The Gas Resources Assessment Expert System of the Songliao Basin

The gas resources assessment expert system is one of the advanced methods for appraising oil and gas resources. The establishment of a knowledge base is the focal task in developing the expert system. This paper presents a summary of the mechanism and the major controlling factors in the formation of gas pools in the southeast uplift of the Songliao basin. Then an appropriate assessment model is established for trapping the gas resources and a knowledge base built in the expert system to realize the model. By using the expert system to appraise the gas-bearing probability of 25 major traps of the Quantou and Denglouku Formations in the Shiwu-Dehui area, the authors have proved that the expert system is suitable for appraising traps in the Songliao basin and similar basins.     

TWO EPISODES OF MONAZITE CRYSTALLIZATION DURING METAMORPHISM AND CRUSTAL MELTING IN THE EVEREST REGION OF THE NEPALESE HIMALAYA

TWO EPISODES OF MONAZITE CRYSTALLIZATION DURING METAMORPHISM AND CRUSTAL MELTING IN THE EVEREST REGION OF THE NEPALESE HIMALAYA     

CROSS-SECTIONS OF THE WESTERN HIMALAYAN FOOTHILLS:PROBLEMS IN RESTORATION AND IMPLICATIONS FOR CRUSTAL SHORTENING

CROSS-SECTIONS OF THE WESTERN HIMALAYAN FOOTHILLS:PROBLEMS IN RESTORATION AND IMPLICATIONS FOR CRUSTAL SHORTENING1　PowersPM ,LillieRJ ,YeatsRS .StructureandshorteningoftheKangraandDehraDunreentrants ,Sub Himalaya ,India[J].GSABulletin ,1998,110 :10 10～ 10 2 7.…     

KINEMATICS OF QUATERNARY EXTENSION IN THE PAMIR

KINEMATICS OF QUATERNARY EXTENSION IN THE PAMIR1　BurtmanVS ,MolnarP .GeologicalandgeophysicalevidencefordeepsubductionofcontinentalcrustbeneaththePamir[J].SpecPapGeolSocAm ,1993,2 81:76 . 2　StreckerMR ,FrischW ,HamburgerMW ,etal.QuaternarydeformationintheEasternPamirs ,TadzhikistanandKyrgyzs tan[J].Tectonics,1995 ,14(5 ) :10 6 1～ 10 79.…     

YARLUNG ZANGBO OPHIOLITES,SOUTHERN TIBET REVISITED

YARLUNG ZANGBO OPHIOLITES,SOUTHERN TIBET REVISITED     

Palaeoshorelines as Indic ator of Late Cenozoic Climo-Tectonic Changes in Ladakh Trans Himalaya: an Illustration From Tso Kar Lake

PALAEOSHORELINES AS INDICATOR OF LATE CENOZOIC CLIMO-TECTONIC CHANGES IN LADAKH TRANS HIMALAYA:AN ILLUSTRATION FROM TSO KAR LAKE1　BhattacharyyaA .Vegetationandclimateduringthelast 30 0 0 0 yearsinLadakh [J] .Palaeogeogr,Palaeoclimatol,Palaeoecol,1989,73:2 5～ 38. 2　CerlingTE .LateCenozoicvegetationchange,atmosphericCO2 andtectonics[A] .Ruddiman ,W .F .,ed .Tectonicupliftandclimatechange[M] .NewYork:PlenumPress,1998.313～ 2 2 7. …     

蒂勒尼安海腐泥沉积期间的海水表面淡化、生产力提高和有机物保存能力提高的同位素证据

腐泥的复合层是富有机碳的深色沉积物 ,为地中海上新世—更新世沉积记录中特有的沉积特征。这些层位特别引人关注是因为 :⑴现代地中海的生物生产力通常很低 ;⑵大洋中大部分有机物的最终结局是被氧化了和侵蚀了 ,而并非在海洋地层中聚集下来。因此腐泥记录了与目前这个大的半封闭海环境明显不同的古环境条件下有机物的生产和保存。解释深海腐泥各种成因的假设包括海洋原始生产力的提高。有机物供给的增加、海底缺氧和有机物保存能力增强。通常 ,这种解释认为腐泥与地球轨道运行周期最小值一致 ,后者是季节性变化增强的周期 ,并且腐泥的出现…     

Dyke emplacement in the Narmada rift zone and implications for the evolution of Deccan Traps

正Dykes are primarily extensional fractures that form perpendicular to the minimum principal compressive stress,which have been extensively studied in the world during the past decades for various reasons including the