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天然放射線をもちいたガーネム・アリ遺跡の土壌対比
https://doi.org/10.18999/bulnum.026.07
https://doi.org/10.18999/bulnum.026.070c847b92-0456-409f-af77-aba0b88f6ae6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
No26-7.pdf (2.2 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-04-26 | |||||
| タイトル | ||||||
| タイトル | 天然放射線をもちいたガーネム・アリ遺跡の土壌対比 | |||||
| 言語 | ja | |||||
| その他のタイトル | ||||||
| その他のタイトル | Radio-Stratigraphy for Tell Ghanem al-Ali, northern Syria | |||||
| 言語 | en | |||||
| 著者 |
田中, 剛
× 田中, 剛× TANAKA, Tsuyoshi× 於保, 俊× OHO, Suguru× 桂田, 祐介× KATSURADA, Yusuke |
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| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | An important aspect regarding the archaeological setting of the tell is in verifying whether Tell Ghanem al-Ali was built on a remnant edge of the old terrace or on the lowest Euphrates terrace. Geological survey of the area, however, is very difficult, because the terrace sediments do not contain any remarkable key beds like tuff. Thus, we performed on-site radioactivity measurements of gamma rays of 40K, 214Bi and 208Tl using an InSpector 1000 portable gammaray spectrometer from CANBERRA Co., equipped with an IPRON-3 3 × 3-inch NaI detector. The measurements are actually performed for 1461 keV gamma rays of 40K, 1764 keV gamma rays of 214Bi and 2614 keV gamma rays of 208Tl. 214Bi and 208Tl are the daughter nuclides appearing in the decay series of 238U to 206Pb and 232Th to 208Pb, respectively. Subsequently, we obtained the relative elemental abundances of potassium, uranium and thorium by these measurements. Thirty points covering Squares 1 and 2 of the excavation sites of the tell were selected. Radioactivity was also measured in the surrounding wheat field and the river terrace along Wadi el- Kharar for comparison. The detector was held 1 m high and the radioactivity within a 3 m radius of the detector can be measured. It takes 600s to complete the measurement for each measuring point. Activities for potassium range from 1000 to 4200 counts. These are common activities in natural environments in Syria as well as in Japan. Activities for potassium at the tell, more than 3000 counts, are higher than those at the wheat field and Wadi el-Kharar, which were mostly below 3000 counts. There is no significant difference between the tell and other places in uranium and thorium activity. Potassium is mostly contained in K-feldspar and mica minerals, and uranium and thorium are contained in accessory minerals such as zircon and monazite. The K-feldspar and mica minerals tend to weather easily, though the zircon and monazite resist weathering. K-feldspar is sparse in the river sediment because it is consumed (fragmented and dissolved) during transportation. On the other hand, zircon increases relatively in river sediments because of its resistance to weathering. Thus, we conclude that the sediments in the wheat field and the river terrace along Wadi el-Kharar exhibit the characteristics of river sediment, whereas the tell sediments do not. A large part of the tell sediments must be soils transported from nonriver terrain, probably from the hills behind the Ghanem al-Ali village. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | 名古屋大学博物館 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 出版タイプ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| ID登録 | ||||||
| ID登録 | 10.18999/bulnum.026.07 | |||||
| ID登録タイプ | JaLC | |||||
| ISSN（print） | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1346-8286 | |||||
| 書誌情報 |
ja : 名古屋大学博物館報告 巻 26, p. 59-70, 発行日 2010-12-25 |
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| 著者版フラグ | ||||||
| 値 | publisher | |||||
| URI | ||||||
| 識別子 | http://www.num.nagoya-u.ac.jp/outline/report.html | |||||
| 識別子タイプ | URI | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/14679 | |||||
| 識別子タイプ | HDL | |||||
