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The AAPG/Datapages Combined Publications Database

Pacific Section of AAPG

Abstract


Structural Geology of the Sacramento Basin: 1992 Pacific Section Annual Convention, 1992
Pages 143-151

Intersection of the Stockton and Vernalis Faults, Southern Sacramento Valley, California

Robert H. Sterling Jr.

Abstract

The Stockton and Vernalis Faults are major structural features in the southern Sacramento Basin of California. Both faults are reverse faults with some component of left lateral strike slip. Most of the major gas accumulations in the area are associated with the Stockton and Vernalis Faults (Figure 1). The Stockton Previous HitFaultNext Hit has a north-south orientation at the intersection point with the Vernalis Previous HitFaultNext Hit, which changes from a northwesterly trend at the Tracy anticline to a westerly trend at the intersection point. Throw along the faults are varies with depth but is relatively consistent except at the intersection point of the two faults, which occurs in the vicinity of section 18, T2S R5E, San Joaquin County, California. The Previous HitfaultNext Hit planes appear to join an become one Previous HitfaultNext Hit plane with increased throw as evidenced by the Previous HitfaultNext Hit cut in the Atlantic Holly Sugar #1 well in section 18, T2S R5E. The combined Previous HitfaultNext Hit plane, labeled the Stockton-Vernalis (SV) Previous HitfaultNext Hit, then is cut by yet another northwesterly trending thrust Previous HitfaultNext Hit located west of the SV intersection named for this paper the West Tracy Previous HitFaultTop. This intersection could hold some significance in future exploration in the area. Other thrust faults in Sacramento Basin have been found to be important to trapping gas and an understanding of these faults will yield further exploration targets.


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