Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin
Grain sizes and minerals of sediments from the Gulf of Tonkin were evaluated from 30 surface samples and 50 samples from two cores. The distribution of grain sizes and minerals from these samples were determined to help understand sediment characteristics, origins, and environmental dynamics. There...
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| Format: | Article |
| Language: | English |
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Vietnam Ministry of Science and Technology
2023-06-01
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| Series: | Vietnam Journal of Science, Technology and Engineering |
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| Online Access: | https://www.vietnamscience.vjst.vn/index.php/vjste/article/view/1142 |
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| author | Dang Hoai Nhon Nguyen Van Thao Tran Duc Thanh Nguyen Dac Ve Bui Van Vuong Lai Thi Bich Thuy Bui Thi Thanh Loan Hoang Thi Chien Duong Thanh Nghi |
| author_facet | Dang Hoai Nhon Nguyen Van Thao Tran Duc Thanh Nguyen Dac Ve Bui Van Vuong Lai Thi Bich Thuy Bui Thi Thanh Loan Hoang Thi Chien Duong Thanh Nghi |
| author_sort | Dang Hoai Nhon |
| collection | DOAJ |
| description |
Grain sizes and minerals of sediments from the Gulf of Tonkin were evaluated from 30 surface samples and 50 samples from two cores. The distribution of grain sizes and minerals from these samples were determined to help understand sediment characteristics, origins, and environmental dynamics. There were five sediment types: fine and very fine sands, very coarse, coarse, and medium silts. Minerals in the sediment were identified as decreasing in terms of the content of quartz, illite, kaolinite, chlorite, feldspar, goethite, halite, calcite, gibbsite, aragonite, and montmorillonite. Contents of major minerals such as quartz, illite, kaolinite, and chlorite varied from nearshore to offshore; quartz was higher nearshore than offshore; illite, kaolinite, and chlorite from nearshore were lower than offshore; calcite and aragonite were low nearshore and higher in the offshore; goethite was lower offshore and higher nearshore; and, finally, halite was high offshore and low nearshore. Surface sediments were divided into three groups based on sedimentary environment characteristics: Group 1 was distributed nearshore with strong dynamics, Group 2 in bays and nearshore with weak dynamics, and Group 3 was distributed offshore with quiet dynamics. The origin of the sediments was weathering and erosion from the mainland and islands under the river and sea processes in the Gulf of Tonkin with quartz, illite, kaolinite, feldspar, chlorite, and montmorillonite found present in the sediment. Geochemical processes produced goethite, gibbsite, halite, and pyrite in the sediments while biological substances produced calcite and aragonite.
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| first_indexed | 2024-03-13T00:36:39Z |
| format | Article |
| id | doaj.art-4b8e59169e5a4d8b83b66da0bf3871de |
| institution | Directory Open Access Journal |
| issn | 2525-2461 2615-9937 |
| language | English |
| last_indexed | 2024-03-13T00:36:39Z |
| publishDate | 2023-06-01 |
| publisher | Vietnam Ministry of Science and Technology |
| record_format | Article |
| series | Vietnam Journal of Science, Technology and Engineering |
| spelling | doaj.art-4b8e59169e5a4d8b83b66da0bf3871de2023-07-09T20:06:38ZengVietnam Ministry of Science and TechnologyVietnam Journal of Science, Technology and Engineering2525-24612615-99372023-06-0165210.31276/VJSTE.65(2).88-96Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of TonkinDang Hoai NhonNguyen Van ThaoTran Duc ThanhNguyen Dac VeBui Van VuongLai Thi Bich ThuyBui Thi Thanh LoanHoang Thi ChienDuong Thanh Nghi Grain sizes and minerals of sediments from the Gulf of Tonkin were evaluated from 30 surface samples and 50 samples from two cores. The distribution of grain sizes and minerals from these samples were determined to help understand sediment characteristics, origins, and environmental dynamics. There were five sediment types: fine and very fine sands, very coarse, coarse, and medium silts. Minerals in the sediment were identified as decreasing in terms of the content of quartz, illite, kaolinite, chlorite, feldspar, goethite, halite, calcite, gibbsite, aragonite, and montmorillonite. Contents of major minerals such as quartz, illite, kaolinite, and chlorite varied from nearshore to offshore; quartz was higher nearshore than offshore; illite, kaolinite, and chlorite from nearshore were lower than offshore; calcite and aragonite were low nearshore and higher in the offshore; goethite was lower offshore and higher nearshore; and, finally, halite was high offshore and low nearshore. Surface sediments were divided into three groups based on sedimentary environment characteristics: Group 1 was distributed nearshore with strong dynamics, Group 2 in bays and nearshore with weak dynamics, and Group 3 was distributed offshore with quiet dynamics. The origin of the sediments was weathering and erosion from the mainland and islands under the river and sea processes in the Gulf of Tonkin with quartz, illite, kaolinite, feldspar, chlorite, and montmorillonite found present in the sediment. Geochemical processes produced goethite, gibbsite, halite, and pyrite in the sediments while biological substances produced calcite and aragonite. https://www.vietnamscience.vjst.vn/index.php/vjste/article/view/1142grain sizeGulf of TonkinmineralsVietnam |
| spellingShingle | Dang Hoai Nhon Nguyen Van Thao Tran Duc Thanh Nguyen Dac Ve Bui Van Vuong Lai Thi Bich Thuy Bui Thi Thanh Loan Hoang Thi Chien Duong Thanh Nghi Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin Vietnam Journal of Science, Technology and Engineering grain size Gulf of Tonkin minerals Vietnam |
| title | Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin |
| title_full | Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin |
| title_fullStr | Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin |
| title_full_unstemmed | Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin |
| title_short | Characteristic and distribution of grain sizes and minerals in sediments from the Vietnamese Gulf of Tonkin |
| title_sort | characteristic and distribution of grain sizes and minerals in sediments from the vietnamese gulf of tonkin |
| topic | grain size Gulf of Tonkin minerals Vietnam |
| url | https://www.vietnamscience.vjst.vn/index.php/vjste/article/view/1142 |
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