Geological Structures Folds

Geological structure is complicated due to numerous faults and foldings. 

Takasu, a. Makino, K. 1980. Stratigraphy and geologic structure of the Sambagawa metamorphic belt in the Bessi district, Shikoku, Japan-reexamination of the recumbent fold structures. Chikyu Kagaku, (Earth Science), 34, 16-26. 

Structural Traps. The attitude of the rocks, whether they are folded, fractured, displaced, or otherwise disturbed, is called their geologic structure. Traps that are due to geologic structure tire known as structural traps. 

Geological structures may be the direct or indirect causes of slope failure, and include faults, folds, dykes, joints, foliations, stratifications, and weak zones due to the presence of mafic minerals. Weak rock, the absence of geological structure, and complex geological structure in which several geological structures are distributed in the slope are also included in this category. 

XLZ field is located at the depth of Yanzhou synclinal, with gentle fold as the primary character, together with a certain amount of fracture structure, which geological structure belongs to the medium complex level. Sketch map of domain hydrogeology shows in Figure 1. 

Keywords reservoir structures, faults, folds, depositional environments, diagenesis, geological controls, porosity, permeability... 

Horne, R. Culshaw, N. 2001. Flexural-slip folding in the Meguma Group, Nova Sootia. Journal of Structural Geology, 23, 1631-1652. 

In the 1990-ies Georgian geological institutions were carrying out survey studies in order to determine and investigate some favourable structures for UGS facilities. These appropriate structures of brachyanticlines and anticlinal domes within folds consisting also of such rocks can be used as gas reservoirs (mainly cracked sandstones, tuff sandstones and tuff breccias). They are displayed at depths around 1000-1500 meters - sometimes even more than 2000 meters - and are covered with waterproof and gas-proof limestone rocks, with capacities estimated at 1-1.5 bcm [8],... 

Since a spectrum is determined by the structure of the sample, which in turn is a con-.sequence of the forces (and particularly the intermolecular forces in the solid state), this technique is able to provide two-fold information. An introduction to the application of the discussed methods towards the investigation of intermolecular forces is provided in Sec. 5.2, including a short review of the quality which can be obtained. Another obvious application is the identification of samples. Table 4.5-1 demonstrates clearly that, if the formula is known, the spectra provide an indication of the phase of a sample. By using micro-techniques it is possible to identify samples or parts of samples in fields ranging as widely as geology, medicine (kidney stones), pharmacy, electronics, painting (mineral pigments), and materials research. 

Ren Jianye. Identification of Cenozoic fold-thrust structure and its dynamic setting in Jiyang Sag. Geological Science and Technology Information, 2004 23(3) 1-5. 

Structure map It shows the surface of a buried layer of sediment. Depending on the geology, this buried layer is contoured based on shallow or deep-penetration seismic data. The contours could show the amoxmt of fault offset as well as relief of folds. 

On a smaller scale, petroleum geology is concerned with the way in which strata may be deformed into folds, and how they may be raptured and displaced by faults. Such structural deformation may form features capable of trapping migrating petroleum. 

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