- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Asia
-
Arabian Peninsula
-
Saudi Arabia (1)
-
-
-
Atlantic Ocean
-
North Atlantic
-
North Sea (1)
-
-
-
Europe
-
Western Europe
-
France
-
Normandy (1)
-
Paris France (1)
-
-
Ireland
-
Clare Ireland (1)
-
-
Scandinavia
-
Denmark
-
Sjaelland (1)
-
Stevns Klint (1)
-
-
Norway (1)
-
-
United Kingdom
-
Great Britain
-
England
-
East Anglia
-
Norfolk England
-
Norwich England (1)
-
-
-
-
-
-
-
-
-
commodities
-
chalk deposits (6)
-
construction materials
-
building stone (1)
-
-
limestone deposits (2)
-
mineral exploration (1)
-
oil and gas fields (1)
-
petroleum (1)
-
sodium sulfate (1)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene
-
Middle Ages (1)
-
Neolithic (1)
-
upper Holocene
-
Roman period (1)
-
-
-
-
Stone Age
-
Neolithic (1)
-
-
Tertiary
-
Paleogene
-
Eocene
-
middle Eocene
-
Lutetian (1)
-
-
-
-
-
-
Paleozoic
-
Permian
-
Upper Permian
-
Zechstein (1)
-
-
-
-
-
Primary terms
-
Asia
-
Arabian Peninsula
-
Saudi Arabia (1)
-
-
-
Atlantic Ocean
-
North Atlantic
-
North Sea (1)
-
-
-
Cenozoic
-
Quaternary
-
Holocene
-
Middle Ages (1)
-
Neolithic (1)
-
upper Holocene
-
Roman period (1)
-
-
-
-
Stone Age
-
Neolithic (1)
-
-
Tertiary
-
Paleogene
-
Eocene
-
middle Eocene
-
Lutetian (1)
-
-
-
-
-
-
construction materials
-
building stone (1)
-
-
data processing (1)
-
deformation (1)
-
engineering geology (1)
-
Europe
-
Western Europe
-
France
-
Normandy (1)
-
Paris France (1)
-
-
Ireland
-
Clare Ireland (1)
-
-
Scandinavia
-
Denmark
-
Sjaelland (1)
-
Stevns Klint (1)
-
-
Norway (1)
-
-
United Kingdom
-
Great Britain
-
England
-
East Anglia
-
Norfolk England
-
Norwich England (1)
-
-
-
-
-
-
-
-
faults (2)
-
fractures (2)
-
geophysical methods (2)
-
land subsidence (1)
-
limestone deposits (2)
-
mineral exploration (1)
-
oil and gas fields (1)
-
Paleozoic
-
Permian
-
Upper Permian
-
Zechstein (1)
-
-
-
-
petroleum (1)
-
pollution (1)
-
rock mechanics (2)
-
sedimentary rocks
-
carbonate rocks
-
chalk (2)
-
limestone (1)
-
-
chemically precipitated rocks
-
flint (1)
-
-
clastic rocks
-
sandstone (1)
-
shale (1)
-
-
-
sodium sulfate (1)
-
structural analysis (2)
-
tectonics (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks
-
chalk (2)
-
limestone (1)
-
-
chemically precipitated rocks
-
flint (1)
-
-
clastic rocks
-
sandstone (1)
-
shale (1)
-
-
-
chalk deposits
On the usage of diffractions in ground-penetrating radar reflection data: Implications for time-lapse gas migration monitoring
Abstract Old chalk and flint mine workings occur widely across southern and eastern England. Over 3500 mines are recorded in the national Stantec Mining Cavities Database and more are being discovered each year. The oldest flint mines date from the Neolithic period and oldest chalk mines from at least medieval times, possibly Roman times. The most intensive period for mining was during the 1800s, although some mining activities continued into the 1900s. The size, shape and extent of the mines vary considerably with some types only being found in particular areas. They range from crudely excavated bellpits to more extensive pillar-and-stall styles of mining. The mines were created for a series of industrial, building and agricultural purposes. Mining locations were not formally recorded so most are discovered following the collapse of the ground over poorly backfilled shafts and adits. The subsidence activity, often triggered by heavy rainfall or leaking water services, poses a hazard to the built environment and people. Purpose-designed ground investigations are needed to map out the mine workings and carry out follow-on ground stabilization after subsidence events. Where mine workings can be safely entered they can sometimes be stabilized by reinforcement rather than infilling.
Comparison between petrophysical properties, durability and use of two limestones of the Paris region
Abstract Most buildings of architectural heritage in Paris and its surroundings are built with Lutetian limestone. Several historic buildings of the ‘Vexin Normand’ region show Lutetian limestone in the upper parts of their walls, while the lower parts are built with a chalk known as ‘Pierre de Vernon’. The ‘Pierre de Vernon’ appears up to the first metre, although in exceptional cases it can reach the middle height of a building. Commonly, chalks exhibit low durability due to their high porosity. However, ‘Pierre de Vernon’ is supposed to have greater durability than other chalks because of its historic use for basement construction. The objective of this research was to understand the use of the ‘Pierre de Vernon’ in the lower part of the constructions. A petrophysical characterization of Vernon chalk and Lutetian limestone was carried out, focusing mainly on the differences in porosity and water uptake. Salt crystallization tests were done to contrast their response to decay. Colour and roughness measurements and scanning electron microscope observations were performed. Results show that the different porous networks of these two limestones lead to a high contrast in their hydric properties and responses to decay, and the use of Vernon chalk in the lower sections of buildings has been found to be appropriate.
Predicting subseismic fracture density and orientation in the Gorm Field, Danish North Sea
Abstract The chalk reservoir of the Gorm Field, southern North Sea is dome-shaped and faulted owing to a combination of salt diapirism and regional east–west extension. Fractures developed in the structure considerably enhance permeability. The dataset discussed here records fractures in horizontal wells from more than 10 km of image logs and provides a special opportunity to test theoretical models of fracture development with quantitative observations. In an effort to forecast fracture density and fracture orientation, we have estimated the strains in the structure using an elastic dislocation model that incorporates mechanical boundaries in the form of the tectono-stratigraphic interface with salt and tectonic faults. More than 50% of the angular differences between poles to the planes of simulated and observed fractures are less than 30°; 75% are less than 45°. Relative strain magnitude appears to be a useful indicator of fracture density. At the field scale, small strain magnitudes correspond with small non-zero fracture densities and relatively large strain magnitudes correspond with high fracture densities.