Paleomagnetic estimation of emplacement temperature of pyroclastic deposits-preliminary study of caldera de los Humeros and Alchichica crater
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Abstract
Preliminary palaeomagnetic results from pyroclilsüc deposits of a large caldera (Los Humeros) and a small explosion crater (Alchichica) are reported. The data are analyzed in terms of a simple classificaüon scheme based on the directional properties of initial remanent magnetization and demagnetized .. remanent magneüzations. The deposit studied in Los Humeros caldera is an ignimbrite with an emplacement temperature of about 4SOQc or higher. Deposits studied in the Alchichica explosion crater were deposited with emplacement temper!ltures between 100°C and 300°C with sorne of the lithic clasts cooling before and sorne cooling during the final deposition.
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References
ARAMAKI, S. and S. AKIMOTO, 1957. Temperature estimation of pyroclastic deposits by natural remanent magnetism. Am. J. Sci., 255, 619-627. DOI: https://doi.org/10.2475/ajs.255.9.619
CHADWICK, R. S., 1971. Paleomagnetic criteria for volcanic breccia emplacement Geol. Soc. Am. Bull., 82, 2285-2294. DOI: https://doi.org/10.1130/0016-7606(1971)82[2285:PCFVBE]2.0.CO;2
De SA, A. and J. W. WIDDOWSON, 1974. A digitally controlled AF demagnetizer for peak fields up to 0.1 Tesla. 1. Phys. Instr., 7, 266-268. DOI: https://doi.org/10.1088/0022-3735/8/4/019
DODSON, M. M. and E. McCLELLAND-BROWN, 1980. Magnetic blocking temperatures of single-domain grains during slow cooling. J. Geophys. Res., 85, 2625-2637. DOI: https://doi.org/10.1029/JB085iB05p02625
FISHER, R. A., 1953. Dispersion on a sphere. Proc. Roy. Soc. London, A. 217, 295-305. DOI: https://doi.org/10.1098/rspa.1953.0064
HOBLITT, R. P. and K. S. KELLOGG, 1979. Emplacement temperatures of unsorted and unstratified deposits of volcanic rock debris as determined by paleomagnetic techniques. Geol. Soc. Am. Bull., 90, 633-642. DOI: https://doi.org/10.1130/0016-7606(1979)90<633:ETOUAU>2.0.CO;2
KENT, D. V., D. NINKOVICH, T. PESCATORE and S. R. J. SPARKS, 1981. Palaeomagnetic determination of emplacements temperature of Vesuvius AD79 pyroclastic deposits. Nature, 290, 393-396. DOI: https://doi.org/10.1038/290393a0
McELHINNY, M. W., 1964. Statistical significance of the fold test in palaeomagnetism. Geophys. J. R. Astr. Soc., 8, 338-340. DOI: https://doi.org/10.1111/j.1365-246X.1964.tb06300.x
STEELE, W. K., 1981. Remanent magnetization of ash from the 18 May 1980 eruption of Mount S t. Helens. Geophys. Res. Lett., 8, 213-216. DOI: https://doi.org/10.1029/GL008i003p00213
STEPHENSON, A., 1967. Apparatus for thermal demagnetization by the progressive method, Methods in Palaeomagnetism, Elsevier, 296-298. DOI: https://doi.org/10.1016/B978-1-4832-2894-5.50051-3
URRUTIA-FUCUGAUCHI, J., 1980. Palaeointensity determination and K-Ar dating of the Tertiary north-east Jalisco volcanics (MEXICO). Geophys. J. R. Astr. Soc., 63, 601-618. DOI: https://doi.org/10.1111/j.1365-246X.1980.tb02641.x
YAÑEZ-GARCIA, C. and J. CASIQUE-V ASQUEZ, 1980. Informe geológico del proyecto geotérmico Los Humeros-Derrumbadas, Comisión Federal Electricidad, México, D. F., 59 p.