Journal of Chengdu University of Technology 

About: Journal of Chengdu University of Technology is an academic journal. The journal publishes majorly in the area(s): Facies & Sedimentary rock. Over the lifetime, 708 publications have been published receiving 2202 citations.

Xingkai taphrogenesis and petroleum exploration from Upper Sinian to Cambrian Strata in Sichuan Basin,China

Abstract: The present paper approaches the effects of the Xingkai taphrogenesis on the Upper Sinian to Cambrian oil and gas accumulation in Sichuan Basin.Based on the theory of the Xingkai taphrogenesis,the present paper analyzes the evolutionary process of the Mianyang-Lezhi-LongchangChangning intracratonic sag and its control on the Upper Sinian to Cambrian petroleum geological conditions.The evolutionary process of the intracratonic sag can be divided into the pregnant stage of extension(uplifting and eroding)at the end of the Late Sinian Dengying period,the beginning stage of extension at the Early Cambrian Maidiping period,the summit stage of extension at the Early Cambrian Qiongzhusi period,the decreasing stage of extension at the Early Cambrian Canglangpu period,and the dispersal stage of extension at the Early Cambrian Longwangmiao period.The process has controlled the superior source rock development of the Lower Cambrian Qiongzhusi Formation,the superior reservoir development and preservation of the Upper Sinian and Lower Cambrian strata,and the formation of the petroleum conduit system.There are probably groups of the Upper Sinian and Lower Cambrian large natural gas fields(including shale gas)within and surrounding the Mianyang-Lezhi-Longchang-Changning intracratonic sag in Sichuan Basin.

The distribution, causes and effects of damming landslides in china

Abstract: Landslide dams are very common in China They are blocking or ever blocked the rivers and streams completely or partly, and form natural lakes The studies to date have concentrated mainly on the identification of both the existing and former landslide dams and natural lakes in China Now more than 160 damming landslides in China are recognized On the basis of these cases, the distribution of damming landslides is described, together with specific examples Their hazards as a result of the landslide itself, or the burst of the natural dam and the causes triggering damming of rivers are presented The characteristics of the lakes and dams are also discussed in this paper

Formation mechanism of authigenic chlorite and relation to preservation of porosity in nonmarine Triassic reservoir sandstones, Ordos Basin and Sichuan Basin, China

Abstract: The occurrence and formation mechanism of authigenic chlorite are studied in this paper. The cases are from Upper Triassic nonmarine reservoir sandstones of Ordos Basin and Sichuan Basin, China. Pore lining and grain coating are the most important occurrences of chlorite, which are similar to the (marine) sandstones reported by published literature. Chlorite precipitation occurred at the early stage of (diagenesis), but continued chlorite growth would have been localized on existing chlorite surfaces. This (occurrence) of chlorite plays an important role in protection of porosity in deeply buried reservoir sandstones by the following mechanism: (1) the pore lining and grain-coating chlorite and its overgrowth during buried diagenesis have enhanced the mechanical strength of rocks and ability of resistant to compaction; (2) the chlorite isolates detrital quartz surfaces from contact with pore water, thus preventing nucleation of authigenie quartz and consequently preserving pores in sandstone. It has been found that more authigenic chlorites are distributed in the propulsive delta environment, especially the delta front in the setting of lakes. This shows that Mesozoic-Cenozoic lakes in China are not really freshwater lakes. They have more or less salinity and some successive character for ocean-origin fluid.

Tectonic evolution and sequence stratigraphic framework in South China during Caledonian

Abstract: During Caledonian,the plates were active in South China,and a complete basin evolution cycle from passive continental marginal basin to foreland basin was finished.However,the Yunan movement occurred in lately Cambrian-early Ordovician finished the basin character change, and in space,the basin evolution character was from southeast to northwest.The Caledonian orogenic movement occurred in late Silurian resulted in the combination of Yangtze Landmass and Cathaysia along the Jiangshan-Shaoxing fault zone,and the wide South China fold belt formed in this process.Hereby,the authors classify it as one Ⅰsequence,and then,according to different periods and the difference of evolution stage and basin type,the oneⅠsequence is divided into seven Ⅱ sequences.Among them,Ⅱ sequence SS1 reflects the initial developed stage of the passive continental margin basin in South China,Ⅱ sequence SS2~SS5 represent the passive continental margin basin from developing stage to mature stage,respectively,Ⅱ sequence SS6 reflects the transition process that South China evolved from passive continental margin basin to foreland basin,and Ⅱ sequence SS7 reflects the initial foreland basin stage of South China.

The Wenchuan earthquake occurrence background in deep structure and dynamics of lithosphere

Abstract: Because the western region of China is pushed and pressed to the north by the Indian plate,the Qinghai-Tibet Plateau is extensively deformed,and strong earthquakes occur frequently on the active faults in the plateau interior and on its margin.This is a most active earthquake area in the intracontinent.The M=8.0 Wenchuan earthquake occurs in the main central fault zone of the Longmen Mountains belt tending towards NE.The main central fault zone separates the Songpan-Ganzi block and the Yangtze block on the east margin of the Qinghai-Tibet Plateau.This paper uses the results of the surface wave tomographic image,the passive seismological experiment profile and the explosive seismic profile across the Longmen Mountains to research the lithosphere structure and dynamic characteristics of the Songpan-Ganzi block and the Yangtze block.It is discovered that there is a significant difference in the lithosphere structure and the nature between the two blocks.The lithosphere of the Yangtze block has characteristics of high speed,firmness and stable state,but that of the Songpan-Ganzi block has characteristics of low speed,brittleness and easy break.Generally,a low velocity layer exists in the middle crust of the Songpan-Ganzi block.It is the slipping layer to push the upper and middle crust upthrust movement to form the Longmen Mountains belt.The depth of the main shock is 14 km,and the hypocenter is just located in the Yingxiu-Beichuan central fault zone.