Geophysical Logs from the Toa-Baja Scientific Drillhole, Puerto-Rico

Publication Status is "Submitted" Or "In Press: 
LDEO Publication: 
Publication Type: 
Year of Publication: 
1991
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Journal Title: 
Geophysical Research Letters
Journal Date: 
Mar
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Volume: 
18
Issue: 
3
Pages: 
497-500
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Publisher: 
ISBN Number: 
0094-8276
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Edition: 
Short Title: 
Accession Number: 
ISI:A1991FC74800038
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Abstract: 

Geophysical logs from the Toa Baja drillhole on the north central coast of Puerto Rico are used to distinguish the variation in physical properties with depth in this non-volcanic island arc massif. A marked unconformity separates shallow Oligocene to Miocene limestones with considerable permeability contrast from a deeper sequence of volcaniclastic rocks with decreasing shaliness. A volcanic sill or flow overlying a strongly mineralized zone is found to cause the impedance contrast responsible for the strong seismic reflection anomaly (bright spot) that was the exploration target.

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Fc748Times Cited:2Cited References Count:4

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