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A constrained 2D gravity model of the Sebastián Vizcaíno Basin, Baja California Sur, Mexico
Author(s) -
GarcíaAbdeslem J.,
Romo J.M.,
GómezTreviño E.,
RamírezHernández J.,
EsparzaHernández F.J.,
FloresLuna C.F.
Publication year - 2005
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.2005.00510.x
Subject(s) - geology , structural basin , basement , pyroclastic rock , sedimentary rock , geomorphology , paleontology , inversion (geology) , density contrast , mesozoic , petrology , physics , volcano , civil engineering , engineering , astronomy
The subsurface geometry of the Sebastián Vizcaíno Basin is obtained from the 2D inversion of gravity data, constrained by a density‐versus‐depth relationship derived from an oil exploration deep hole. The basin accumulated a thick pile of marine sediments that evolved in the fore‐arc region of the compressive margin prevalent along western North America during Mesozoic and Tertiary times. Our interpretation indicates that the sedimentary infill in the Sebastián Vizcaíno Basin reaches a maximum thickness of about 4 km at the centre of a relatively symmetric basin. At the location of the Suaro‐1 hole, the depth to the basement derived from this work agrees with the drilled interface between calcareous and volcaniclastic members of the Alisitos Formation. A sensitivity analysis strongly suggests that the assumed density function leads to a nearly unique solution of the inverse problem.