Geophysical depth to basement research in the SW sector of the Santa Lucia Basin, southern Uruguay
Por:
Corbo-Camargo, Fernando, Ramos, Julian, Rodriguez, Pablo, De los Santos, Jorge
Publicada:
1 ago 2021
Ahead of Print:
1 jun 2021
Categoría:
Geophysics
Resumen:
The Santa Lucia River Basin Trough is located in the southern sector of
the Eastern Republic of Uruguay and has an area of almost 6,000 km(2).
In this work, the depth to the basement in the SW sector of the Santa
Lucia Basin (SLB) was determined, using geophysical methods of
exploration. The interest of exploring this geological basin is to
determine its depth, recognizing the possible existence of deep
aquifers, and the feasibility of hydrothermalism. For this reason were
acquired, processed, inverted, and interpreted 10 magnetotelluric (MT)
soundings. A 3D inversion based on the ModEM code was performed, and a
2D inversion (NLCG) of the invariant determinant along a profile that
crosses the study area was carried out; their comparison yields similar
resistivity and structural models results. The resistivity modeling was
complemented with a Bouguer anomaly map created from a gravimetric
database of 157 stations. Our geophysical results indicate that the
Santa Lucia trough deepens toward the E-NE, reaching sedimentary
thicknesses that may exceed 950 m. Outside the studied sector, its depth
increases according to the gravity minimum, toward the NE of the area.
Therefore, sandy or deep fractured episodes could harbor hot springs,
whose temperature, considering the normal geothermal gradient of 30
degrees C/km, would approximately be in the range of 36-40 degrees C.
Filiaciones:
Corbo-Camargo, Fernando:
Corbo-Camargo, F (Corresponding Author), Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Corbo-Camargo, Fernando, Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Ramos, Julian, Univ Republica, Dept Agua, CENUR LN, Salto 50000, Uruguay. Rodriguez, Pablo, Adm Nacl Combustibles Alcohol & Portland ANCAP, Explorac & Prod, Montevideo 11100, Uruguay. De los Santos, Jorge, Univ Republica, FING, IMFIA, Grp Hidrol Subterranea, Montevideo 11300, Uruguay
Ramos, Julian:
Corbo-Camargo, F (Corresponding Author), Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Corbo-Camargo, Fernando, Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Ramos, Julian, Univ Republica, Dept Agua, CENUR LN, Salto 50000, Uruguay. Rodriguez, Pablo, Adm Nacl Combustibles Alcohol & Portland ANCAP, Explorac & Prod, Montevideo 11100, Uruguay. De los Santos, Jorge, Univ Republica, FING, IMFIA, Grp Hidrol Subterranea, Montevideo 11300, Uruguay
Rodriguez, Pablo:
Corbo-Camargo, F (Corresponding Author), Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Corbo-Camargo, Fernando, Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Ramos, Julian, Univ Republica, Dept Agua, CENUR LN, Salto 50000, Uruguay. Rodriguez, Pablo, Adm Nacl Combustibles Alcohol & Portland ANCAP, Explorac & Prod, Montevideo 11100, Uruguay. De los Santos, Jorge, Univ Republica, FING, IMFIA, Grp Hidrol Subterranea, Montevideo 11300, Uruguay
De los Santos, Jorge:
Corbo-Camargo, F (Corresponding Author), Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Corbo-Camargo, Fernando, Univ Nacl Autonoma Mexico, Ctr Geociencias CGEO, Queretaro 76230, Mexico. Ramos, Julian, Univ Republica, Dept Agua, CENUR LN, Salto 50000, Uruguay. Rodriguez, Pablo, Adm Nacl Combustibles Alcohol & Portland ANCAP, Explorac & Prod, Montevideo 11100, Uruguay. De los Santos, Jorge, Univ Republica, FING, IMFIA, Grp Hidrol Subterranea, Montevideo 11300, Uruguay
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