{"title":"利用重矿物对小型洪泛平原湖泊进行源识别:华北东平湖案例研究","authors":"Yingying Chen, Wenjia Li, Yanyu Ji, Bingfu Jin, Shi-Yong Yu, Shiyue Chen","doi":"10.1007/s10933-024-00340-0","DOIUrl":null,"url":null,"abstract":"<p>Heavy minerals offer significant potential in elucidating sediment provenance in a variety of depositional systems. Nevertheless, source identification through heavy minerals remains a relatively understudied aspect, particularly for small floodplain lakes. Located in the North China Plain, Dongping Lake represents an exceptional site for validating the efficacy of this methodology. In this study, we collected 31 samples from Dongping Lake and surrounding floodplains and used analyses of heavy mineral compositions to establish the spatial distribution and characteristics of source regions and modern sediments of Dongping Lake. The heavy mineral assemblages demonstrate significant variations for sediments of the Yellow River and the Dawen River. The Yellow River floodplain samples are dominated by hornblende, epidote, limonite, and actinolite, with minor garnet, sphene, clinozoisite, etc. Samples from the Dawen River are dominated by epidote, hornblende, and actinolite, with minor sphene, clinozoisite, limonite, apatite, etc. Our data show that modern sediments of Dongping Lake exhibit significant variations in heavy mineral assemblages. The mineralogical composition at most sites except for the southeastern part of Dongping Lake is similar to that of sediments in the Yellow River, but differs markedly from that in the Dawen River. This variation indicates that the Yellow River contributes significant volumes of sediment to modern sediments of Dongping Lake. The results are also confirmed by the grain-size end-member unmixing analysis in modern sediments of the lake. Specifically, materials derived from the Yellow River exhibit a widespread dispersion across the lake, whilst those originated from the Dawen River are primarily concentrated in the river mouth. In addition, proximally eroded materials from the west shore of the lake also have some extent of influence, but are mainly distributed in the western region of the lake.</p>","PeriodicalId":16658,"journal":{"name":"Journal of Paleolimnology","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Source identification using heavy minerals for small floodplain lakes: a case study of Dongping Lake, North China\",\"authors\":\"Yingying Chen, Wenjia Li, Yanyu Ji, Bingfu Jin, Shi-Yong Yu, Shiyue Chen\",\"doi\":\"10.1007/s10933-024-00340-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Heavy minerals offer significant potential in elucidating sediment provenance in a variety of depositional systems. Nevertheless, source identification through heavy minerals remains a relatively understudied aspect, particularly for small floodplain lakes. Located in the North China Plain, Dongping Lake represents an exceptional site for validating the efficacy of this methodology. In this study, we collected 31 samples from Dongping Lake and surrounding floodplains and used analyses of heavy mineral compositions to establish the spatial distribution and characteristics of source regions and modern sediments of Dongping Lake. The heavy mineral assemblages demonstrate significant variations for sediments of the Yellow River and the Dawen River. The Yellow River floodplain samples are dominated by hornblende, epidote, limonite, and actinolite, with minor garnet, sphene, clinozoisite, etc. Samples from the Dawen River are dominated by epidote, hornblende, and actinolite, with minor sphene, clinozoisite, limonite, apatite, etc. Our data show that modern sediments of Dongping Lake exhibit significant variations in heavy mineral assemblages. The mineralogical composition at most sites except for the southeastern part of Dongping Lake is similar to that of sediments in the Yellow River, but differs markedly from that in the Dawen River. This variation indicates that the Yellow River contributes significant volumes of sediment to modern sediments of Dongping Lake. The results are also confirmed by the grain-size end-member unmixing analysis in modern sediments of the lake. Specifically, materials derived from the Yellow River exhibit a widespread dispersion across the lake, whilst those originated from the Dawen River are primarily concentrated in the river mouth. In addition, proximally eroded materials from the west shore of the lake also have some extent of influence, but are mainly distributed in the western region of the lake.</p>\",\"PeriodicalId\":16658,\"journal\":{\"name\":\"Journal of Paleolimnology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2024-09-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Paleolimnology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1007/s10933-024-00340-0\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Paleolimnology","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1007/s10933-024-00340-0","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Source identification using heavy minerals for small floodplain lakes: a case study of Dongping Lake, North China
Heavy minerals offer significant potential in elucidating sediment provenance in a variety of depositional systems. Nevertheless, source identification through heavy minerals remains a relatively understudied aspect, particularly for small floodplain lakes. Located in the North China Plain, Dongping Lake represents an exceptional site for validating the efficacy of this methodology. In this study, we collected 31 samples from Dongping Lake and surrounding floodplains and used analyses of heavy mineral compositions to establish the spatial distribution and characteristics of source regions and modern sediments of Dongping Lake. The heavy mineral assemblages demonstrate significant variations for sediments of the Yellow River and the Dawen River. The Yellow River floodplain samples are dominated by hornblende, epidote, limonite, and actinolite, with minor garnet, sphene, clinozoisite, etc. Samples from the Dawen River are dominated by epidote, hornblende, and actinolite, with minor sphene, clinozoisite, limonite, apatite, etc. Our data show that modern sediments of Dongping Lake exhibit significant variations in heavy mineral assemblages. The mineralogical composition at most sites except for the southeastern part of Dongping Lake is similar to that of sediments in the Yellow River, but differs markedly from that in the Dawen River. This variation indicates that the Yellow River contributes significant volumes of sediment to modern sediments of Dongping Lake. The results are also confirmed by the grain-size end-member unmixing analysis in modern sediments of the lake. Specifically, materials derived from the Yellow River exhibit a widespread dispersion across the lake, whilst those originated from the Dawen River are primarily concentrated in the river mouth. In addition, proximally eroded materials from the west shore of the lake also have some extent of influence, but are mainly distributed in the western region of the lake.
期刊介绍:
The realization that a historical perspective is often useful, if not essential, to the understanding of most limnological processes has resulted in the recent surge of interest in paleolimnology. The main aim of the Journal of Paleolimnology is the provision of a vehicle for the rapid dissemination of original scientific work dealing with the reconstruction of lake histories. Although the majority of papers deal with lakes, paleoenvironmental studies of river, wetland, peatland and estuary systems are also eligible for publication.
The Journal of Paleolimnology, like the subject itself, is multidisciplinary in nature, and papers are published that are concerned with all aspects (e.g. biological, chemical, physical, geological, etc.) of the reconstruction and interpretation of lake histories. Both applied and more theoretical papers are equally encouraged. The Journal of Paleolimnology will continue to be a major repository for papers dealing with climatic change, as well as other pressing topics, such as global environmental change, lake acidification, eutrophication, long-term monitoring, and other aspects of lake ontogeny. Taxonomic and methodological papers are also acceptable provided they are of relatively broad interest. New equipment designs are frequently featured. In addition to original data and ideas, the Journal of Paleolimnology also publishes review articles, commentaries and program announcements. A relevant Book Review Section is also featured.