As such in any industrial raw material site characterization study, making a lithological evaluation for cement raw materials includes a description of physical characteristics as well as grain size and chemical compo...As such in any industrial raw material site characterization study, making a lithological evaluation for cement raw materials includes a description of physical characteristics as well as grain size and chemical composition. For providing the cement components in accordance with the specifications required, making the classification of the cement raw material pit is needed. To make this identification in a spatial system at a quarry stage, the supervised pattern recognition analysis has been performed. By using four discriminant analysis algorithms, lithological classifications at three levels, which are with limestone, marly-limestone (calcareous marl) and marl, have been made based on the main chemical components such as calcium oxide (CaO), alumina (Al2O3), silica (SiO2), and iron (Fe2O3). The results show that discriminant algorithms can be used as strong classifiers in cement quarry identification. It has also recorded that the conditional and mixed classifiers perform better than the conventional discriminant algorithms.展开更多
This study for the first time demonstrates that some of the so-called clay-sized mudstones observed by the naked eye,such as clay-sized black mudstones and clay-sized oil shales,which are rich in black organic matter(...This study for the first time demonstrates that some of the so-called clay-sized mudstones observed by the naked eye,such as clay-sized black mudstones and clay-sized oil shales,which are rich in black organic matter(including oil and asphaltene),in the Chang 73 Submember of the Upper Triassic Yanchang Formation in the Ordos Basin of China are actually clay-sized tuffaceous rocks(including tuff,sedimentary tuff and tuffaceous sedimentary rock)with high hydrocarbon generation capacities.Thus,these rocks can be defined as clay-sized tuffaceous source rocks.Identification of this lithology has important theoretical and practical significance for the exploration and development of shale oil in the Chang 7 Member.Through the macroscopic observation of drill cores and outcrop profiles,microscopic observation of electron probe thin sections and whole-rock inorganic geochemical analysis(including major,trace and rare earth elements),this work demonstrates that the organic matter-rich clay-sized tuffaceous rocks,especially clay-sized tuffs,have the following characteristics.First,the clay-sized tuffaceous rocks with little black organic matter are mainly greyish white,yellowish brown and purplish grey,and mixed colors occur in areas with strong bentonite lithification.Second,the clay-sized tuffaceous rocks have experienced strong devitrification and recrystallization,forming abundant flaky aluminosilicate minerals with directional arrangement.In thin sections under a polarizing microscope,the interference colors generally show regular alternation between the lowest interference color of first-order yellow and the highest interference color of second-order blue-green.Third,the rock samples plot in the igneous rock field in the TiO2-SiO2 cross-plot and exhibit similar trace element and rare earth element patterns on spider diagrams,indicating that the samples are derived from the same source.The results prove that clay-sized tuffaceous rocks may be widespread in the Chang 73 Submember of the Upper Triassic Yanchang Formation in the Ordos Basin,China.展开更多
The Qikou sag is the largest hydrocarbon-rich sag in the central Huanghua depression of Bohaiwan basin.It formed as a result of Tertiary rifting and was mainly filled with Cenozoic siliciclastic sediments about 8000-1...The Qikou sag is the largest hydrocarbon-rich sag in the central Huanghua depression of Bohaiwan basin.It formed as a result of Tertiary rifting and was mainly filled with Cenozoic siliciclastic sediments about 8000-10000 m thick.The petroleum exploration of Binhai district in Qikou sag hardly gained breakthrough all through because of previous ambiguous understanding of spatial and temporal patterns展开更多
Based on the specialty of major rock-forning minerals and elementary composition of metamorphite,the detailed and systematical review,analysis and summary are completed for a series of lithology and reservoir fracture...Based on the specialty of major rock-forning minerals and elementary composition of metamorphite,the detailed and systematical review,analysis and summary are completed for a series of lithology and reservoir fracture identification teehnologies with logging that are recent years.Research shows that nuclear logging series in conventional logging are more favorable to identify the metanorphie lithology.ECS(elemental capturespectrosoopy)and other new logging lechnologies can be applied to identify metamorphic lithology.Due to theolex and di-verse metamorphic lithologies,the correspending reservoir identification standard should be established for metamorphic reservoir identificat lithology identification,The applicable conventional logging methods for metamorphic reservoir fracture identification mainly incldle dual lat ging,scoustic logging,dual lateral logging-microspherical focus,borehole diameter logging,natural gamma ray spectrology baging,etc.In additie acoustic-resistivity imaging logging,multipolar array acoustic logging,cross dipole acoustic logging and other new logging tec nologies with unique ad-vantages are increasingly applied for metamorphic reservoir fractureidentification.Currently,there are no gener appli sandards for logging i-dentification of metamorphic lithology and reservoir fracture.The specific metamorphic reservoir development a field actual data in specific ar-eas should be considered to study the logging identification and evaluation.展开更多
The complex investigation of the Bathonian sedimentary deposits in central regions of the WestSiberian basin was done.On the basis both of lithofacial analysis of core clefts and the geophysical investigation data and...The complex investigation of the Bathonian sedimentary deposits in central regions of the WestSiberian basin was done.On the basis both of lithofacial analysis of core clefts and the geophysical investigation data and taking into account the tectonic features of the Jurassic structural storey the sedimenttological model of deposits was built and the main regularities of its building were identified.At the initial stage the framework of alluvial lower plain展开更多
The synorogenic sediments in the foreland basins preserve a potential record of varied depositional environments that respond to and are largely controlled by tectonic events of the mountain along the basin margin. In...The synorogenic sediments in the foreland basins preserve a potential record of varied depositional environments that respond to and are largely controlled by tectonic events of the mountain along the basin margin. In the exploration of the uplift process of the Qinghai—Tibet Plateau, research on the foreland basins around the plateau is of vital significance. Much work have been carried out on the southern margin along the Himalayas and on the eastern margin, however, seldom work was reported along the northern boundary of the plateau, this have blocked the generation of an integrative image of the evolution of the entire plateau. The Gansu Corridor, located on the northeast margin of the Qinghai—Tibet Plateau, is a Cenozoic foreland basin system formed due to the northward overthrust and overload of the plateau. Thousand of meters detrital sediments derived mainly from denudation of the Qilian orogen have deposited in the basin since Oligocene. Here we report a detailed lithologic and magnetostratigraphic work carried out on the late Cenozoic sedimentary sequences in the Jiuxi Basin, western Gansu Corridor, to investigate the neotectonism of the western Qilian Mt.展开更多
119 Karst Springs, all with electric conductivity of less than 500 um/cm, discharging two carbonatic aquifers in Zagrosides of Iran are chosen and studied. The results indicate that the lithology of each Unit is well ...119 Karst Springs, all with electric conductivity of less than 500 um/cm, discharging two carbonatic aquifers in Zagrosides of Iran are chosen and studied. The results indicate that the lithology of each Unit is well reflected in the chemistry of springs and the overall mineralogical composition of the aquifer can successfully be reconstructed from the hydrochemistry of the springs using a mass balance approach. The comparison of the chemistry of springs reveals that the significant difference are due to the dolomitic nature of one of the studied aquifers.展开更多
文摘As such in any industrial raw material site characterization study, making a lithological evaluation for cement raw materials includes a description of physical characteristics as well as grain size and chemical composition. For providing the cement components in accordance with the specifications required, making the classification of the cement raw material pit is needed. To make this identification in a spatial system at a quarry stage, the supervised pattern recognition analysis has been performed. By using four discriminant analysis algorithms, lithological classifications at three levels, which are with limestone, marly-limestone (calcareous marl) and marl, have been made based on the main chemical components such as calcium oxide (CaO), alumina (Al2O3), silica (SiO2), and iron (Fe2O3). The results show that discriminant algorithms can be used as strong classifiers in cement quarry identification. It has also recorded that the conditional and mixed classifiers perform better than the conventional discriminant algorithms.
基金Project(18GK28)supported by the Doctoral Scientific Research Staring Foundation for Yulin University,ChinaProject(20106101110020)supported by the University Research Fund of Science and Technology Development Center of Ministry of Education,ChinaProject(BJ08133-3)supported by the Key Fund Project of Continental Dynamics National Key Laboratory of Northwest University,China。
文摘This study for the first time demonstrates that some of the so-called clay-sized mudstones observed by the naked eye,such as clay-sized black mudstones and clay-sized oil shales,which are rich in black organic matter(including oil and asphaltene),in the Chang 73 Submember of the Upper Triassic Yanchang Formation in the Ordos Basin of China are actually clay-sized tuffaceous rocks(including tuff,sedimentary tuff and tuffaceous sedimentary rock)with high hydrocarbon generation capacities.Thus,these rocks can be defined as clay-sized tuffaceous source rocks.Identification of this lithology has important theoretical and practical significance for the exploration and development of shale oil in the Chang 7 Member.Through the macroscopic observation of drill cores and outcrop profiles,microscopic observation of electron probe thin sections and whole-rock inorganic geochemical analysis(including major,trace and rare earth elements),this work demonstrates that the organic matter-rich clay-sized tuffaceous rocks,especially clay-sized tuffs,have the following characteristics.First,the clay-sized tuffaceous rocks with little black organic matter are mainly greyish white,yellowish brown and purplish grey,and mixed colors occur in areas with strong bentonite lithification.Second,the clay-sized tuffaceous rocks have experienced strong devitrification and recrystallization,forming abundant flaky aluminosilicate minerals with directional arrangement.In thin sections under a polarizing microscope,the interference colors generally show regular alternation between the lowest interference color of first-order yellow and the highest interference color of second-order blue-green.Third,the rock samples plot in the igneous rock field in the TiO2-SiO2 cross-plot and exhibit similar trace element and rare earth element patterns on spider diagrams,indicating that the samples are derived from the same source.The results prove that clay-sized tuffaceous rocks may be widespread in the Chang 73 Submember of the Upper Triassic Yanchang Formation in the Ordos Basin,China.
文摘The Qikou sag is the largest hydrocarbon-rich sag in the central Huanghua depression of Bohaiwan basin.It formed as a result of Tertiary rifting and was mainly filled with Cenozoic siliciclastic sediments about 8000-10000 m thick.The petroleum exploration of Binhai district in Qikou sag hardly gained breakthrough all through because of previous ambiguous understanding of spatial and temporal patterns
文摘Based on the specialty of major rock-forning minerals and elementary composition of metamorphite,the detailed and systematical review,analysis and summary are completed for a series of lithology and reservoir fracture identification teehnologies with logging that are recent years.Research shows that nuclear logging series in conventional logging are more favorable to identify the metanorphie lithology.ECS(elemental capturespectrosoopy)and other new logging lechnologies can be applied to identify metamorphic lithology.Due to theolex and di-verse metamorphic lithologies,the correspending reservoir identification standard should be established for metamorphic reservoir identificat lithology identification,The applicable conventional logging methods for metamorphic reservoir fracture identification mainly incldle dual lat ging,scoustic logging,dual lateral logging-microspherical focus,borehole diameter logging,natural gamma ray spectrology baging,etc.In additie acoustic-resistivity imaging logging,multipolar array acoustic logging,cross dipole acoustic logging and other new logging tec nologies with unique ad-vantages are increasingly applied for metamorphic reservoir fractureidentification.Currently,there are no gener appli sandards for logging i-dentification of metamorphic lithology and reservoir fracture.The specific metamorphic reservoir development a field actual data in specific ar-eas should be considered to study the logging identification and evaluation.
文摘The complex investigation of the Bathonian sedimentary deposits in central regions of the WestSiberian basin was done.On the basis both of lithofacial analysis of core clefts and the geophysical investigation data and taking into account the tectonic features of the Jurassic structural storey the sedimenttological model of deposits was built and the main regularities of its building were identified.At the initial stage the framework of alluvial lower plain
文摘The synorogenic sediments in the foreland basins preserve a potential record of varied depositional environments that respond to and are largely controlled by tectonic events of the mountain along the basin margin. In the exploration of the uplift process of the Qinghai—Tibet Plateau, research on the foreland basins around the plateau is of vital significance. Much work have been carried out on the southern margin along the Himalayas and on the eastern margin, however, seldom work was reported along the northern boundary of the plateau, this have blocked the generation of an integrative image of the evolution of the entire plateau. The Gansu Corridor, located on the northeast margin of the Qinghai—Tibet Plateau, is a Cenozoic foreland basin system formed due to the northward overthrust and overload of the plateau. Thousand of meters detrital sediments derived mainly from denudation of the Qilian orogen have deposited in the basin since Oligocene. Here we report a detailed lithologic and magnetostratigraphic work carried out on the late Cenozoic sedimentary sequences in the Jiuxi Basin, western Gansu Corridor, to investigate the neotectonism of the western Qilian Mt.
文摘119 Karst Springs, all with electric conductivity of less than 500 um/cm, discharging two carbonatic aquifers in Zagrosides of Iran are chosen and studied. The results indicate that the lithology of each Unit is well reflected in the chemistry of springs and the overall mineralogical composition of the aquifer can successfully be reconstructed from the hydrochemistry of the springs using a mass balance approach. The comparison of the chemistry of springs reveals that the significant difference are due to the dolomitic nature of one of the studied aquifers.
