1997 Vol. 3, No. 2

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THE GEOLOGICAL EFFECT OF RIDGE SUBDUCTION IN ARC AREA
Zhang Jian, Shi Yaolin
1997, 3(2): 1-10.
Abstract (239) PDF (402KB)(9)
Abstract:
Ridge subduction is an important stage of Wilson cycle.If the spreading rate of the active ridge is smaller than the rate of subduction,the subducting oceanic plate will decrease in size,and the ridge itself will be eventually subducted.There are four possible kinematic scenarios of ridge subduction...
THE HIGH-RESOLUTION LATE PLEISTOCENE LOESS STRATIGRAPHY IN TAOHUAYU,MANGSHAN,ZHENGZHOU
Jiang Fuchu, Wu Xihao, Xiao Huaguo, Wang Sumin, Xue Bin
1997, 3(2): 11-17.
Abstract (220) PDF (336KB)(9)
Abstract:
For its characteristic high-resolution the eolian Manshan loess is exposed along the south bank of Huanghe River,situated on the northwest suburbs of Zhengzhou City,Henan Province,which is wholly composed of loess strata,over 160 m thick,upward from loess L15 or paleosol WS1.The loess sequence in th...
QUATERNARY GLACIATION IN SHENNONGJIA
Zhao Zhizhong, He Peiyuan
1997, 3(2): 18-23.
Abstract (278) PDF (240KB)(7)
Abstract:
Shennongjia located in central China is an important area to study Quaternary geology.Based on the distribution of glacial vestiges,we make a discussion of the Shennongjia Quaternary glaciation.There are three glacial substages,i.e.Songbai glaciation,Muyu glaciation,Longtan glaciation,and two epigla...
DISCUSSION ON THE EFFECTIVE ELASTIC MODULI IN THE UNSYNMMETRICAL MULTI-LAYER PLATE
Wu Hongling
1997, 3(2): 24-32.
Abstract (186) PDF (330KB)(9)
Abstract:
In order to adapt plate and shell models in applying the finite element method to tectonic analysis problems in representing crustal layer,this paper relaxes the synmmetrical restrictions on the geometry and elasticity in the multi-layered structure.According to the effective principle we re-determi...
A THREE DIMENSINAL ELASTOPLASTIC FINITE ELEMENT MODEL FOR PREDICTING DYNAMICALLY RESERVOIR EFFECTIVE STRESS
Ran Qiquan, Gu Xiaoyun
1997, 3(2): 33-40.
Abstract (196) PDF (297KB)(8)
Abstract:
A three dimensinal elastoplastic model for predicting dynamically reservoir effective stress is established based on the coupled interaction mechanism of reservoir stress and multiphase fluid flow.The model is characteristic of two important aspects:the coupled effect of stress and seepage,and the e...
THE ROLE AND SIGNIFICANCE OF CRUSTAL STRESS IN PETROLEUM GEOLOGY AND ITS PRESENT SITUATION
Ma Yinsheng
1997, 3(2): 41-46.
Abstract (516) PDF (238KB)(25)
Abstract:
The author discusses the role of crustal stress and its significance in petroleum geology from four aspects:crustal stress and the formation and evolution of oil-bearing basins,crustal stress and the structures of the basins,crustal stress and the migration of oil and gas,and crustal stress and the ...
THE STUDY OF FAULT CLOSURE BY USE OF ENTRY PRESSURE AND ITS APPLICATION IN NORTH TARIM
Zhou Xingui
1997, 3(2): 47-53.
Abstract (275) PDF (300KB)(10)
Abstract:
The entry pressure is the minimum driving force which is responsible for oil and gas secondary migration and also major index that measures the secondary migration and the blocking capability of a fault.Opening and closing of a fault depends on the difference of the entry pressure in the fault zone ...
SEGMENTATION OF THE SHAOWU-HEYUAN FAULT ZONE AND THEIR ACTIVITY ASSESSMENT
Liu Daren
1997, 3(2): 54-60.
Abstract (532) PDF (330KB)(31)
Abstract:
The Shaowu-Heyuan active fault zone bordering Fujian,Jiangxi and Guangdong Provinces,forms the west boundary of the sub-seismic zone of the southeast coastal area of China.It includes three sub-zones different in geometry and features.They are the northern Shaowu-Shicheng Fault Zone,the central Ruij...
A STUDY OF INTRUSIVE CONTACT STRUCTURES
Yi Shunhua, Li Zhen
1997, 3(2): 61-65.
Abstract (190) PDF (278KB)(16)
Abstract:
This paper gives the major conclusions of intrusive contact structures achieved by authors by applying the theory and methods of geomechanics:(1) the intrusive contact structures themselves form a system which,falling into three basic types,results from the combined action of the emplacement of intr...
TECTONIC DEFORMATION AND GOLD MINERALIZATION IN ZHAOYUAN-YEXIAN AREA,SHANDONG PROVINCE
Zhu Dagang
1997, 3(2): 66-72.
Abstract (237) PDF (300KB)(11)
Abstract:
The geology of the Linglong-Jiaojia type gold deposits in Zhaoyuan-Yexian gold belt,Shandong Province,is discussed in this paper.The stress is laid on the characteristic features of the ore-controlling fault in the gold belts.The role of the ductile-brittle faults in the gold mineralization at diffe...
DEFORMATION FEATURES OF CHONGLI-LONGHUA-FUXIN STRUCTURAL ZONE AND ITS CONTROL OF MINERALIZATION
Wu Zhenhan
1997, 3(2): 73-81.
Abstract (209) PDF (370KB)(7)
Abstract:
The Chongli-Longhua-Fuxin structural zone is of importance controlling magma intrusion and gold mineralization in the northern Yashan area.In late Variscan-Indosinian stage,it was dominated by ductile shearing and formed a series of discontinuous east-west trending ductile shear zones.In Ysashanian ...
ORE-CONTROLLING STRUCTURE IN THE PLOY-METALLIC ORE DEPOSITS IN SHALIUHENANQU,DULAN,QINGHAI PROVINCE
Cheng Zhengle, Zhou Xianqiang, Song Yougui
1997, 3(2): 82-89.
Abstract (226) PDF (327KB)(13)
Abstract:
Based on the study of the mega and micro ore-controlling structures in the polymetallic ore deposits in Shaliuhenanqu,Dulan,Qinghai Province,the deformation histories of variously trending structures were determined:E-W-trending structure experienced at least three stages of deformation,the NW-trend...
STUDY OF THE PROPERTIES OF SYNTECTONIC PORPHYROBLASTS IN DABEIWU AREA,JIANGXI PROVINCE
Chen Bailin, Dong Faxian
1997, 3(2): 90-97.
Abstract (149) PDF (421KB)(7)
Abstract:
The syntectonic porphyroblasts of pyrite and siderite in the ductile shear zone developed in epimetamorphic clastic rocks in Dabeiwu area are the products and marks of ductile shear deformation during progressive metamorphism.The porphyroblasts being of syntectonic origin have attained the following...

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