SDRP Journal of Earth Sciences & Environmental Studies最新文献

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Geologic aspects (faults, landslides and volcanic dikes) of the Nateekin River shallow earthquake swarm of 15 June 2020 near Makushin Volcano, Unalaska Island, Alaska, U.S.A.-siftdesk 美国阿拉斯加州乌纳拉斯卡岛马库欣火山附近2020年6月15日纳捷金河浅层地震群的地质特征(断层、滑坡和火山堤

SDRP Journal of Earth Sciences & Environmental Studies Pub Date : 1900-01-01 DOI: 10.25177/jeses.6.1.ra.10786

John W. Reeder

{"title":"Geologic aspects (faults, landslides and volcanic dikes) of the Nateekin River shallow earthquake swarm of 15 June 2020 near Makushin Volcano, Unalaska Island, Alaska, U.S.A.-siftdesk","authors":"John W. Reeder","doi":"10.25177/jeses.6.1.ra.10786","DOIUrl":"https://doi.org/10.25177/jeses.6.1.ra.10786","url":null,"abstract":"Starting 15 June 2020, a shallow earthquake swarm occurred in the Nateekin River valley just east of Makushin Volcano of Unalaska Island, Alaska, U.S.A. Focal mechanism determinations were made on the larger earthquake events. These correlated with four known fault groups originally recognized during 1980-85 field work in this region. These are (a) numerous N 54° W ± striking normal faults, (b) prominent N 74° W ± striking normal faults, (c) N 50° E ± strike-slip faults, and (d) a N 36° E ± striking reverse faults. These fault groups correlate with known dikes for the region, which suggest magmatic intrusions are associated with this earthquake swarm. These faults reflect a predictable fault structure for a regional maximum horizontal tectonic stress direction of N 54° W ± with a localized spreading rift zone associated with Makushin Volcano that is striking N 74° W ±. This rift zone has a reactivated landslide and numerous nearby small landslides caused by this June/July earthquake swarm. This swarm sheds insight into the faulting, volcanic and geothermal processes of the region. Key words: Shallow earthquake swarm in a volcanic rift zone; four different seismic focal (fault) mechanisms recognized; associated active faults and landslides observed; related Holocene dikes and volcanic activity; regional maximum horizontal tectonic stress and magmatic processes; extensive geothermal resources.","PeriodicalId":307656,"journal":{"name":"SDRP Journal of Earth Sciences & Environmental Studies","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130897455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement of extraction methods of Malian Cashew nut shell liquid-siftdesk 马里腰果壳液筛提取方法的改进

SDRP Journal of Earth Sciences & Environmental Studies Pub Date : 1900-01-01 DOI: 10.25177/jeses.6.1.ra.10782

J. Valette

引用次数: 0

A review on the ecotoxicological effects of heavy metals on aquatic organisms-siftdesk 重金属对水生生物的生态毒理学效应研究进展

SDRP Journal of Earth Sciences & Environmental Studies Pub Date : 1900-01-01 DOI: 10.25177/jeses.6.2.ra.10797

Jiting Wang

{"title":"A review on the ecotoxicological effects of heavy metals on aquatic organisms-siftdesk","authors":"Jiting Wang","doi":"10.25177/jeses.6.2.ra.10797","DOIUrl":"https://doi.org/10.25177/jeses.6.2.ra.10797","url":null,"abstract":"In recent years, with the rapid development of the global economy, heavy metals have been widely used in industrial production and daily life because of their unique properties. This, however, has simultaneously led to heavy metal pollution due to various reasons. After entering the aquatic environment, heavy metals are not easily decomposed by microorganisms and become toxic when they reach a certain concentration. Heavy metals can easily enter the liver and other vital organs of aquatic organisms, where they accumulate and severely affect the growth and reproduction of these organisms. They can also threaten human health through the food chain. Therefore, heavy metal pollution has potential ecological and health risks. This paper summarizes the sources and hazards of heavy metals in water, the pattern of enrichment of heavy metals in aquatic organisms, the toxic effects of heavy metals on aquatic organisms, the tolerance mechanism of aquatic animals to heavy metals, and the factors affecting the toxicity of heavy metals. The authors put forward three feasible suggestions for the study of ecotoxicological effects of heavy metals on aquatic organisms in the future. The results of this study have considerable significance for aquaculture and environmental management and even for humans.","PeriodicalId":307656,"journal":{"name":"SDRP Journal of Earth Sciences & Environmental Studies","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133297122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

SDRP Journal of Earth Sciences &amp; Environmental Studies最新文献

SDRP Journal of Earth Sciences & Environmental Studies最新文献