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In March 2016, the U.S. Geological Survey drilled a borehole, MA-FSW-750-0100, through the unconsolidated sediments and 1.5 m into the bedrock in East Falmouth, Massachusetts, to improve understanding of the glacial history and hydrologic properties of the Cape Cod aquifer. Prior to drilling, candidate sites were investigated using surface geophysical methods. Passive seismic horizontal-to-vertical spectral ratio (HVSR) methods were used to estimate the depth of the unconsolidated deposits over bedrock. Transient electromagnetic (TEM) surveys were conducted to characterize the lithology and salinity of formation water in the subsurface, which was used to plan the borehole completion. The specific conductance of...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Borehole Logging,
Conductivity,
East Falmouth,
Electromagnetic Induction (EMI),
Electromagnetic Surveying, All tags...
Gamma-Ray Logging,
Groundwater,
Horizontal to Vertical Spectral Ratio Seismic (HVSR),
Massachusetts,
Nantucket Sound,
Nuclear Magnetic Resonance (NMR),
Passive Seismic,
Resistivity,
Seismic Methods,
Time Domain,
Transient Electromagnetics (TEM),
USGS Science Data Catalog (SDC),
environment,
geoscientificInformation, Fewer tags
In March 2016, the U.S. Geological Survey drilled a borehole, MA-FSW-750, through the unconsolidated sediments and 1.5 m into the bedrock in East Falmouth, Massachusetts, to improve understanding of the glacial history and hydrologic properties of the Cape Cod aquifer. Polyvinyl casing was set through the overburden and into the bedrock. About 10 days after borehole MA-FSW-750 was drilled, it was logged with geophysical methods including natural gamma radiation and electromagnetic induction (EMI) logs to identify changes in the lithology and fluid properties of the subsurface. In addition, the gamma and EMI logs were collected about 100 days after drilling, which allowed the drilling fluids to be displaced and natural...
Tags: Borehole Logging,
Conductivity,
East Falmouth,
Electromagnetic Induction (EMI),
Electromagnetic Surveying, All tags...
Gamma-Ray Logging,
Groundwater,
Massachusetts,
Nantucket Sound,
Natural Gamma Radiation,
Resistivity,
Seismic Methods,
environment,
geoscientificInformation, Fewer tags
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