FISSION TRACK DATING OF APATITE

Green PF (1981) A new look at statistics in fission track dating. Nucl Tracks 5 77-86 Green PF (1985) Comparison of zeta calibration baselines for fission-track dating of apatite, zircon and sphene. Chem Geol 58 1-22... [Pg.622]

Naeser CW, Cunningham CG, Marvin RF, Obradovich JD (1980) Pliocene intrasive rocks and mineralization near Rico, Colorado. Econ Geol 75 122-133 Naeser CW, Zimmerman RA, Cebttla GT (1981) Fission-track dating of apatite and zircon an interlaboratory comparison. Nucl Tracks 5 65-72... [Pg.626]

The interpretation of fission-track dates of apatite at increasing depths in a section of stable continental crust in Fig. 15.14 is based on the effect of temperature on the retention of fission tracks. This criterion is used to define three zones with increasing depth below the surface (Gleadow and Fitzgerald 1987) ... [Pg.505]

In an area where the crust is being uplifted, the fission-track dates of apatite increase with increasing elevations of the collecting sites and record the time that has elapsed since the samples cooled through the 60°C isotherm. All of the fission-track dates in the Transantarctic Mountains post-date the intrusion of the sills of Ferrar Dolerite which had already cooled before the apatites and other uranium-bearing minerals began to accumulate fission track. [Pg.506]

The fission-track dates of apatite from Mt. Doorly form two line segments in Fig. 15.15b. The slope of the line from 100 to 50 Ma is 10 m/10 year. The uplift rate increased sharply at about 50 Ma (early Eocene). Gleadow and Fitzgerald (1987) estimated that the average post-Eocene uplift rate of Mt. Doorly was 96-106 m/10 year. The fission-track dates of apatite from Mt. Newall (not shown) confirmed the change in the uplift rate at about 50 Ma indicated by the results for Mt. Doorly. [Pg.506]

Relatively little work has been carried out on fission track dating of phosphate minerals other than apatite, and merrillite, P-Ca3(P04)2, is the only other example to have received any significant attention. Two early studies examined the potential of monazite, (Ce,La,Y,Th)P04, and pyromorphite Pb5(P04)3Cl, but these minerals have not been studied further. Pyromorphite was shown by Haack (1973) to contain numerous spontaneous fission tracks, but these were very unevenly distributed, making its use in dating very difficult. [Pg.580]

Fission Track Dating of Phosphates, Thermochronology of Apatite... [Pg.581]

Crongh S T (1983) Apatite fission-track dating of erosion in the eastern Andes, Bolivia. Earth Planet Sci... [Pg.619]

Omar GI, Johrrson KR, Hickey LJ, Robertson PB, Dawson MR, Bamosky CW (1987) Fission-track dating of Haughton Astrobleme and included biota, Devon Island, Canada. Science 237 1603-1605 Omar GI, Sleekier MS, Buck WR, Kohn BP (1989) Fission track analysis of basement apatites at the western margin of the Gulf of Suez rift, Egypt Evidence for synchroneity of uplift and subsidence. Earth Planet Sci Lett 94 316-328... [Pg.626]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...