elements are very important not only to solve the history of active faulting but also to reveal the physical conditions and displacement sense of faulting.Standardization of illite crystallinity data were checked by using the Crystallinity Index Standard (CIS) sample to evaluate the thermal history of the accretionary complex. The results suggest that the CIS standardization is a fundamental procedure for comparison of the IC data measured by different laboratories.The structural analyses of the Mesozoic Torlesse Terrane in South Island, New Zealand, suggest that the pre-existing accretion-related structures were strongly modified by the Neogene disturbances. The features of the secondary deformations are comparable to those of the Mino-Tanba Belts, suggesting that the strike-swings about the moderately to vertically plunging rotation axes are fundamental structural process of the accretionary sediment-dominated terrane.