策勒河下游风积地貌沉积物粒度特征及沙源分析
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李鑫鑫(1999-),女,硕士研究生,主要从事风沙地貌研究. E-mail: 18336585982@163.com |
收稿日期: 2023-10-12
修回日期: 2024-05-21
网络出版日期: 2025-08-14
基金资助
国家自然科学基金地区基金项目(42061003)
Grain size characteristics and sand source analysis of three aeolian landforms in the lower reaches of the Qira River floodplain
Received date: 2023-10-12
Revised date: 2024-05-21
Online published: 2025-08-14
沉积物的粒度特征记载了丰富的环境变化信息,对研究沙漠治理和荒漠化防治具有重要意义。运用粒度分析、粒级-标准偏差法和Sahu成因判别等研究方法进行分析,研究了不同风积地貌沉积物粒度特征和沉积环境的稳定性。结果表明:(1) 新月形沙丘、灌丛沙丘和低裸平沙地表层沉积物均以中砂、细砂、极细砂为优势粒级,新月形沙丘表层沉积物平均粒径最粗,为270.42 μm,灌丛沙丘表层沉积物平均粒径最细,为95.60 μm。(2) 三种地貌类型沉积物分选性较差,占比分别为74.47%、90.47%和66.7%,新月形沙丘表层沉积物呈现负偏分布、中等峰态,灌丛沙丘和低裸平沙地表层沉积物呈现对称分布、中等峰态和窄峰态。(3) 三种不同风积地貌环境敏感组分集中在22.4~399 μm之内,该组分对气候变化较为敏感,更能反应沉积环境的变化,表明该区域风沙活动强烈,沉积环境主体为风成沉积环境。(4) 灌丛沙丘表层沉积物完全属于风成环境沉积,新月形沙丘和低裸平沙地表层沉积物既有风成环境沉积,又有河流环境沉积。
李鑫鑫 , 毛东雷 , 来风兵 , 薛杰 , 何强强 , 马玉娇 . 策勒河下游风积地貌沉积物粒度特征及沙源分析[J]. 干旱区研究, 2024 , 41(8) : 1413 -1422 . DOI: 10.13866/j.azr.2024.08.15
The grain size characteristics of sediments provide extensive information on environmental change, which is of great importance for the study of desert management and for preventing desertification. The grain size characteristics and sedimentary environment stability of different aeolian landforms were studied using grain size analysis, the grain size-standard deviation method, and Sahu genetic discrimination. The results show that: (1) The surface sediments of barcrescent dune s, scrub dunes, and low bare flat sand are dominated by medium sand, fine sand, and extremely fine sand. The surface sediments were coarsest in barcrescent dunes and smallest in scrub dunes, with average grain sizes of 270.42 µm and 95.60 µm, respectively. (2) The sediment sorting of the three geomorphic types was poor, with proportions of 74.47%, 90.47% and 66.7%, respectively. The surface sediments of barcrescent dunes have a negatively skewed distribution and medium peak state, whereas the surface sediments of scrub dunes and low bare flat sand have a symmetrical distribution, medium peak state, and narrow peak state. (3) The environmentally sensitive components of the three different aeolian landforms were concentrated in the size range from 22.4-399 µm, which is more sensitive to climate change and therefore more able to reflect changes in the sedimentary environment, indicating that the aeolian sedimentary environment is mainly dominated by aeolian sedimentary environment. (4) The surface sediments of scrub dunes were found wholly in the aeolian environment, and the surface sediments of barchan dunes and low bare flat sand were found in both aeolian and fluvial environments.
表1 粒度分级标准Tab. 1 Particle size grading standard |
| 类别 | 粒级 | 范围/μm |
|---|---|---|
| 黏土 | 黏土 | 0~2 |
| 粉砂 | 极细粉砂 | 2~4 |
| 细粉砂 | 4~8 | |
| 中细粉砂 | 8~16 | |
| 粗粉砂 | 16~31 | |
| 极粗粉砂 | 31~63 | |
| 砂 | 极细砂 | 63~125 |
| 细砂 | 125~250 | |
| 中砂 | 250~500 | |
| 粗砂 | 500~1000 | |
| 极粗砂 | 1000~2000 |
表2 沉积环境判别公式及判定标准Tab. 2 Sedimentary environment identification formula and criteria |
| 环境鉴别 | 判别公式 | 判定标准 |
|---|---|---|
| 风成与海滩 | | Y<-2.7411,为风成沉积环境 Y>-2.7411,为海滩沉积环境 |
| 海滩和浅海 | | Y<65.3650,为海滩沉积环境 Y>65.3650,为浅海沉积环境 |
| 浅海与河流 | | Y<-7.4190,为河流沉积环境 Y>-7.4190,为浅海沉积环境 |
| 河流与浊流 | | Y<9.8433,为浊流沉积环境 Y>9.8433,为河流沉积环境 |
表3 新月形沙丘、灌丛沙丘和低裸平沙地沙波纹表层沙物质粒度参数Tab. 3 Particle size parameters of surface sand ripples in barchan dune, scrub dune and low bare flat sand |
| 沙丘 | 参数 | 最小值 | 最大值 | 均值±标准差 |
|---|---|---|---|---|
| 新月形沙丘 | 平均粒径/μm | 144.082 | 576.052 | 270.419±2.726 |
| 分选系数 | 1.489 | 2.001 | 1.817±0.282 | |
| 偏度 | -0.392 | 0.174 | -0.125±0.0131 | |
| 峰度 | 0.734 | 1.357 | 0.969±0.148 | |
| 灌丛沙丘 | 平均粒径/μm | 81.317 | 124.129 | 95.600±1.340 |
| 分选系数 | 1.360 | 2.354 | 1.647±0.140 | |
| 偏度 | -0.016 | 0.124 | 0.046±0.038 | |
| 峰度 | 0.809 | 0.971 | 0.917±0.041 | |
| 低裸平沙地 | 平均粒径/μm | 96.911 | 299.241 | 176.677±0.338 |
| 分选系数 | 1.549 | 2.671 | 2.197±0.381 | |
| 偏度 | -0.426 | 0.330 | 0.272±0.278 | |
| 峰度 | 0.636 | 1.213 | 0.864±0.219 |
| [1] |
陈京平, 余子莹, 杨帆, 等. 塔克拉玛干沙漠腹地沙尘暴对新月形沙丘表面粒度变化的影响[J]. 干旱区地理, 2023, 46(12): 1995-2004.
[
|
| [2] |
刘鑫, 高鑫. 塔克拉玛干沙漠南缘新月形沙丘移动特征[J]. 干旱区研究, 2024, 41(4): 661-673.
[
|
| [3] |
李小乐, 魏亚娟, 党晓宏, 等. 红砂灌丛沙堆土壤粒度组成及养分积累特征[J]. 干旱区研究, 2022, 39(3): 933-942.
[
|
| [4] |
孔霄, 来风兵, 陈蜀江, 等. 别里库姆沙漠胡杨回涡沙丘表层沉积物粒度特征[J]. 现代地质, 2021, 35(3): 657-664.
[
|
| [5] |
董治宝, 屈建军, 钱广强, 等. 库姆塔格沙漠风沙地貌区划[J]. 中国沙漠, 2011, 31(4): 805-814.
[
|
| [6] |
|
| [7] |
|
| [8] |
何强强, 毛东雷, 徐佳瑞, 等. 策勒绿洲-沙漠过渡带不同沙丘的沉积物粒度特征及沉积环境[J]. 水土保持研究, 2023, 30(3): 135-145.
[
|
| [9] |
朱文煜, 毛东雷. 植被沙障下沙丘的研究进展[J]. 生态科学, 2023, 42(2): 228-237.
[
|
| [10] |
任孝宗, 王嵩松, 王亚梅, 等. 浑善达克沙地西部新月形沙丘和抛物线沙丘共存区的地貌特征[J]. 干旱区研究, 2023, 40(12): 2016-2030.
[
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
| [15] |
|
| [16] |
王利杰, 肖锋军, 董治宝, 等. 柴达木盆地巨型沙波纹条带表层沉积物粒度和地球化学元素组成特征[J]. 干旱区地理, 2023, 46(11): 1826-1835.
[
|
| [17] |
李鹤, 丁占良, 尤莉, 等. 乌兰布和沙漠西北缘大型沙波纹的初步研究[J]. 干旱区资源与环境, 2020, 34(9): 129-136.
[
|
| [18] |
苏松领, 毛东雷, 蔡富艳, 等. 新疆策勒沙漠与砾质戈壁新月形沙丘表面沉积物粒度特征及其沉积环境[J]. 干旱区资源与环境, 2020, 34(8): 124-132.
[
|
| [19] |
俞胜清, 阿布都米基提, 周向玲, 等. 新疆喀拉库姆沙漠新月形沙丘不同部位粒度特征[J]. 中国沙漠, 2013, 33(6): 1629-1635.
[
|
| [20] |
何强强, 毛东雷, 朱文煜, 等. 新疆策勒绿洲-沙漠过渡带不同植被下的沙丘形态特征及沉积物粒度分析[J]. 水土保持学报, 2022, 36(6): 70-81.
[
|
| [21] |
|
| [22] |
|
| [23] |
高永, 丁延龙, 汪季, 等. 不同植物灌丛沙丘表面沉积物粒度变化及其固沙能力[J]. 农业工程学报, 2017, 33(22): 135-142.
[
|
| [24] |
郝榕荣, 杨怡红, 朱龙海, 等. 环境敏感因子在威海湾沉积环境中的应用比较[J]. 沉积学报, 2023, 41(3): 763-777.
[
|
| [25] |
安庆, 安萍, 徐汝汝, 等. 青藏高原不同地区沉积物的粒度特征与沉积环境判别公式适用性对比研究[J]. 聊城大学学报:自然科学版, 2017, 30(4): 37-47.
[
|
| [26] |
董治宝, 吕萍. 70年来中国风沙地貌学的发展[J]. 地理学报, 2020, 75(3): 509-528.
[
|
| [27] |
郎丽丽, 王训明, 哈斯, 等. 灌丛沙丘形成演化及环境指示意义研究的主要进展[J]. 地理学报, 2012, 67(11): 1526-1536.
[
|
| [28] |
王佩, 马倩, 朱元璞, 等. 新疆图开沙漠灌丛沙堆和抛物线形沙丘表层沉积物粒度特征及其沉积环境[J]. 干旱区地理, 2021, 44(6): 1644-1653.
[
|
| [29] |
贺振杰, 马龙, 吉力力·阿不都外力, 等. 哈萨克斯坦巴尔喀什湖沉积物粒度特征及其对区域环境变化的响应[J]. 干旱区地理, 2021, 44(5): 1317-1327.
[
|
| [30] |
穆桂金. 塔克拉玛干沙漠的形成时代及发展过程[J]. 干旱区地理, 1994, 17(3): 1-9.
[
|
| [31] |
田伟东, 杨军怀, 王树源, 等. 雅鲁藏布江河谷沙丘沉积物粒度特征及其环境指示[J]. 干旱区资源与环境, 2022, 36(1): 128-134.
[
|
| [32] |
|
| [33] |
|
| [34] |
|
| [35] |
|
/
| 〈 |
|
〉 |