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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
A pulsed magnetic resonance borehole tool was used to characterize hydraulic properties of the aquifer. Borehole nuclear magnetic resonance (bNMR) logs were collected to measure the water content and to estimate the pore-size distribution and hydraulic conductivity (K) over the depth of the borehole. The bNMR data were collected July 25-26, 2016, and were processed August 2016.
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