搜索结果: 1-15 共查到“地球科学总论 Sediments”相关记录30条 . 查询时间(0.099 秒)
Arctic Lake Sediments As Records Of Climate Change Using Rock Magnetic Properties and Paleomagnetic Data
Earth sciences Arctic Lacustrine Lake el'gygytgyn Mineralogy Paleoclimate Rock magnetism
2014/10/22
Two lakes were studied in detail for rock magnetic properties: Lake El'gygytgyn, a crater lake formed 3.6Ma in the Far Eastern Russian Arctic, and Heimerdalsvatnet, a Holocene coastal lake located in ...
Th Effcts of Sea Level Change on the Molecular and Isotopic Composition of Sediments in the Cretaceous Western Interior Seaway: Oceanic Anoxic Event 3, Mesa Verde, CO, USA
Sea Level Change on the Molecular Isotopic Composition Sediments Cretaceous Western Interior Seaway Oceanic Anoxic Event 3 Mesa Verde CO USA
2014/10/22
Cretaceous Oceanic Anoxic Events (OAEs) represent periods of enhanced burial of organic matter in black shale in marine, continental margin, and epicontinental settings around the globe. Compared to o...
Environmental Reconstructions from Laminated Lake Sediments, Lake C3, Ellesmere Island, Canadian High Arctic
Environmental Reconstructions Laminated Lake Sediments Lake C3 Ellesmere Island Canadian High Arctic
2014/10/22
Sediments in Lake C3, Ellesmere Island, Nunavut Canada (82°50’N, 78°2’W) contain annual laminations (varves), which provide a record of sediment accumulation for 1900+ years. Varve totals are based on...
Exploring Isotopic Signatures of Lake El'gygytgyn Sediments for Evidence of Anoxia and Methane Cycling over the Past 50,000 Years
Exploring Isotopic Signatures Lake El'gygytgyn Sediments Evidence of Anoxia and Methane Cycling over the Past 50,000 Years
2014/10/21
Compound specific isotope analysis of lake sediments is a powerful tool in deciphering evidence of changing climatic and paleoenvironmental conditions through time. Isotopic analysis of Lake El’gygytg...
7700 Years of Holocene Climatic Variability in Sermilik Valley, Southeast Greenland Inferred From Lake Sediments
Holocene Climatic Variability Sermilik Valley Southeast Greenland Lake Sediments
2014/10/21
During the latter half of the 20th century until present day there has been an unprecedented rise in global annual mean temperatures accompanied by rising sea levels and a decrease in Northern Hemisph...
Chrysophycean Stomatocysts in the Upper Pleistocene and Holocene Sediments from Lake Hovsgol, Northern Mongolia
Chrysophycean Stomatocysts Diatoms Lake Hovsgol
2013/3/11
Siliceous stomatocysts of chrysophyte algae, along with diatom frustules, are well preserved in bottom sediments of various water bodies. Analysis of microfossils from a core sample of the Upper Pleis...
Banded Iron Formations (BIFs) and Associated Sediments Do Not Reflect the Physical and Chemical Properties of Early Precambrian Seas
Early Precambrian BIF Non-Marine Polar Regions
2013/3/7
Ring-in-ring structures in Australian Early Precambrian banded iron formation (BIF) were identified as bubbling mud wavelets, which lithified during temporary exposure, contradicting the alleged BIF d...
A Semi Automated Method for Laminated Sediments Analysis
Varve Laminated Sediment K-Nearest Neighbor
2013/3/7
We developed a software performing laminae counting, thickness measurements, spectral and wavelet analysis of laminated sediments embedded signal. We validated the software on varved sediments. Varved...
Geochemical Assessment of Impact of Mine Spoils on the Quality of Stream Sediments within the Obuasi Mines Environment, Ghana
Enrichment Factor Contamination Factor Geo-Accumulation Index
2013/3/7
Stream sediment samples were analyzed for the concentrations of some trace metals in the Obuasi gold mining environment, Ghana. The objectives were to determine the possible impacts of mining operatio...
Rapid Lab-Scale Microwave-Assisted Extraction and Analysis of Anthropogenic Organic Chemicals in River Sediments
Microwave Assisted Extraction Para-Cresol Phenanthrene
2013/3/7
An Ethos EZ Microwave Lab Station is employed in the development of a robust and efficient microwave extraction method for organic contaminants of anthropogenic origin in river sediments. The extracti...
Decastronema barattoloi (DE CASTRO),characteristic fossil of the Palaeocene and the Eocene peritidal sediments from the Adriatic carbonate platform
Decastronema barattoloi Adriatic Carbonate Platform Palaeocene Eocene peritidal environment
2009/12/7
The renewed deposition in the Palaeogene and the oldest part of the non-interrupted Palaeocene succession is characterized by the presence of Decastronema barattoloi (DE CASTRO), cyanobacterial tubes ...
Weichselian interstadial sediments on Jæren (SW Norway)–paleoenvironments and implications for ice sheet configuration
Weichselian interstadial sediments paleoenvironments implications ice sheet configuration
2009/12/3
Interstadial glaciomarine sediments at Jæren in south-western Norway have been investigated for their composition, distribution and age, and a model for the depositional environment is proposed....
Polycyclic aromatic hydrocarbons (PAHs) in Norwegian and Russian Arctic marine sediments:concentrations,geographical distribution and sources
Polycyclic aromatic hydrocarbons Norwegian Russian Arctic marine sediments
2009/12/3
Polycyclic aromatic hydrocarbons (PAHs) are key contaminants of concern under the Arctic Environmental Monitoring Programme (AMAP) due to their carcinogenic potential. The concentration of the differe...
Behaviour of the sediments in the Storegga Slide interpreted by the steady state concept
Behaviour of the sediments Storegga Slide steady state concept
2009/12/3
Two different sediment types were involved in the Storegga Slide.Marine clay sediments show contractive behaviour, and glacial deposits (tills and glacial debris flow deposits) were observed to be dil...
Initial Results of a new Free Fall-Cone Penetrometer (FF-CPT) for geotechnical in situ characterisation of soft marine sediments
Initial Results Free Fall-Cone Penetrometer situ characterisation soft marine sediments
2009/12/3
Two of the most crucial sediment physical parameters controlling slope stability and trigger mechanism of mass movements are shear strength and excess pore pressure. Since both of them require in situ...