Suitability evaluation of the exploitation and utilization of marine sand resources for construction: Taking the east exit of Qiongzhou Strait as an example
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摘要:
经济的快速发展, 对砂石料的需求巨大, 海砂的开发成为当前的热点。琼州海峡东口海砂资源丰富, 资源潜力概算可达数十亿方。依据前期调查数据, 选取含泥量、含砂量、粒级、海砂厚度、水深和离岸距离6类指标, 采用层次分析法, 构造判断矩阵计算评价因子的权重, 运用ArcGIS空间分析功能进行叠加, 对琼州海峡东口的海砂进行了开发适宜性评价。结果表明: 经计算将研究区分为开发适宜性好、较好、中等、较差、差5个等级, 其中浅滩区域海砂规模大、质量好、水深浅和开采环境影响小, 其开发适宜性最佳。分析了不同的指标对海砂开发适宜性的影响, 在浅滩区, 厚度和含砂量指标贡献较大; 在近岸海湾, 环境影响是主要因子; 在琼州海峡深槽区, 水深条件则成为海砂开发的主要限制条件。根据海砂资源的特点, 建立了以资源自然属性、开发技术条件、生态环境影响和行政管理为主要因子的海砂开发利用适宜性评价体系, 具体工作可选取不同的指标开展评价。研究结果可以为研究区海砂的开发利用和其他区域海砂开发适宜性评价提供参考。
Abstract:With the rapid development of economy, there is a huge demand for sand and gravel, and the development of marine sand has become a current hot spot. The east exit of Qiongzhou Strait is rich in marine sand resources, and its resource potential is in the billions of square meters. This paper evaluates the suitability of exploitation and utilization of marine sand in the east exit of Qiongzhou Strait.Six indicators of mud content, sand content, grain size, sea sand thickness, water depth and offshore distance are considered.The collected data are analyzed using analytic hierarchy process, where in the weights of considered indicators are calculated and superimposed based on constructed judgment matrix and ArcGIS spatial analysis. Furthermore, the study area are divided into five grades of exploitation suitability. It is found that the marine sand in the shoal area has the best exploitation suitability because of its large scale, good quality, shallow water depth and little influence on mining environment.In addition, this paper analyses the influence of different indicators on the suitability of marine sand exploitation. In the shoal area, the thickness and sand content contribute greatly. In near shore bay, environmental impact is the main factor. In the deep trough area, the water depth becomes the main restrictive condition for marine sand exploitation. Finally, this paper establishes a marine sand exploitation and utilization suitability evaluation system based on key factors of natural property of resources, technical conditions of exploitation, ecological environment impact and administrative management.
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图 2 海砂开发适宜性评价体系图
Figure 2. Evaluation system chart of marine sand development suitability
图 4 海砂开发利用适宜性分区图
Figure 4. Suitability zoning map of marine sand exploration and utilization
表 1 标度及其含义
Table 1. Scale and its meaning
标度值 含义 1 B2与B1同等重要 3 B2比B1稍微重要 5 B2比B1明显重要 7 B2比B1强烈重要 9 B2比B1极端重要 2, 4, 6, 8 2，4，6，8分别表示相邻判断的中值 
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表 2 平均随机一致性指标
Table 2. Average random consistency index
阶数 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 RI 0 0 0.58 0.90 1.12 1.24 1.32 1.41 1.45 1.49 1.52 1.54 1.56 1.58 1.59
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表 3 C1层判断矩阵(含泥量)
Table 3. Judgment matrix of the C1 layer(mud content)
C1 >40% [20%, 40%] [5%, 20%) < 5% 权重 >40% 1 1/4 1/7 1/9 0.043 [20%, 40%] 4 1 1/5 1/7 0.100 [5%, 20%) 7 5 1 1/3 0.288 < 5% 9 7 3 1 0.569
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表 4 C2层判断矩阵(含砂量)
Table 4. Judgment matrix of the C2 layer(sand content)
C2 < 50% [50%, 60%) [60%, 70%) [70%, 80%) [80%, 90%] >90% 权重 < 50% 1 1/2 1/4 1/6 1/7 1/8 0.030 [50%, 60%) 2 1 1/3 1/5 1/6 1/7 0.044 [60%, 70%) 4 3 1 1/3 1/5 1/6 0.083 [70%, 80%) 6 5 3 1 1/4 1/5 0.146 [80%, 90%] 7 6 5 4 1 1/3 0.265 >90% 8 7 6 5 3 1 0.432
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表 5 C3层判断矩阵(粒级)
Table 5. Judgment matrix of the C3 layer(particle size)
C3 粗砂 中砂 细砂 粉砂及以下 权重 粗砂 1 1/3 2 5 0.233 中砂 3 1 5 8 0.573 细砂 1/2 1/5 1 4 0.143 粉砂及以下 1/5 1/8 1/4 1 0.051
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表 6 C4层判断矩阵(厚度)
Table 6. Judgment matrix of the C4 layer(thickness)
C4 >30 m [20, 30] m [15, 20) m [5, 15) m < 5 m 权重 >30 m 1 5 6 8 9 0.545 [20, 30] m 1/5 1 4 5 7 0.238 [15, 20) m 1/6 1/4 1 3 5 0.120 [5, 15) m 1/8 1/5 1/3 1 3 0.063 >5 m 1/9 1/7 1/5 1/3 1 0.034
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表 7 C5层判断矩阵(水深)
Table 7. Judgment matrix of the C5 layer(water depth)
C5 >50 m [30, 50] m [15, 30) m < 15 m 权重 >50 m 1 1/5 1/6 1/9 0.043 [30, 50] m 5 1 1/4 1/5 0.129 [15, 30) m 6 4 1 1/3 0.276 < 15 m 9 5 3 1 0.552
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表 8 C6层判断矩阵(离岸距离)
Table 8. Judgment matrix of the C6 layer(Offshore distance)
C6 [0, 2) km [2, 5) km [5, 10) km [10, 15] km >15 km 权重 [0, 2) km 1 1/3 1/5 1/7 1/9 0.035 [2, 5) km 3 1 1/3 1/5 1/7 0.068 [5, 10) km 5 3 1 1/3 1/5 0.134 [10, 15] km 7 5 3 1 1/3 0.260 >15 km 9 7 5 3 1 0.503
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表 9 B1层判断矩阵
Table 9. Judgment matrix of B1 layer
B1 含泥量 含砂量 粒级 权重 含泥量 1 1 1/2 0.250 含砂量 1 1 1/2 0.250 粒级 2 2 1 0.500
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表 10 A层判断矩阵
Table 10. Judgment matrix of layer A
A 海砂质量 海砂资源规模 开采技术条件 环境影响 权重 海砂质量 1 1/3 1/2 1/2 0.124 海砂资源规模 3 1 2 1 0.365 开采技术条件 2 1/2 1 1 0.234 环境影响 2 1 1 1 0.277
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表 11 各指标的组合权重
Table 11. Combined weight of each index
层次A B1海砂质量 B2海砂资源规模 B3开采技术条件 B4环境影响 0.124 0.365 0.234 0.277 层次B C1含泥量 C2含砂量 C3粒级 C4厚度 C5水深 C6离岸距离 0.250 0.250 0.500 0.365 0.234 0.277 层次C 分级/% 权重 组合权重 分级/% 权重 组合权重 分级 权重 组合权重 分级/m 权重 组合权重 分级/m 权重 组合权重 分级/km 权重 组合权重 >40 0.043 0.001 3 < 50 0.030 0.000 9 粗砂 0.233 0.014 4 >30 0.545 0.198 9 >50 0.043 0.010 1 [0, 2) 0.035 0.009 7 [20, 40] 0.100 0.003 1 [50, 60) 0.044 0.001 4 中砂 0.573 0.035 5 [20, 30] 0.238 0.086 9 [30, 50] 0.129 0.030 2 [2, 5) 0.068 0.0188 [5, 20) 0.288 0.008 9 [60, 70) 0.083 0.002 6 细砂 0.143 0.008 9 [15, 20) 0.120 0.043 8 [15, 30) 0.276 0.064 6 [5, 10) 0.134 0.0371 < 5 0.569 0.017 6 [70, 80) 0.146 0.004 5 粉砂及以下 0.051 0.003 2 [5, 15) 0.063 0.023 0 15 0.552 0.129 2 [10, 15] 0.260 0.072 0 - [80, 90] 0.265 0.008 2 - < 5 0.034 0.0124 - >15 0.503 0.139 3 - >90 0.432 0.013 4 - - - -
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表 12 适宜程度分级表
Table 12. Grading of suitability
适宜程度 适宜性差 适宜性较差 适宜性中等 适宜性较好 适宜性好 分值 [0.076 0, 0.152 5) [0.152 5, 0.197 2) [0.197 2, 0.262 7) [0.262 7, 0.358 9) [0.358 9, 0.525 2]
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表 13 海砂资源开发利用适宜性评价指标体系
Table 13. Evaluation index system of suitability for exploitation and utilization of marine sand resources
目标层 宏观因子 评价因子 可选指标 海砂开发利用适宜性 资源的自然属性(地质特征) 平面规模 连续分布面积、长度、宽度 沉积厚度 砂层总厚度、单层厚度、可采厚度 夹层或盖层 盖层厚度、夹层数量、夹层厚度、夹层性质等 赋存状态 产状形态、是否出露、是否含夹层等 组分含量 含砾量、含砂量、含泥量 粒度特征 平均粒径、分选系数、细度模数、颗粒级配 有用矿物含量 石英、长石、重矿物等含量 有害物质 轻物质含量、硫化物含量、贝壳含量、有机物含量、云母含量、石粉含量、泥块含量 物理力学性能 密度、孔隙度、坚固性、碱集料反应 资源动态 沉积环境、补给冲淤 开发技术条件 气候条件 风速风向、极端天气、气温降水、大雾等 水动力条件 潮流、波浪、沿岸流等 地形地貌 水深、坡度、平整度、特殊地貌 工程地质 断裂、基底稳定性、海砂堆积稳定性等 环境地质 地质灾害、泥砂扩散条件等 生态环境影响(风险) 地质环境 对海岸的影响(如离岸距离)、对海底稳定性的影响、对海底冲淤的影响、对沉积物的污染等 生态环境 栖息地、产卵地、特殊生态功能区、生物聚集区等 水环境 悬沙扩散、化学污染、环流改变等 极端事件 风暴潮、海啸、灾害性海浪、海冰、台风等 行政管理 规划 矿产资源、国土空间、海洋功能、生态保护(如生态红线)等 管控 军事区、航道区、海底管线、旅游区、渔业区、工程建设区、特殊区域等
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[1] 曹雪晴, 张勇, 何拥军, 等. 中国近海建筑用海砂勘查回顾与面临的问题[J]. 海洋地质与第四纪地质, 2008, 28(3): 121-125. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ200803025.htmCao X Q, Zhang Y, He Y J, et al. Retrospect and discussion of surveys for construction sand in China offshore area[J]. Marine Geology & Quaternary Geology, 2008, 28(3): 121-125(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ200803025.htm [2] 仝长亮, 陈飞, 张匡华. 海南省海砂资源勘查开发现状与对策分析[J]. 海洋开发与管理, 2018, 35(3): 46-50. doi: 10.3969/j.issn.1005-9857.2018.03.009Tong C L, Chen F, Zhang K H. Current developing situation and the countermeasures of sea sand resources exploration in Hainan Province[J]. Ocean Development and Management, 2018, 35(3): 46-50(in Chinese with English abstract). doi: 10.3969/j.issn.1005-9857.2018.03.009 [3] 仝长亮. 海南省建筑用海砂资源保障对策研究[J]. 国土资源情报, 2019, 19(6): 47-50. https://www.cnki.com.cn/Article/CJFDTOTAL-GTZQ201906008.htmTong C L. Research on the guarantee countermeasures of marine sand resources for construction in Hainan Province[J]. Land and Resources Information, 2019, 19(6): 47-50(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-GTZQ201906008.htm [4] 吕一河, 傅微, 李婷, 等. 区域资源环境综合承载力研究进展与展望[J]. 地理科学进展, 2018, 37(1): 130-138. https://www.cnki.com.cn/Article/CJFDTOTAL-DLKJ201801014.htmLü Y H, Fu W, Li T, et al. Progress and prospects of research on integrated carrying capacity of regional resources and environment[J]. Progress in Geography, 2018, 37(1): 130-138(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DLKJ201801014.htm [5] 迪力沙提·亚库甫, 严金明, 李强. 基于生态导向与自然条件约束的青海省国土空间开发适宜性评价研究[J]. 地理与地理信息科学, 2019, 35(3): 94-98. doi: 10.3969/j.issn.1672-0504.2019.03.014Dilishati Y, Yan J M, Li Q. Research on suitability evaluation of land space development based on ecological guidance and natural conditions: A case study of Qinghai Province[J]. Geography and Geo-Information Science, 2019, 35(3): 94-98(in Chinese with English abstract). doi: 10.3969/j.issn.1672-0504.2019.03.014 [6] 梅芹芹, 龚绪龙, 史雅栋, 等. 江苏沿海地区工程建设地质适宜性评价[J]. 地质学刊, 2018, 42(2): 317-322. doi: 10.3969/j.issn.1674-3636.2018.02.019Mei Q Q, Gong X L, Shi Y D, et al. On geological suitability evaluation of engineering construction in coastal Jiangsu area[J]. Journal of Geology, 2018, 42(2): 317-322(in Chinese with English abstract). doi: 10.3969/j.issn.1674-3636.2018.02.019 [7] 谭欣, 杨晓青, 黄大全, 等. 沈阳经济区建设用地开发适宜性评价[J]. 北京师范大学学报: 自然科学版, 2017, 53(5): 559-566. https://www.cnki.com.cn/Article/CJFDTOTAL-BSDZ201705010.htmTan X, Yang X Q, Huang D Q, et al. Suitability evaluation of construction land in Shenyang metropolitan area[J]. Journal of Beijing Normal University: Natural Science Edition, 2017, 53(5): 559-566(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-BSDZ201705010.htm [8] 吕敦玉, 余楚, 周爱国, 等. 青藏高原矿产资源开发的环境适宜性评价: 以西藏达孜-工布江达地区为例[J]. 水文地质工程地质, 2011, 38(4): 88-94. https://www.cnki.com.cn/Article/CJFDTOTAL-SWDG201104019.htmLü D Y, Yu C, Zhou A G, et al. Environment suitability of mineral resources development over Tibetan Plateau: A case study of Dazi-Gongbo' Gyamda, Tibet[J]. Hydrogeology and Engineering Geology, 2011, 38(4): 88-94(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SWDG201104019.htm [9] 王圣洁, 刘锡清, 戴勤奋, 等. 中国海砂资源分布特征及找矿方向[J]. 海洋地质与第四纪地质, 2003, 23(3): 83-89. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ200303013.htmWang S J, Liu X Q, Dai Q F, et al. Distribution characteristics of marine aggregate resources and potential prospect in China[J]. Marine Geology & Quaternary Geology, 2003, 23(3): 83-89(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ200303013.htm [10] 仝长亮, 黎刚, 陈飞, 等. 海南岛东北部海域海砂资源特征及成因[J]. 海洋地质前沿, 2018, 34(1): 12-19. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT201801003.htmTong C L, Li G, Chen F, et al. Geological characteristics and origin of marine sands in the northeast sea off Hainan Island[J]. Marine Geology Frontiers, 2018, 34(1): 12-19(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT201801003.htm [11] 仝长亮, 张匡华, 陈飞, 等. 海南岛北部海域海砂资源潜力评价[J]. 中国地质, 2020, 47(5): 1567-1575. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202005022.htmTong C L, Zhang K H, Chen F, et al. The potential evaluation of marine sand resources in the northern sea areas of Hainan Island[J]. Geology in China, 2020, 47(5): 1567-1575(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI202005022.htm [12] 张虎男, 陈伟光. 琼州海峡成因初探[J]. 海洋学报, 1987, 9(5): 594-602. https://www.cnki.com.cn/Article/CJFDTOTAL-SEAC198705008.htmZhang H N, Chen W G. On the origin of Qiongzhou Strait[J]. Acta Oceanologica Sinica, 1987, 9(5): 594-602(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-SEAC198705008.htm [13] 叶春池. 琼州海峡沉积与地形发育[J]. 热带地理, 1986, 6(4): 346-353. https://www.cnki.com.cn/Article/CJFDTOTAL-RDDD198604007.htmYe C C. Distribution of sediments and submarine topography of Qiongzhou Strait[J]. Tropical Geography, 1986, 6(4): 346-353(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-RDDD198604007.htm [14] 陈亮, 张玉芬, 李团结, 等. 琼州海峡及周边海域沉积环境及近万年以来沉积演化[J]. 地球科学: 中国地质大学学报, 2014, 39(6): 696-704. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201406005.htmChen L, Zhang Y F, Li T J, et al. Sedimentary environment and its evolution of Qiongzhou Strait and nearby seas since last ten thousand years[J]. Earth Science: Journal of China University of Geosciences, 2014, 39(6): 696-704(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX201406005.htm [15] 仝长亮, 陈飞, 张匡华. 海南岛东北部海域海砂资源分布特征及开发前景分析[J]. 中国矿业, 2019, 38(1): 58-65. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA201901011.htmTong C L, Chen F, Zhang K H. Analysis of the distribution and development of marine sand resources in the northeast sea of Hainan Island[J]. China Mining Magazine, 2019, 38(1): 58-65(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA201901011.htm [16] 程和琴, 胡红兵, 蒋智勇, 等. 琼州海峡东口底形平衡域谱分析[J]. 海洋工程, 2003, 21(4): 97-103. https://www.cnki.com.cn/Article/CJFDTOTAL-HYGC200304016.htmCheng H Q, Hu H B, Jiang Z Y, et al. Equilibrium range spectra analysis of nearshore bedforms in the east Qiongzhou Strait[J]. The Ocean Engineering, 2003, 21(4): 97-103(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYGC200304016.htm [17] 陈沈良. 琼州海峡南岸海岸动力地貌研究[J]. 热带地理, 1998, 17(3): 35-42. https://www.cnki.com.cn/Article/CJFDTOTAL-RDHY199803004.htmChen S L. Coastal dynamic geomorphological researches on south cosat of Qiongzhou Strait[J]. Tropic Oceanology, 1998, 17(3): 35-42(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-RDHY199803004.htm [18] 马瑶, 赵江南, 廖时理. 模糊层次分析法在西南印度洋中脊46°~52°E多金属硫化物远景区预测中的应用[J]. 地质科技通报, 2020, 39(6): 75-82. doi: 10.19509/j.cnki.dzkq.2020.0622Ma Y, Zhao J N, Liao S L. Application of fuzzy analytic hierarchy process to mineral prospectivity mapping of polymetallic sulfide deposits in the Southwest Indian ridge between 46° to 52°E[J]. Bulletin of Geological Science and Technology, 2020, 39(6): 75-82(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0622 [19] 廖启鹏, 陈茹, 黄士真. 基于模糊综合评判与GIS方法的废弃矿区景观评价[J]. 地质科技情报, 2019, 38(6): 241-250. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201906029.htmLiao Q P, Chen R, Huang S Z. Study on landscape evaluation of abandoned mining area based on fuzzy comprehensive evaluation and GIS[J]. Bulletin of Geological Science and Technology, 2019, 38(6): 241-250(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ201906029.htm [20] 徐建华. 现代地理学中的数学方法[M]. 北京: 高等教育出版社, 2002.Xu J H. Mathematical methods in contemporary geography[M]. Beijing: Higher Education Press, 2002(in Chinese). [21] 许振强. 辽东湾东部海砂开采环境效应[J]. 海洋地质与第四纪地质, 2012, 32(6): 27-34. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ201206008.htmXu Z Q. Environmental capacity assessment in eastern Liaodong Bay for sea sand mining[J]. Marine Geology & Quaternary Geology, 2012, 32(6): 27-34(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYDZ201206008.htm [22] 陈坚, 胡翼. 我国海砂资源的开发与对策[J]. 海洋地质动态, 2005, 21(7): 4-8. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT200507002.htmChen J, Hu Y. Development and countermeasures for sea sand resources in China[J]. Marine Geology Frontiers, 2005, 21(7): 4-8(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT200507002.htm [23] 彭钰琳, 马超, 陈云英, 等. 福建海砂开采现状及建议[J]. 海洋环境科学, 2014, 33(6): 954-957. https://www.cnki.com.cn/Article/CJFDTOTAL-HYHJ201406023.htmPeng Y L, Ma C, Chen Y Y, et al. Current situation and suggestions on exploiting sea sand of Fujian Province[J]. Marine Environmental Science, 2014, 33(6): 954-957(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HYHJ201406023.htm [24] 王焰新, 甘义群, 邓娅敏, 等. 海岸带海陆交互作用过程及其生态环境效应研究进展[J]. 地质科技通报, 2020, 39(1): 1-10. doi: 10.19509/j.cnki.dzkq.2020.0101Wang Y X, Gan Y Q, Deng Y M et al. Land-ocean interactions and their eco-environmental effects in the coastal zone: Current progress and future perspectives[J]. Bulletin of Geological Science and Technology, 2020, 39(1): 1-10(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0101 [25] 仝长亮. 海南岛海砂资源的分类特征及成矿特点分析[J]. 中国地质调查, 2018, 5(3): 74-80. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDC201803010.htmTong C L. Classification and metallogenic characteristics of sea sand resources in Hainan Island[J]. Geological Survey of China, 2018, 5(3): 74-80(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-DZDC201803010.htm [26] 仝长亮. 海南省滨海锆钛砂矿动态工业指标的概念模型[J]. 中国矿业, 2018, 27(6): 55-58. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA2018S1014.htmTong C L. Conceptual model of dynamic industrial index of the Zr-Ti sand deposit on offshore in Hainan Province[J]. China Mining Magazine, 2018, 27(6): 55-58(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKA2018S1014.htm -
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