BƯỚC ĐẦU NGHIÊN CỨU TỪ CẢM TRONG TRẦM TÍCH TẦNG VĂN HÓA HANG C6-1 Ở CÔNG VIÊN ĐỊA CHẤT TOÀN CẦU UNESCO ĐẮK NÔNG
The magnetic susceptibility (MS) of cave sediments has become a proxy for the paleoclimate. The magnetic properties of the sediments formed outside the cave are influenced by the weather. The sediments are later brought into the cave by various means and deposited. Thus, the MS in the stratigraphic...
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| Những tác giả chính: | , , , , , , , , , |
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| Định dạng: | Bài viết |
| Ngôn ngữ: | Vietnamese |
| Được phát hành: |
Trường Đại học Đà Lạt
2023
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| Truy cập trực tuyến: | https://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/114417 https://tckh.dlu.edu.vn/index.php/tckhdhdl/article/view/867 |
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| Thư viện lưu trữ: | Thư viện Trường Đại học Đà Lạt |
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| Tóm tắt: | The magnetic susceptibility (MS) of cave sediments has become a proxy for the paleoclimate. The magnetic properties of the sediments formed outside the cave are influenced by the weather. The sediments are later brought into the cave by various means and deposited. Thus, the MS in the stratigraphic column of cave sediments carries information about the weather when the sediments formed. The stratigraphic column at cave C6-1 has been investigated in several archaeological studies. In this study, 185 soil samples were collected to a depth of 184 cm at a sampling interval of about 1 cm. MS measurements were carried out by the Department of Geomagnetism at the Institute of Geophysics of the Vietnam Academy of Science and Technology. The MS results can be divided into eight magnetic zones, C6.1-1 to C6.1-8, of which C6.1-1, C6.1-3, C6.1-5, and C6.1-7 correspond to cold dry weather, and C6.1-2, C6.1-4, C6.1-6, and C6.1-8 correspond to warmer weather. Multi-Taper Method (MTM) analysis of the MS data shows three significant cycle ranges with MTM confidence levels above 95%. Using the carbon-14 radiocarbon dating method, we determined ages for three weather cycles of 562, 375, and 281 years. From 6,768 to 6,954 years BP, there was a sudden accumulation rate of sediment in the section that was 5 to 30 times higher than in other periods. |
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