40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins

Details 40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins 40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983e%26psl..64..244h&link_type=abstract

Earth and Planetary Science Letters, Volume 64, Issue 2, p. 244-256.

Mathematics

Logic

5

Scientific paper

Detrital microcline grains from sedimentary strata preserve a record of thermal evolution in the temperature range ~ 100° to 200°C which can be revealed by 40Ar/39Ar age spectrum analysis. Microcline separates from deep drill hole intersections with Eocene to Miocene sediments in the Basin and Tejon Blocks of the southern San Joaquin Valley, California, analysed by the age spectrum approach show radiogenic 40Ar (40Ar*) gradients that record both the slow cooling of the uplifting sediment source ~ 65 Ma ago, and a recent thermal event. This information, in conjunction with the observation of fission track annealing in the coexisting apatites, allows estimation of the temperature-time conditions of this thermal event at about 140°C for ~ 200 ka. Present and paleotemperature data is in accord with heating related to several kilometers of Pleistocene sediment deposition. Heat flow calculations suggest that this recent subsidence has depressed the thermal gradient from about 30°C km-1 to the present apparent gradient of 24°C km-1.
40Ar/39Ar analysis of detrital microcline crystals yields thermochronological information in the temperature-time range of petroleum maturation and provides this technique with potential as both a useful exploration tool and as a means of probing the fundamental geodynamic processes of basin evolution.
Present address: Conservation Center, New York University, 14 East 78th Street, New York, NY 10021, U.S.A.

Affiliated with

Also associated with

No associations

Rating

40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with 40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 40Ar/39Ar age spectrum analysis of detrital microclines from the southern San Joaquin Basin, California: an approach to determining the thermal evolution of sedimentary basins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-741986