胡高伟,刘显童,陈扬,等. 莺歌海盆地黄流组一段沉积物源综合识别[J]. 海洋地质前沿,2024,40(3):1-14. DOI: 10.16028/j.1009-2722.2023.071
    引用本文: 胡高伟,刘显童,陈扬,等. 莺歌海盆地黄流组一段沉积物源综合识别[J]. 海洋地质前沿,2024,40(3):1-14. DOI: 10.16028/j.1009-2722.2023.071
    HU Gaowei, LIU Xiantong, CHEN Yang, et al. Comprehensive identification of sediment source in the first member of Huangliu Formation in Yinggehai Basin[J]. Marine Geology Frontiers, 2024, 40(3): 1-14. DOI: 10.16028/j.1009-2722.2023.071
    Citation: HU Gaowei, LIU Xiantong, CHEN Yang, et al. Comprehensive identification of sediment source in the first member of Huangliu Formation in Yinggehai Basin[J]. Marine Geology Frontiers, 2024, 40(3): 1-14. DOI: 10.16028/j.1009-2722.2023.071

    莺歌海盆地黄流组一段沉积物源综合识别

    Comprehensive identification of sediment source in the first member of Huangliu Formation in Yinggehai Basin

    • 摘要: 通过重矿物直观比对法确定了莺歌海盆地黄流组一段沉积物中各物源的重矿物特征,并对古母岩特征进行初步认识。研究区周围存在三大主要物源,分别来自海南岛、越南北部(红河)及越南中部。结果表明,越南物源以沉积型铁矿物、钛矿等物沉积岩型重矿物组合为主;海南物源以锆石、电气石、金红石等酸性火山岩型重矿物组合为主。基于余弦距离及皮尔逊相关系数的谱系聚类结果表明,莺歌海盆地黄流组一段锆石、电气石、金红石、锐钛矿、白钛矿等矿物受成岩作用影响较小,为该时期的稳定矿物组合,综合稳定重矿物复杂拓扑网络、地震属性、地震剖面及锆石年龄等方法对主导物源区进行划分,确定了莺歌海盆地东方13区及东方1区的部分扇体主要受控于越北红河物源,东方13区及东方29区的绝大多数扇体主要受越中物源及海南北部物源的双重影响,乐东区受控于海南南部物源,建立了综合考虑重矿物组合-地震-锆石综合物源识别方法。控于海南南部物源的古物源分布模式,建立了重矿物-地震特征-锆石年代学的物源识别方法。

       

      Abstract: The characteristics of heavy mineral assemblages from each sediment provenance of the Huangliu Formation in the Yinggehai Basin were determined in intuitive comparison method, from which the characteristics of ancient parent rockswere clarified. There are three main provenances around the research area, namely Hainan Island, northern Vietnam (Red River), and central Vietnam. Results indicate that the provenances from Vietnam are mainly composed of sedimentary rock typed iron and titanium minerals, and other sedimentary rock typed ones alike, while the Hainan provenance is mainly composed of acidic volcanic rock typed heavy mineral assemblages including zircon, tourmaline, and rutile. The spectral clustering results based on cosine distance and Pearson correlation coefficient show that zircon, tourmaline, rutile, anatase, and perovskite in the Huangliu Formation are less affected by diagenesis and thus are stable minerals . The dominant source areas were divided using complex topological networks of stable heavy minerals, seismic attributes, seismic profiles, and zircon ages. It was determined that some fan bodies in the Dongfang 13 and 1 areas of the Yinggehai Basin were controlled mostly by the northern Vietnam (Red River) provenance, while the vast majority of fans in the Dongfang 13 and 29 areas were affected jointly by the central Vietnam and northern Hainan provenances. The Ledong area was controlled by the southern Hainan source. Therefore, a comprehensive method to determine provenance was established combining heavy mineral assemblage, seismic attribute, and zircon chronology.

       

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