Strontium-isotope study of pore waters in San Joaquin basin, California
Nineteen pore-water samples from the late Miocene and younger marine formations were analyzed for strontium contents and isotopic compositions. All samples have /sup 87/Sr//sup 86/Sr ratios lower than the late Miocene seawater value (0.7090). The strontium values in many of these waters reflect silicate rather than carbonate reactions. In general, the strontium contents and isotopic ratios of the pore waters are related to the depth and location of the oil fields. The strontium contents as a whole show a tendency to increase with depth, although /sup 87/Sr//sup 86/Sr ratios have no simple depth relationship. The strontium contents and isotopic compositions of the pore waters fall into five groups related to geographic locations. This suggests localized evolution of pore waters in a given area and limited movement of these subsurface waters.
- Research Organization:
- Univ. of California, Santa Barbara, CA (USA)
- OSTI ID:
- 6634525
- Report Number(s):
- CONF-8804144-
- Journal Information:
- AAPG Bull.; (United States), Vol. 72:3; Conference: AAPG SEPM-SEG Pacific Section and SPWLA annual convention, Santa Barbara, CA, USA, 17 Apr 1988
- Country of Publication:
- United States
- Language:
- English
Similar Records
Isotope evolution of strontium in carbonate cements from the Stevens Sandstone: Implications for calcium mass transfer in the San Joaquin basin, California
Tracking calcium in the San Joaquin basin, California: A strontium isotopic study of carbonate cements at North Coles Levee
Related Subjects
CALIFORNIA
RESERVOIR FLUIDS
ISOTOPE RATIO
GEOLOGIC FORMATIONS
STRONTIUM 86
STRONTIUM 87
TERTIARY PERIOD
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
CENOZOIC ERA
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FEDERAL REGION IX
FLUIDS
GEOLOGIC AGES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
NORTH AMERICA
NUCLEI
RADIOISOTOPES
STABLE ISOTOPES
STRONTIUM ISOTOPES
USA
020200* - Petroleum- Reserves
Geology
& Exploration