tailieunhanh - Đặc điểm địa mạo khu vực Tây Nam trũng sâu Biển Đông

Dựa trên các đặc điểm địa mạo kết hợp với kết quả khảo sát thực địa và phân tích mẫu của khu vực nghiên cứu, các tác giả chỉ ra những khu vực có triển vọng kết hạch, kết vỏ Fe - Mn, cụ thể là: các Gaiot, bề mặt núi lửa trẻ có triển vọng về vỏ Fe - Mn, còn trũng sâu tách giãn là có khả năng tích tụ kết hạch Fe - Mn. | Journal of Mining and Earth Sciences Vol. 62 Issue 4 2021 29 - 37 29 Morphological characteristics of the southwest deep - depression East Sea region Bat Van Dang 1 Chi Kim Thi Ngo 2 Binh Van Phan 2 Hiep Huu Nguyen2 Hau Vinh Bui 2 Hien Thu Thi Bui 2 1 Vietnam Union of Geological Sciences Vietnam 2 Faculty of Geosciences and Geoengineering Hanoi University of Mining and Geology Vietnam ARTICLE INFO ABSTRACT Article history Morphological characteristics of the southwestern deep-depression East Received 25th May 2021 Sea have been defined based on the subdivision into co-origin surfaces. Accepted 28th July 2021 The results show that the study area has 16 morphological units Available online 31th Aug. 2021 including Horizontal surface slightly inclined surface continental shelf Keywords accumulation 200 300 m depth The surface is slightly inclined and wavy East Sea accumulates the outer shelf 300 700 m deep Horizontal surface abrasive 500 700 m Guyot Abrasive horizontal surface Guyot depth Morphological characteristics. 1 300 1 600 m Abrasive horizontal surface Guyot depth -2 000 m The surface of the ancient volcanic crest is distributed at different depths Young volcanic surface 1 200 3 000 m deep Wavy accumulative plain continental rise 1 100 1 800 m deep Plain transport - accumulation plain depth 1 100 2 300 m The smooth plain transports accumulates depth 2 300 3 000 m The plain is divided by underground hills and mountains in the north 2 000 2 600 m deep The plain is strongly dissected of underground mountains 1 700 2 600 m deep Deep depression surface splits Tectonic slope surface continental slope 800 1 400 m depth Slope surface of the Northwestern underground mountain range 1 800 2 600 m Slope surface of the Southeastern underground mountain range 2000 2900 m. Based on the morphological characteristics of the study area field investigation and analytical results allowed us to capture the potential areas of the Fe - Mn nodule and crust namely morphological units