1998 Vol. 4, No. 3

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INNOVATION AND DEVELOPMENT OF GEOMECHANICS
Sun Dianqing, Dong Shuwen
1998, 4(3): 1-8.
Abstract (208) PDF (281KB)(12)
Abstract:
The innovation of geomechanics created by Professor J.S.Lee(Li Siguang) is expounded and discussed from scientific innovation system,technological innovation system,application and dissemination system.In the transition from the old contrary to the new authors put forward how to develop geomechanics...
MECHANICAL PROPERTIES OF THE STRUCTURAL ELEMENTS OF THE GLOBAL TORSION TECTONIC SYSTEM
Zhang Yonghong
1998, 4(3): 9-19.
Abstract (178) PDF (539KB)(8)
Abstract:
The divsion and displacement of the plates of the world are not random.They are combined into a unified stress field by a tectonic framework of different mechanical properties to form a global torsion tectonic system.The system consists of a NWW-trending helix shaped torsion compressed fracture belt...
ON THE EFFECT OF ALTERNATING STRESS RESULTING FROM THE TIDAL FORCE AND ITS BEARING ON GEODYNAMICS
Wu Zhenhan
1998, 4(3): 20-27.
Abstract (275) PDF (309KB)(6)
Abstract:
Under the action of tidal force of the Sun and Moon a periodic tidal force and the westward tidal drag occur in the Earth,the former belonging to a symmetric cyclic alternating stress results in the tectonic stress which is the order of magnitude of 104Pa roughly equal to static tectonic stress of 1...
MODELLING OF PROGRESSIVE FAILURE OF BRITTLE DISORDERED MATERIALS E. G. SANDSTONE
Xing Jibo, Yu Liangqun, Wang Yongjia
1998, 4(3): 28-35.
Abstract (201) PDF (388KB)(5)
Abstract:
In this paper the beam-particle model at a fine structural scale is presented for analysis of the progressive failure of such brittle disordered materials as sandstone by diffe rent loadings.In the model,the media are divided as an assembly of particle elements linked by elastic brittle beam element...
A NEW METHOD TO DETERMINE THE DIFFERENTIAL STRESS OF DIP-SLIP FAULTS
Chen Shuping, Zhong Jianhua, Song Quanyou
1998, 4(3): 36-40.
Abstract (359) PDF (201KB)(15)
Abstract:
Structural geology seeks to approach its subject of study in a quantitative way.Stress and strain analysis of structures are essential to this approach.In the stress analysis,we can often determine the directions of the principal stresses,instead of their magnitudes.In this paper,we develop the equa...
STRUCTURAL SYSTEMS IN THE WEST QINLING AND ADJACENT REGION AND THEIR EVOLUTION
Du Zitu, Wu Ganguo, Lü Guxian, Wang Ping'an, Dong Faxian
1998, 4(3): 41-49.
Abstract (254) PDF (446KB)(15)
Abstract:
A study of the division of structural systems in the West Qinling and its adjacent region and their evolution is made. First, we have the tectonic systems prior to the Indosinian movement. Next we come to the major Meso-Cenzoic systems which can be divided into the E-W-trending. N-S-trending, NE-tre...
TECTONIC SYSTEMS IN TARIM BASIN CONTROLLING OVER OIL AND GAS
Kang Yuzhu
1998, 4(3): 50-57.
Abstract (150) PDF (347KB)(5)
Abstract:
The Tarim Basin is a promising petroliferous area where many tectonic systems are known to compound each other. The research results show that the second-order tectonic systems in the Basin control the oil-generating depression and the zone of oil and gas enrichment, and the third-or fourth-order sh...
THE THREE-DIMENSIONAL FINITE ELEMENT NUMERICAL SIMULATION OF MODERN STRESS FIELD AND ITS SIGNIFICANCE IN THE OIL DEVELOPMENT OF THE JING'AN AREA IN THE CENTRAL SHAANXI-GANSU-NINGXIA BASIN
Zeng Lianbo, Xiao Shurong, Luo Anxiang
1998, 4(3): 58-63.
Abstract (235) PDF (268KB)(12)
Abstract:
On the basis of the establishment of geological, mechanical and computation models for the Jing'an area, the spatial distribution of modern stress field in the Yanchang Series of Triassic System in the area has been studied by the three-dimensinal finite element method. The results will have an impo...
CHARACTERISTICS OF CAP ROCKS IN CUOQIN BASIN,TIBET
Song Quanyou, Chen Qinghua, Chen Shuping
1998, 4(3): 64-69.
Abstract (209) PDF (242KB)(6)
Abstract:
China National Petroleum Corporation has conducted petroleum exploration in Qinghai-Tibetan Plateau since 1994.Several sets of source rocks have been discovered after 4 years' geological reconnaissance in the Cuoqin Basin of northern Qinghai-Tibetan Plateau.The cap rocks essential to the oil and gas...
FRACTURES PREDICTION OF MAIN RESERVOIR BED IN KEERKANG OILFIELD OF ZHANGQIANG DEPRESSION IN WESTERN LIAONING PROVINCE
Zhou Xingui, Sun Baoshan, Li Yaohui
1998, 4(3): 70-75.
Abstract (234) PDF (272KB)(6)
Abstract:
The development and distribution of fractures in the main reservoir bed-Shaha Formation-at Keerkang Oilfield of Zhangqiang Depression are studied by means of F-index method based on observations of core fractures and stress field modelling. An evaluation of the fracture development in different area...
GEOCHEMISTRY OF THE EARLY CARBONIFEROUS WUSU VOLCANIC,MOJIANG COUNTY,YUNNAN, AND ITS TECTONIC SIGNIFICANCE
Han Song, Qian Qing, Xu Ping, Jia Xiuqing
1998, 4(3): 76-83.
Abstract (192) PDF (349KB)(5)
Abstract:
The Wusu volcanics,west of the Ailaoshan Suture Zone,are located in the Simao Massif.They are composed of basalt,pillow lava,dacite,rhyolite and tuff,about 800m thick,occurring in the early Carboniferous sequence.As compared to N-MORB,the Wusu basalt has a higher content of TiO2 and REE,and higher T...
GOLD MINERALIZATION ALONG THE JIGUANSHAN FAULT IN MESOZOIC VOLCANIC ROCK AREA,WESTERN LIAONINIG PROVINCE
Tian Xiaojuan, Meng Xiangang, Chen Hongxin, Qu Wei, Chen Zhengle
1998, 4(3): 84-90.
Abstract (379) PDF (304KB)(6)
Abstract:
The rhyolitic volcanic rocks erupted during 167-135Ma in Erdaogou area,Beipiao County,and emplacement of the South Jinchanggouliang granitic stock and Duimiangou porphyritic granodioritic stock took place during 128Ma and 126-121Ma to the two sides of the area.The Jinchanggouliang,Erdaogou and Chang...
DETERMINATION OF ROCK DEFORMATION BASED ON ANALYSIS OF IMAGES OF MICROSTRUCTURES
Shi Lei, Huang Weiping, Meng Xiangang
1998, 4(3): 91-96.
Abstract (174) PDF (242KB)(6)
Abstract:
From the mathematical statistics of the images of such microstructures as pressure shadow,subgrain,dislocation,dynamic recrystallization grain,one can infer the environment including the state of stress under which the rocks were deformed.

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