2006 Vol. 31, No. 6
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2006, 31(6): 747-753.
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Abstract:
The earth'sorbital geometry configurates eccentricity, obliquity and precession, which control the seasonal and latitudinal distribution of the insolation on the earth's surface. In the periodic variations of the insolation, the precession cycles of ...
The earth'sorbital geometry configurates eccentricity, obliquity and precession, which control the seasonal and latitudinal distribution of the insolation on the earth's surface. In the periodic variations of the insolation, the precession cycles of ...
2006, 31(6): 754-764.
Abstract:
The disappearance at ~10 Ma of the deep dwelling planktonic foraminifer Globoquadrina dehiscens from the western Pacific including the South China Sea was about 3 Ma earlier than its final extinction elsewhere. Accompanying this event at ~10 Ma was a...
The disappearance at ~10 Ma of the deep dwelling planktonic foraminifer Globoquadrina dehiscens from the western Pacific including the South China Sea was about 3 Ma earlier than its final extinction elsewhere. Accompanying this event at ~10 Ma was a...
2006, 31(6): 765-772.
Abstract:
The climate was obviously instable in the last glacial cycle, especially in the Marine Oxygen Isotope Stage 3. The South Asian monsoon activities conflict with the glaciation and interglaciation rule. The paleo ceanographic study of the core BAR9427 ...
The climate was obviously instable in the last glacial cycle, especially in the Marine Oxygen Isotope Stage 3. The South Asian monsoon activities conflict with the glaciation and interglaciation rule. The paleo ceanographic study of the core BAR9427 ...
2006, 31(6): 773-779.
Abstract:
The Donggou Section located in the east of Nihewan basin contains a suite of strata consisted mainly of lacustrine sediments approximate to 100 m thick. Both grain size distribution and magnetic susceptibility are measured in successive samples colle...
The Donggou Section located in the east of Nihewan basin contains a suite of strata consisted mainly of lacustrine sediments approximate to 100 m thick. Both grain size distribution and magnetic susceptibility are measured in successive samples colle...
2006, 31(6): 780-786.
Abstract:
Planktonic foraminifera results from ODP Site 1144 in the northern South China Sea indicate that the Mid-Pleistocene climate transition is characterized by high-frequency changes on the millennial scale. In pace with glacial-interglacial cycles after...
Planktonic foraminifera results from ODP Site 1144 in the northern South China Sea indicate that the Mid-Pleistocene climate transition is characterized by high-frequency changes on the millennial scale. In pace with glacial-interglacial cycles after...
2006, 31(6): 787-797.
Abstract:
Geochemical data from the Yangdi Section of Guilin, Guangxi, showed an oxygen-rich to dysaerobic environment with the vibrating rise in sea-level in the Late Frasnian Stage, Devonian. At the same time, δ13Ccarb and δ13Ckerogen increased from +0.43 (‰...
Geochemical data from the Yangdi Section of Guilin, Guangxi, showed an oxygen-rich to dysaerobic environment with the vibrating rise in sea-level in the Late Frasnian Stage, Devonian. At the same time, δ13Ccarb and δ13Ckerogen increased from +0.43 (‰...
2006, 31(6): 798-806.
Abstract:
In this paper, the microfossil assemblage from drilling core samples of Xifeng oilfield is discussed with palynologic analystic method, to clarify terrestrial sediment environment of Yanchang Formation in Ordos basin during the Middle and Late Triass...
In this paper, the microfossil assemblage from drilling core samples of Xifeng oilfield is discussed with palynologic analystic method, to clarify terrestrial sediment environment of Yanchang Formation in Ordos basin during the Middle and Late Triass...
2006, 31(6): 807-816.
Abstract:
Petrologicos-geochemical data reveals the compositional features of Mesozoic volcanic rocks in West Liaoning: (1) Relatively high values of Mg# and higher contents of Cr and Ni; (2) Most of volcanic magmas are derived from enriched lithospheric mantl...
Petrologicos-geochemical data reveals the compositional features of Mesozoic volcanic rocks in West Liaoning: (1) Relatively high values of Mg# and higher contents of Cr and Ni; (2) Most of volcanic magmas are derived from enriched lithospheric mantl...
2006, 31(6): 817-822.
Abstract:
Three layers are present in the middle and upper crusts in the northern border of Sulu orogenic belt, as revealed by the S-N-strike reflecting seismic profiles that cross the Zhucheng sag. These three layers are the uppermost sedimentary cover of Jia...
Three layers are present in the middle and upper crusts in the northern border of Sulu orogenic belt, as revealed by the S-N-strike reflecting seismic profiles that cross the Zhucheng sag. These three layers are the uppermost sedimentary cover of Jia...
2006, 31(6): 823-829.
Abstract:
Geodynamic settings play an important role in controlling generation, ascent and final emplacement of magma. Mesozoic intermediate-acid intrusive rocks are closely related with large scale mineralization in the Tongling metallogenic cluster area. The...
Geodynamic settings play an important role in controlling generation, ascent and final emplacement of magma. Mesozoic intermediate-acid intrusive rocks are closely related with large scale mineralization in the Tongling metallogenic cluster area. The...
2006, 31(6): 830-838.
Abstract:
Along with the processes of continent crust subduction, the nominally anhydrous minerals (NAMs) in UHP rocks can transport some surface water into the deep upper mantle. Such water stored in the deep upper mantle plays an important role in the dynami...
Along with the processes of continent crust subduction, the nominally anhydrous minerals (NAMs) in UHP rocks can transport some surface water into the deep upper mantle. Such water stored in the deep upper mantle plays an important role in the dynami...
2006, 31(6): 839-845.
Abstract:
In this paper, ICP-MS analytic technology is employed to test the strontium and manganese contents of 109 samples collected from four wells in Tazhong area, Tarim basin. In addition, strontium isotope composition tests have also been conducted, with ...
In this paper, ICP-MS analytic technology is employed to test the strontium and manganese contents of 109 samples collected from four wells in Tazhong area, Tarim basin. In addition, strontium isotope composition tests have also been conducted, with ...
2006, 31(6): 846-850.
Abstract:
The estimation of fractures is a key to the evaluation of the fractured carbonate reservoirs. Many obstacles are present for the evaluation of this kind of reservoir because of its heterogeneously-distributed fractures and anisotropies. A three-dimen...
The estimation of fractures is a key to the evaluation of the fractured carbonate reservoirs. Many obstacles are present for the evaluation of this kind of reservoir because of its heterogeneously-distributed fractures and anisotropies. A three-dimen...
2006, 31(6): 851-856.
Abstract:
Based upon the relationship between carbonate content and stratal velocity and density, we attempted to apply the artificial neural network to the inversion of carbonate content summarized from the high-resolution seismic data limited by controlled w...
Based upon the relationship between carbonate content and stratal velocity and density, we attempted to apply the artificial neural network to the inversion of carbonate content summarized from the high-resolution seismic data limited by controlled w...
2006, 31(6): 857-860.
Abstract:
The magnetotelluric sounding (MT) surveying was recently conducted in the Songpan-Aba district in the northwest of Sichuan, a "delta" specific to the eastern part of the Tibetan plateau. The analysis of the two crossed MT inversion sections reveals a...
The magnetotelluric sounding (MT) surveying was recently conducted in the Songpan-Aba district in the northwest of Sichuan, a "delta" specific to the eastern part of the Tibetan plateau. The analysis of the two crossed MT inversion sections reveals a...
2006, 31(6): 861-866.
Abstract:
The southern section of "Sanjiang ore-forming zone" (the western Yunnan terrain), southwestern China, located at the joined belt between the Indian plate and Yangtze plate, is an important area of eastern Tethyan tectonic ore-forming domain. The poly...
The southern section of "Sanjiang ore-forming zone" (the western Yunnan terrain), southwestern China, located at the joined belt between the Indian plate and Yangtze plate, is an important area of eastern Tethyan tectonic ore-forming domain. The poly...
2006, 31(6): 867-872.
Abstract:
Resonant cavity perturbation method, widely used as an easy and fast method for determining dielectric properties of materials at microwave frequencies, is very sensitive to the measurement of the materials with low ε′ and tanδ values. However, it is...
Resonant cavity perturbation method, widely used as an easy and fast method for determining dielectric properties of materials at microwave frequencies, is very sensitive to the measurement of the materials with low ε′ and tanδ values. However, it is...
2006, 31(6): 873-878.
Abstract:
In the five-month indoor earth-column experiment, three representative kinds of natural sand are analyzed, and the refluxes of domestic sewage are used to simulate the contaminated river flow. This indoor experiment aims at both the simulation of the...
In the five-month indoor earth-column experiment, three representative kinds of natural sand are analyzed, and the refluxes of domestic sewage are used to simulate the contaminated river flow. This indoor experiment aims at both the simulation of the...
2006, 31(6): 879-884.
Abstract:
The research from 1986 to 2000 into the dynamic processes and interactions among annual precipitation, annual groundwater recharge from rainfall and annual pumpage for agriculture in Hebei plain to the south of Beijing and Tianjin, revealed the negat...
The research from 1986 to 2000 into the dynamic processes and interactions among annual precipitation, annual groundwater recharge from rainfall and annual pumpage for agriculture in Hebei plain to the south of Beijing and Tianjin, revealed the negat...
2006, 31(6): 885-890.
Abstract:
This paper takes the eastern and western mountain areas of Taiyuan basin, Shanxi Province as a case study. On the basis of groundwater system theory and geographic information system (GIS) technique, some quantitative or semiquantitative structural i...
This paper takes the eastern and western mountain areas of Taiyuan basin, Shanxi Province as a case study. On the basis of groundwater system theory and geographic information system (GIS) technique, some quantitative or semiquantitative structural i...
