1983 Vol. 1, No. 2
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Display Method:
1983, 1(2): 1-16.
Abstract:
The Qomolangma region covers the area from Jirong to Gamba in the south of the Himalayan fauit. The welldeveloped Jurassic strata in this area are com-pietely exposed.and their total thickness is 4500m.This region belonged to a passive continental margin environment adjacent to Indian Plate during the Ju-rassic period, with active depositional setting,variedtypes,great thickness and rapid facies change.
The Qomolangma region covers the area from Jirong to Gamba in the south of the Himalayan fauit. The welldeveloped Jurassic strata in this area are com-pietely exposed.and their total thickness is 4500m.This region belonged to a passive continental margin environment adjacent to Indian Plate during the Ju-rassic period, with active depositional setting,variedtypes,great thickness and rapid facies change.
1983, 1(2): 31-46.
Abstract:
According to the threefold meaning of rock一paragenesis suggested by the author and based on the material source ,environment and energy- equilibrium，the phosphatie formation in the eastern part of China 560-700 Ma has been div-ided into mono-terrestrial formation.tele-siliceous formation and silice ous shale formation ,all belonging to stable type，substable type and unstable type forma-lions, respectiveli.
According to the threefold meaning of rock一paragenesis suggested by the author and based on the material source ,environment and energy- equilibrium，the phosphatie formation in the eastern part of China 560-700 Ma has been div-ided into mono-terrestrial formation.tele-siliceous formation and silice ous shale formation ,all belonging to stable type，substable type and unstable type forma-lions, respectiveli.
1983, 1(2): 60-72.
Abstract:
The distributions of the recent barrier一lagoon coasts are widespread in the world.Offshore barriers and lagoons are interdependent and interact on each other, thus forming unified sedimentary systems.The barrier-lagoon sedimentary systems in the coastal zone from Luanhe river mouth to Caofeidian，Hebei Pro- wince, are of different types and develop at different stages, which provides favourable conditions for the study of the coastal sediments of this kind.
The distributions of the recent barrier一lagoon coasts are widespread in the world.Offshore barriers and lagoons are interdependent and interact on each other, thus forming unified sedimentary systems.The barrier-lagoon sedimentary systems in the coastal zone from Luanhe river mouth to Caofeidian，Hebei Pro- wince, are of different types and develop at different stages, which provides favourable conditions for the study of the coastal sediments of this kind.
1983, 1(2): 84-95.
Abstract:
The ancient Devonian sea area in Guizhou province belongs toepicontinen-tal sea in character, and the carbonate deposits are well-developed. Based on the rock texture, sedim entary structure, biological rise m blages and ecology as well as facies minerals, in energy and tidal action, and the light of paleogeographical position, sea一water reference to the patterns of Irwin(1965)， Laporte(1967)and Wilson(1975)， the general pattern of its sedicnentary en vi-ronment consists of three facies regions, sie facies belts and thirteen facies.T he littoral facies region comprises facies region includes platform supratidal belt and intertidal belt,subshallow sea facics belt and platform consists of basin marginal facies and abyssal and shallo w -sea facies region continental shore facies belt. fades belt and belt, open
The ancient Devonian sea area in Guizhou province belongs toepicontinen-tal sea in character, and the carbonate deposits are well-developed. Based on the rock texture, sedim entary structure, biological rise m blages and ecology as well as facies minerals, in energy and tidal action, and the light of paleogeographical position, sea一water reference to the patterns of Irwin(1965)， Laporte(1967)and Wilson(1975)， the general pattern of its sedicnentary en vi-ronment consists of three facies regions, sie facies belts and thirteen facies.T he littoral facies region comprises facies region includes platform supratidal belt and intertidal belt,subshallow sea facics belt and platform consists of basin marginal facies and abyssal and shallo w -sea facies region continental shore facies belt. fades belt and belt, open
1983, 1(2): 106-117.
Abstract:
The Sichuan Basin is a giant subsidence basin with an area of 157.000km2 on the Yangtzi sub-platform.The basement of the basin is composed the sli-ghtly metamorphic rocks and magmatic rocks of the lower Proterozoic.The covering rocks with a thickness of 5000-11000 m consist of the Sinian一Triassic marine carbonate formation in predominance and the Jurassic一Cretaceous redterrigeenous detrital formation.
The Sichuan Basin is a giant subsidence basin with an area of 157.000km2 on the Yangtzi sub-platform.The basement of the basin is composed the sli-ghtly metamorphic rocks and magmatic rocks of the lower Proterozoic.The covering rocks with a thickness of 5000-11000 m consist of the Sinian一Triassic marine carbonate formation in predominance and the Jurassic一Cretaceous redterrigeenous detrital formation.
1983, 1(2): 131-142.
Abstract:
characteristics of the studied area. Excess 230Th concentrations in the uppermost layer(1mm) of the crust indicate an upper limit of growth rate of 4 .1 mm/l08yr. This rate of accreti一on for the crust is similar to that for 6A nodule sample from the easter part of the Pacific Ocean.Uniform and low rates of the crust growth from the South China Sea and th nodules forom various oceanic basins suggest that a similar controlling mechanism may take place during their formations in the marine environment.
characteristics of the studied area. Excess 230Th concentrations in the uppermost layer(1mm) of the crust indicate an upper limit of growth rate of 4 .1 mm/l08yr. This rate of accreti一on for the crust is similar to that for 6A nodule sample from the easter part of the Pacific Ocean.Uniform and low rates of the crust growth from the South China Sea and th nodules forom various oceanic basins suggest that a similar controlling mechanism may take place during their formations in the marine environment.
1983, 1(2): 153-165.
Abstract:
The most difficulty in the determination of sedimentary rocks with lmage Analyser lies in that Gradation Level Automatic Detection may be ineffective for most minerals.
The most difficulty in the determination of sedimentary rocks with lmage Analyser lies in that Gradation Level Automatic Detection may be ineffective for most minerals.
1983, 1(2): 17-30.
Abstract:
Anhui Province is rich in coal resources with great varieties .With a view to exploring the latency of gasified coal accumulation in the coal-bearing basin, stress is laid on the analysis of organic geochemical characteristics of the coal species concerned (Table 1,Figs.1-11) so that the entire process of coal formation is generally divided into four stages.
Anhui Province is rich in coal resources with great varieties .With a view to exploring the latency of gasified coal accumulation in the coal-bearing basin, stress is laid on the analysis of organic geochemical characteristics of the coal species concerned (Table 1,Figs.1-11) so that the entire process of coal formation is generally divided into four stages.
1983, 1(2): 47-59.
Abstract:
Four cheniers exist in the northern coastal plain of Jiangsu Province,name-ly the Nest Ridge，the Middle Ridge，the East Ridge and tile dew Ridge in orde from west to east.They run nearly parallel to the present shoreline.The chiea depositional features of the cheniers are as follows.
Four cheniers exist in the northern coastal plain of Jiangsu Province,name-ly the Nest Ridge，the Middle Ridge，the East Ridge and tile dew Ridge in orde from west to east.They run nearly parallel to the present shoreline.The chiea depositional features of the cheniers are as follows.
1983, 1(2): 73-83.
Abstract:
Oolites are common grains in carbonatites, and their tenure changes arc important indicators in studying the property- and strength of diagenesis.It has been found that splits and deformed oolites formed under compaction, and the sutured tcature and the pressure shadow as }s-ell as recrystallization and dolo- mitiz anon formed under pressure solution are related to the property and st- rength of diagenesis.
Oolites are common grains in carbonatites, and their tenure changes arc important indicators in studying the property- and strength of diagenesis.It has been found that splits and deformed oolites formed under compaction, and the sutured tcature and the pressure shadow as }s-ell as recrystallization and dolo- mitiz anon formed under pressure solution are related to the property and st- rength of diagenesis.
1983, 1(2): 96-105.
Abstract:
The present paper deals with the paleoecology using the fossils of ostraco-da,algae,pelecypoda and fishes from more than dozen cores in Beijing-Tianjin-Baaian area.according to the eculogical characteristcs and geochemical norms,the late IJocene and early Oligocene sediments are divided into the"ecological facies groups"and the "ecologicalsequence groups",and the depositional environ- went in this area are reconstructed.
The present paper deals with the paleoecology using the fossils of ostraco-da,algae,pelecypoda and fishes from more than dozen cores in Beijing-Tianjin-Baaian area.according to the eculogical characteristcs and geochemical norms,the late IJocene and early Oligocene sediments are divided into the"ecological facies groups"and the "ecologicalsequence groups",and the depositional environ- went in this area are reconstructed.
1983, 1(2): 118-130.
Abstract:
The surficial sediments silts and silty muds.The regression equation between organic and cl-ay minerals is
The surficial sediments silts and silty muds.The regression equation between organic and cl-ay minerals is
1983, 1(2): 143-152.
Abstract:
In this paper the paleotemperature in the BZ area of Tarim Basin is studi一ed and its geological model is temperature at lhc end of the made.There was a local thermal alteration at high Paleozoic as a result of a large scale igneous ro-ck intrusion, w hereas the gradients of paleotem peratures of the tum and Cenozoic stratum are lower in this area.Although Mesozoic sira-crude oil from Z一1 well is produced from the lower Carboniferous system, its source rock seems to be middle一upper Carboniferous carbonate distributed in the southern BZ area.The result calculated from TTf value shows that the source roc's Su-tied within 3000-6000 metre deep are still at their main oil一forming stage.
In this paper the paleotemperature in the BZ area of Tarim Basin is studi一ed and its geological model is temperature at lhc end of the made.There was a local thermal alteration at high Paleozoic as a result of a large scale igneous ro-ck intrusion, w hereas the gradients of paleotem peratures of the tum and Cenozoic stratum are lower in this area.Although Mesozoic sira-crude oil from Z一1 well is produced from the lower Carboniferous system, its source rock seems to be middle一upper Carboniferous carbonate distributed in the southern BZ area.The result calculated from TTf value shows that the source roc's Su-tied within 3000-6000 metre deep are still at their main oil一forming stage.
1983, 1(2): 166-171.
Abstract:
This paper deals with the nature of cathodoluminescence investigations of quartz-bearing rocks. There are three types of luminescence quartz: "violet"， brown and non-luminescent, representing the characteristics of rocks with dis- tinct temperature history i. e. "violet" luminescent quartz in igneous rocks,br- own luminescent quartz in regional metamorphic rocks, and non-luminescent qu- artz formed diagenetically in sediments.
This paper deals with the nature of cathodoluminescence investigations of quartz-bearing rocks. There are three types of luminescence quartz: "violet"， brown and non-luminescent, representing the characteristics of rocks with dis- tinct temperature history i. e. "violet" luminescent quartz in igneous rocks,br- own luminescent quartz in regional metamorphic rocks, and non-luminescent qu- artz formed diagenetically in sediments.
