In order to quantitatively study layerslip-dipslip, nappe-glide structure systems in the Hunan-Jiangxiareas, samples with divided layers of these classical cross sections in the studied area were selected, and various...In order to quantitatively study layerslip-dipslip, nappe-glide structure systems in the Hunan-Jiangxiareas, samples with divided layers of these classical cross sections in the studied area were selected, and various physicomechanical parameters were systematically determined. Furthermore, five regional layer-slip systems of the basement and the cover strata were scientifically divided in the Middle Yangzi area, and they have been synthetically compared with the determined parameters in the Lower Yangzi area. Overall, the parameter value of a sliplayer presenting relative plasticity, ductility and viscosity is higher than a non-slip layer presenting relative elasticity, brittleness and rigidity, except the value of the Poission's ratio of the rock and the determined temperature of the inclusion, other parameters (such as the uniaxial pressure strength of the rock, the elastic module, the density and the elastic wave velocity) are all lower. On the basis of the study, the authors still further explain a pneumatic cushion effect of the slip-layer and the research significance.展开更多
Warm and humid climate and gentle hilly topography have provided favourable conditions for the devel-opment of the weathering crust of the granite intrusions in the Longnan area, Jiangxi Province. REE is mostlyconcent...Warm and humid climate and gentle hilly topography have provided favourable conditions for the devel-opment of the weathering crust of the granite intrusions in the Longnan area, Jiangxi Province. REE is mostlyconcentrated in an adsorption state in clay in the wholly weathered zone. The rare-earth minerals enriched inthe parent rocks provided the source material for the REE enrichment. Exchangeable REE accounts for48-86%. Extraction experiments and stable isotopic study of clay minerals suggest that the downward infiltra-tion of meteoric water and increasing gradient of pH values have played an important role in the enrichment ofREE during the progressive weathering. Slight fractionation of individual REE can not change their distribu-tion patterns in the profiles. which are inherited from the parent rocks.展开更多
[Objective] The paper was to provide the scientific basis for effective monitoring and early warning on oriental fruit fly in Jiangxi Province.[Method] Using the distribution data and environmental factor data of orie...[Objective] The paper was to provide the scientific basis for effective monitoring and early warning on oriental fruit fly in Jiangxi Province.[Method] Using the distribution data and environmental factor data of oriental fruit fly,the potential distribution area of oriental fruit fly in Jiangxi Province was predicted by GARP ecological niche model.[Result]The total suitable area for oriental fruit fly in Jiangxi province was over two thirds of the whole province.Most areas in southern Jiangxi basin ranged from 24° to 26° N were the high suitable area for oriental fruit fly,where the annual average temperature was 19-20℃.Part areas in north Ganzhou and small areas in southwest Ji＇an,Wuzhou,Yingtan,southeast Shangrao ranged from 26° to 27° N were the moderate suitable areas for oriental fruit fly,where the annual average temperature was 18-19℃.The low suitable area was ranged from 26° to 30° N including Binhu,Ganjiang River,Wuhe,Yuanshui area and Southwestern Mountain of Jiangxi Province,where the annual average temperature was 17-18℃.Northeast and northwest areas in Jiangxi Province and coastal areas along the Yangtze River was predicted to be non-suitable area for oriental fruit fly,where the annual average temperature was 16-17℃.[Conclusion] The results showed that the actual distribution of oriental fruit fly basically was consistent with the distribution predicted by GARP.展开更多
基金Project supported by the National Natural Science Foundation of China.
文摘In order to quantitatively study layerslip-dipslip, nappe-glide structure systems in the Hunan-Jiangxiareas, samples with divided layers of these classical cross sections in the studied area were selected, and various physicomechanical parameters were systematically determined. Furthermore, five regional layer-slip systems of the basement and the cover strata were scientifically divided in the Middle Yangzi area, and they have been synthetically compared with the determined parameters in the Lower Yangzi area. Overall, the parameter value of a sliplayer presenting relative plasticity, ductility and viscosity is higher than a non-slip layer presenting relative elasticity, brittleness and rigidity, except the value of the Poission's ratio of the rock and the determined temperature of the inclusion, other parameters (such as the uniaxial pressure strength of the rock, the elastic module, the density and the elastic wave velocity) are all lower. On the basis of the study, the authors still further explain a pneumatic cushion effect of the slip-layer and the research significance.
文摘Warm and humid climate and gentle hilly topography have provided favourable conditions for the devel-opment of the weathering crust of the granite intrusions in the Longnan area, Jiangxi Province. REE is mostlyconcentrated in an adsorption state in clay in the wholly weathered zone. The rare-earth minerals enriched inthe parent rocks provided the source material for the REE enrichment. Exchangeable REE accounts for48-86%. Extraction experiments and stable isotopic study of clay minerals suggest that the downward infiltra-tion of meteoric water and increasing gradient of pH values have played an important role in the enrichment ofREE during the progressive weathering. Slight fractionation of individual REE can not change their distribu-tion patterns in the profiles. which are inherited from the parent rocks.
基金Supported by Science and Technology Project in Jiangxi Department of Education (GJJ08471)"Forest Protection" Projects of Key Disciplines in Yunnan Province (XKZ200905)~~
文摘[Objective] The paper was to provide the scientific basis for effective monitoring and early warning on oriental fruit fly in Jiangxi Province.[Method] Using the distribution data and environmental factor data of oriental fruit fly,the potential distribution area of oriental fruit fly in Jiangxi Province was predicted by GARP ecological niche model.[Result]The total suitable area for oriental fruit fly in Jiangxi province was over two thirds of the whole province.Most areas in southern Jiangxi basin ranged from 24° to 26° N were the high suitable area for oriental fruit fly,where the annual average temperature was 19-20℃.Part areas in north Ganzhou and small areas in southwest Ji＇an,Wuzhou,Yingtan,southeast Shangrao ranged from 26° to 27° N were the moderate suitable areas for oriental fruit fly,where the annual average temperature was 18-19℃.The low suitable area was ranged from 26° to 30° N including Binhu,Ganjiang River,Wuhe,Yuanshui area and Southwestern Mountain of Jiangxi Province,where the annual average temperature was 17-18℃.Northeast and northwest areas in Jiangxi Province and coastal areas along the Yangtze River was predicted to be non-suitable area for oriental fruit fly,where the annual average temperature was 16-17℃.[Conclusion] The results showed that the actual distribution of oriental fruit fly basically was consistent with the distribution predicted by GARP.
