HFS elements to avoid confusion. However, when coupled with microstructural observation, dilatancy/compaction, in a sense similar to case 2 is used to explain chemical results.
Outline of Geology Along the Nojima
AH into AA (for analyzing) and AS (slab for preservation).After carving, the carved surface was fixed with resin ( Figure 3, step 6). AA was utilized mainly for chemical composition and crystal structure analysis, AS was used for texture observations and nondestructive measurements/analysis (such as color analysis) and long-term preservation after surface polishing, and WH was used for various kinds of measurements/observations and analysis (Figure 3, step 7).For understanding the whole trend of fault rock distribution in the GSJ core, surfaces of all drill core (154.24 to 746.60 m) were first observed visually during a period between steps 1 and 2 in Figure 3, and a rough fault rock distribution map was prepared. After completion of core processing, fault rock distribution was reexamined through observation of more than 2000 pieces of polished slabs (AS) in the depth extent from 553.39 to 718.20 m. Then, ---120 thin sections were prepared from throughout the core for observation of deformation/ alteration microstructures. As a result, rock in the drill core were categorized into the following eight types: (1) granodiorite (host rock), (2) porphyry intrusions (host rock), (3) WPAR, (4) fault breccia, (5) cataclasite, (6) ultracataclasite, (7) pseudotachylite, and (8) Step 2 • Entoring tho oriontation roloronco lings onto tho core piecesStep 3 • Preservation (bagging) of pulverized portions in the core boxes and entering the depth range onto the bagsStep 4• Fixing the surfaces of core pieces by resinStep 5 • Numbering and measurement of depth range for each core pieceStep 6 and Tanaka et al. [1995]. The original fault rock distribution map was modified, and a more detailed fault rock distribution map was prepared (see Plate 3 and Figure 5).
Petrographic Characteristics of Host and Fault Rocks