Somogyi Múzeumok Közleményei 14. (2000)
Márton Péter: Jelentés a Somogy megyében feltárt koraközépkori vasolvasztó műhelyek archeomágneses keltezésének eredményeiről
228 MARTON PETER D° l° к dl° dD° Somogyfajsz, 2. kohó 21.6 68.1 252 3.8 10.2 16. kohó 19.3 65.3 239 3.1 7.4 Somogyvámos, 1.kohó 12.6 69.2 602 2.5 7.0 2.kohó 15.4 68.8 — — — 5. kohó 14.0 70.6 734 2.8 8.4 23. kohó 10.3 68.6 675 2.1 5.8 Magyaratád, 1.kohó -12.1 74.2 220 3.5 12.9 Bodrog-Alsóbű, ?. kohó 16.4 69.8 370 3.5 10.1 8.kohó 12.1 70.6 338 3.6 10.8 9. kohó 8.1 66.0 116 4.5 11.0 15. kemence 17.8 69.1 1410 2.0 5.6 33. kohó 18.1 69.4 292 3.0 8.5 1. táblázat: A somogyi középkori kohótelepeken megmintázott objektumok (Budapestre átszámított) archeomágneses irányadatai (D°, 1°), statisztikai paraméterekkel (k, dl 0 , dD°). D és I a remanencia irányának deklinációja, illetve inklinációja. к az individuális irányok csoportulására jellemző, un. pontossági paraméter (Fisher, 1953). dl 0 és dD° az inklináció, illetve deklináció 95%-os szintű konfidencia intervallumának félszélessége. Hivatkozások Fisher, R. A. 1953. Dispersion on a sphere. Proc. R. Márton, P. 1998/2. Archaeomagnetic directional data Soc. London, Ser. A, 217. 295-305. Márton, P. 1998/1. Keltezés archeomágneses módszerrel. In: Hon, G (Szerk.) Panniculus, Ser. В. No. 3, 335-347. Szombathely, 1998. for Hungary and their application for archaeomagnetic dating. In: L. Költő and L. Bartosievicz (Eds.) Archaeometrical Research in Hungary II. 71-74. Budapest-KaposvárVeszprém, 1998. Short report on archaeomagnetic dating studies of early Medieval ironsmelting workshops in the county of Somogy, Hungary. PETER MARTON Hitherto, about 150 archaeological features (fired clay objects in place) have been studied archaeomagnetically in order to establish the directional secular variation for Hungary for the last 2000 years or so. Most of the results are summarized in Márton (1998/2).The data obtained can now be used for dating purposes in some time windows, such as e. g. the Middle Ages. The present paper reports on an archaeomagnetic dating experiment of four early Medieval iron smelting workshops excavated recently in Somogy county. The remnants of 11 ironsmelting furnaces and 1 domestic oven were sampled from 4 locations (workshops) which were dated archaeologically as early Medieval. The samples were treated using standard palaeomagnetic techniques including incremental magnetic cleaning and linearity analyses when necessary. The archaeomagnetic directions (D°, l°) summarized together with Fisher's statistical parameters (k, dD°, dl°) in Table 1 are assumed to be parallel to the local terrestrial magnetic field at the time of last cooling in antiquity. The first column of Table 1 shows the locations of the workshops studied. On comparison with the secular variation curve (op. cit.) the data in Table 1 indicate the following ages. Magyaratád: Avar, definitely before 850 AD, Somogyvámos and Bodrog-Alsóbű: same age, (possibly early) 10 th century AD, Somogyfajsz: late 10 th century- early 11 th century AD. This research was partially supported by an OTKA grant, No. T 019282. Author's address: PÉTER MÁRTON ELTE, Geofizikai Tanszék H-1083 Budapest, Ludovika tér 2 E-mail: martonp@ludens.elte.hu
