搜索结果: 1-15 共查到“理学 Till”相关记录20条 . 查询时间(0.049 秒)
Double dating detrital zircons in till from the Ross Embayment, Antarctica
geochronology thermochronology Ross Embayment, Antarctica Antarctica
2015/1/16
U/Pb and (U-Th)/He (ZHe) dating of detrital zircons from glacial till samples in the Ross Embayment, Antarctica records cooling after the Ross/Pan-African orogeny (450-625 Ma) followed by a mid-Jurass...
ROCK, TILL, AND ICE: A PROVENANCE STUDY OF THE BYRD GLACIER AND THE CENTRAL AND WESTERN ROSS SEA, ANTARCTICA
Glacial Geology Byrd Glacier Ross Sea Provenance
2015/1/16
Petrography of the sand fraction, particle size analysis, and detrital zircon U/Pb isotope data, and pebble count data were collected from Byrd Glacier moraines and central/western Ross Sea till in or...
Geochemistry and Inorganic Carbon Transport of a Glacial Till Drumlin at a Road Salt Facility
road salt total dissolved inorganic carbon transport
2014/10/31
Investigations were conducted at a salt/premix storage facility lying on top of a glacial drumlin near the coastline in eastern Massachusetts, to characterize salt contaminated groundwater. Groundwate...
Modelling Water Exchange and Transit Times in Till Basins Using Oxygen-18
Water Exchange Transit Times Till Basins Oxygen-18
2009/10/27
The application of hydrological models to data on conservative tracers can
yield information about transit times and storage volumes and may provide an
independent test of the model structure.In thi...
Spring Discharge and Aquifer Characteristics in a Sandy Till Area in Southeastern Sweden
Spring Discharge Aquifer Characteristics Sandy Till Area
2009/10/27
Spring discharge and groundwater levels were used to study groundwater outflow
recessions, groundwater reservoir sizes, water yielding properties and
saturated hydraulic conductivities in a sandy ti...
Isotope studies in Swedish till basins indicate that stream stormflow is normally
dominated by pre-event water. The rapid response of the groundwater outflow
to infiltration may be explained by a la...
A Model for the Relationship between the Hydraulic Conductivity and Primary Sedimentary Structures of Till
Hydraulic Conductivity Primary Sedimentary Structures Structures of Till
2009/10/27
An investigation has been made of the relationships between saturated hydraulic
conductivity, porosity and micro-structure of undisturbed lodgement till
samples. 35 measurements with a constant head...
Methods Used for Calculation of Plant Available Water in Nordic Till Soils
Calculation Available Water Nordic Till Soils
2009/10/27
This paper describes different methods used in the Nordic countries for calculation
of the storage capacity of tills for water available for plant production. The
purpose of the paper is to give an ...
Unsaturated Hydraulic Conductivity Determined by the Hot Air Method for Some Danish Till Soils
Hydraulic Conductivity Hot Air Method Danish Till Soils
2009/10/27
Unsaturated hydraulic conductivity relations for topsoil and subsoil in 12 Danish
till soils were obtained from measurements by the hot air method. In the
range of pressure potentials (pF-values fro...
Hydrogeological properties of tills are highly dependent upon factors as grainsize
distribution, compaction, orientation of particles, presence of fractures
and occurrence of sorted sediments. These...
Sediment Fabric and Anisotropy of Hydraulic Conductivity in Sandy Till,Wisconsin, U.S.A.
Sediment Fabric Anisotropy of Hydraulic Conductivity
2009/10/23
The orientation of macroscopic and n~icroscopic particles in silty, sandy basal
till appears to have little effect on aquifer anisotropy. The orientation of 108
elongate pebble and cobble-sized part...
Spatial Variability of Contaminant Transport in a Fractured Till,Avedøre Denmark
Spatial Variability Contaminant Transport Fractured Till
2009/10/23
A field experiment shows that rapid downward migration of solutes and microorganisms
can occur in a fractured till. A solute tracer, chloride, and a bacteriophage
tracer, PRD-1, were added to ground...
Fracture Distribution and Occurrence of DNAPL in a Clayey Lodgement Till
Fracture Distribution Occurrence of DNAPL Clayey Lodgement Till
2009/10/23
This study examines the spatial fracture network in a clayey lodgement till, and
the preferential flow pattern of DNAPL in the till. The study was conducted on
a former gasworks site contaminated wi...
Fractures and Biopores in Weichselian Clayey Till Aquitards at Flakkebjerg,Denmark
Fractures and Biopores Weichselian Clayey Till Aquitards
2009/10/23
The distribution of fractures and biopores in a clayey and sandy till aquitard was
investigated in two excavations, on southern Zealand, Denmark. A large number
of fracture data were measured and qu...
In Situ Measurements in Fractured Till Using Sidewall Sensors
Situ Measurements Fractured Till Sidewall Sensors
2009/10/23
Subsurface parameters, such as hydraulic head, often vary markedly with depth
in fine-grained glacial sediments, but sensors placed in vertical boreholes are
poorly suited to resolve these variation...