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| Classification and metallogenic characteristics of sea sand resources in Hainan Island |
| TONG Changliang |
| Institute of Marine Geological Survey of Hainan, Haikou 570206, China |
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Abstract The sea sand resources in Hainan Island are rich with good quality, and the reserves are at the forefront of the whole country. The ilmenite, zircon and monazite are superion sea sand resources in Hainan Island. According to utilization, the sea sand resources can be mainly divided into three types: zircon-titanium placer, quartz placer and building placer. Based on data collection and sorting, the author discussed the distribution, exploration level, resource reserve, sedimentary environment and resource potential of the different types of sea sand resources. The results show that the highly explored zircon-titanium placer is mainly distributed in the Holocene strata of coastal areas and submarine terraces in Eastern Hainan, with big scale, high grade and good development condition. The quartz placer and building placer predominate in Western Hainan with good quality and low impurity content. The exploration degree is not great due to tidal sand ridge and estuarine delta in the shallow marine area, but prospect of the sea sand resources is quite good because of wide distribution, large thickness and good sand quality, indicating that these areas are the most favorable areas for exploration in the future. The metallogenic characteristics of sea sand resources in Hainan Island are as follows: ①wide distribution, huge scale and good development condition; ②main occurrence in Holocene strata; ③large sedimentary thickness and good longitudinal continuity; ④good sand quality with rich heavy minerals.
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Received: 19 October 2017
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2018, Vol. 5 
