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    陈皓, 何磊, 叶思源, 韩宗珠, 袁红明, LawsEdward A.. 渤海湾北部滦河三角洲晚更新世以来沉积环境划分及碳埋藏速率的评价[J]. 中国地质, 2022, 49(5): 1555-1570. DOI: 10.12029/gc20220513
    引用本文: 陈皓, 何磊, 叶思源, 韩宗珠, 袁红明, LawsEdward A.. 渤海湾北部滦河三角洲晚更新世以来沉积环境划分及碳埋藏速率的评价[J]. 中国地质, 2022, 49(5): 1555-1570. DOI: 10.12029/gc20220513
    CHEN Hao, HE Lei, YE Siyuan, HAN Zongzhu, YUAN Hongming, Laws Edward A.. Differentiation of sedimentary environment and its carbon sequestration rate since the Late Pleistocene in the Luanhe River Delta, northern Bohai Bay[J]. GEOLOGY IN CHINA, 2022, 49(5): 1555-1570. DOI: 10.12029/gc20220513
    Citation: CHEN Hao, HE Lei, YE Siyuan, HAN Zongzhu, YUAN Hongming, Laws Edward A.. Differentiation of sedimentary environment and its carbon sequestration rate since the Late Pleistocene in the Luanhe River Delta, northern Bohai Bay[J]. GEOLOGY IN CHINA, 2022, 49(5): 1555-1570. DOI: 10.12029/gc20220513

    渤海湾北部滦河三角洲晚更新世以来沉积环境划分及碳埋藏速率的评价

    Differentiation of sedimentary environment and its carbon sequestration rate since the Late Pleistocene in the Luanhe River Delta, northern Bohai Bay

    • 摘要:
      研究目的 开展渤海湾北部滦河三角洲晚更新世以来不同沉积环境的划分,计算分析碳埋藏速率的大小和控制因素,进一步评价区域碳储能力。
      研究方法 本文对BXZK03孔岩芯开展晚更新世以来的古沉积环境恢复,并取样分析了包括粒度、年代(AMS14C和OSL)、含水量、有机碳、总碳和其他营养成分等在内的测试指标。
      研究结果 该孔晚更新世以来地层自下而上划分为泛滥平原、海滩沙脊、浅海、障壁沙坝(三角洲前缘)和潟湖的沉积环境单元,各沉积单元平均有机碳埋藏速率大小依次为:障壁沙坝51.47 g/(m2·a)>海滩沙脊32.59 g/(m2·a)>浅海7.82 g/(m2·a)>潟湖4.66 g/(m2·a)。总碳、有机碳与各营养元素具有显著(P < 0.01)线性相关关系,方差分析显示沉积速率和碳浓度分别是滦河三角洲碳埋藏速率的主要控制因素。
      结论 滦河三角洲沉积物中有机碳浓度相对较低,但是在全新世三角洲沉积速率较高,使得有机碳埋藏速率也相对较高,因此具有一定的碳储能力。

       

      Abstract:
      This paper is the result of marine and environmental geological survey engineering.
      Objective Carry out the differentiation of the sedimentary environments since the Late Pleistocene in the Luanhe River Delta, northern Bohai Bay, calculate and analyze the magnitude and controlling factors of the carbon sequestration rate (CSR), and further evaluate the regional carbon storage capacity.
      Methods In this paper, the reconstruction of the paleo-sedimentary environment since the Late Pleistocene was carried out on the core of hole BXZK03, and the parameters including particle size, age (AMS14C and OSL), water content, organic carbon, total carbon and other nutrients contents were sampled and analyzed.
      Results Since the Late Pleistocene, the strata were divided from bottom to top into five sedimentary environmental units, including flood plain, sand ridge, shallow sea, barrier sand bar (delta front), and lagoon. The CSRs were in the order of barrier sand bar 51.47 g/(m2 · a)> beach sand ridge 32.59 g / (m2 · a)> shallow sea 7.82 g/(m2 · a)> lagoon 4.66g / (m2 · a). Correlation analysis showed that there was a significant (P < 0.01) linear correlation between total carbon, organic carbon and each nutrient element. Variance analysis suggested that CSRs were likely controlled by the deposition rate and carbon concentration, respectively.
      Conclusions Although the organic carbon concentrations of sediments in Luanhe River Delta were relatively low, there were relatively high organic CSRs due to an elevated deposition rate during Holocene. Therefore the Holocene sediment has a remarkable carbon storage capacity.

       

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