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中国地质大学科学技术发展院张磊（博士生）， 赵来时等GPMR国家重点实验室 Geochimica et Cosmochimica Acta, 2017. Raman spectral, elemental, crystallinity, and oxygen-isotope variations in conodont apatite during diagenesis
牙形；石磷；灰石；古海洋；古气候
2021/10/21
近日，中国地质大学地质过程与矿产资源国家重点实验室赵来时教授团队在国际著名期刊《Geochimica et Cosmochimica Acta》发表题为Raman spectral, elemental, crystallinity, and oxygen-isotope variations in conodont apatite during diagenesis（牙形石磷灰石的拉曼光谱、元素...
Long-term variations of fumarole temperatures on Vulcano Island (Italy)
temperature fumarole heat release
2015/8/27
Fumarole temperatures are the ultimate results of many processes that are encountered by deep fluids during their passage to the surface. Here, the time variations of high-temperature fumaroles acquir...
Carbon isotope variations in diploptene for methane hydrate dissociation during the last glacial episode in the Japan Sea/East Sea
diploptene methane hydrate dissociation carbon isotope glacial–interglacial sea-level changes
2017/4/11
Two piston cores (06GHSA P1 and 06GHSA P6) taken from the Ulleung Basin of the Japan Sea/East Sea were examined
for the presence of an organic compound, diploptene (hopanoid 17α(H),21β(H)-hop-22(29)-...
Spatial and temporal variations of trace metals in sediments from the artificial Saemangeum Lake, Korea
Saemangeum Lake trace metal spatial distribution pollution status dike
2017/4/11
Trace metals in the surface sediments were measured to investigate the spatial distribution and annual variations of
metals (Cr, Co, Ni, Cu, Zn, As, Cd, Pb, Hg) and to evaluate the pollution status f...
Lateral sediment sources and knickzones as controls on spatio-temporal variations of sediment transport in an Alpine river
Sediment transport Critical shear stress Return period floods Particle entrainment Basin hydrology Swiss Alps
2014/5/20
Modern mixed alluvial-bedrock channels in mountainous areas provide natural laboratories for understanding the time scales at which coarse-grained material has been entrained and transported from thei...
Spatial variations of 226Ra, 228Ra, and 228Th activities in seawater from the eastern East China Sea
radium isotopes thorium isotopes East China Sea shelf currents seasonal variation water mixing scavenging
2017/4/11
A total of 74 surface and subsurface water samples at depths shallower than 200 m were collected in the eastern East
China Sea (ECS), and spatial and seasonal variations in 226Ra, 228Ra, and 228Th ac...
Diurnal variations of polar organic tracers in summer forest aerosols: A case study of a Quercus and Picea mixed forest in Hokkaido, Japan
secondary organic aerosol isoprene 2-methyltetrols levoglucosan
2017/4/12
We investigated the summertime formation of secondary organic aerosols (SOA) via the oxidation of isoprene, α/β-
pinene and β-caryophyllene in a Quercus crispula and Picea glehnii mast mixed forest l...
Monitoring of temporal and spatial variations in fumarole helium and carbon dioxide characteristics at Poás and Turrialba volcanoes, Costa Rica (2001-2009)
helium isotopes carbon isotopes Central America Costa Rica volcano monitoring
2017/8/9
We report results of a 9-year monitoring program that took place from 2001 to 2009 of the helium and carbon isotope (3He/4He, δ13C) and relative abundances ratios (CO2/3He) of fumarole sites at Poás a...
Seasonal and spatial variations analysis of pollution status of Ondo coastal environment Nigeria using principal component analysis
PCA sediments seasonal and spatial variation metals coastal area
2017/8/9
The variation in environmental quality of Ondo coast between seasons and sites were evaluated using principal component analysis (PCA). Seventeen metals were analysed in water and sediments with five ...
Seasonal variations in elemental composition of aerosols in Xiamen, China
environmental change aerosol concentration seasonal variation enrichment factor deposition flux
2017/8/9
Rapid industrialization and economic take-off in coastal cities of China have placed great strain on the environment. In the this study, 40 aerosol samples were collected in the coast of Xiamen, Fujia...
Areal Distribution and Bulk Rock Density Variations of the Welded İncesu Ignimbrite, Central Anatolia, Turkey
Cappadocia ignimbrites welding rock density
2009/7/8
The 2.8 Ma İncesu ignimbrite is one of the most densely welded ignimbrites of the Cappadocian Volcanic Province. Estimates of areal extent and volume reveal at least 7,760 km2 and 38 km3 of erupt...
Compositional Variations, Zoning Types and Petrogenetic Implications of Low-pressure Clinopyroxenes in the Neogene Alkaline Volcanic Rocks of Northeastern Turkey
clinopyroxene zoning low-pressure alkaline volcanics eastern Pontides Northeastern Turkey
2009/7/7
Clinopyroxene phenocrysts and microphenocrysts in different series of the Neogene alkaline volcanic rocks from the eastern Pontides (NE Turkey) record various stages in the crystallization conditions ...
Chemical Variations in Chlorite at the Los Humeros Geothermal System, Mexico
Chlorite Geothermal System Hydrothermal Mexico Octahedral Occupancy Phyllosilicate
2011/12/8
Abstract: The chemical composition of hydrothermal chlorite was determined by means of more than 200 electron microprobe analyses (EMPA) in almost all of the 70 chlorite-bearing samples taken from 5 b...
Structural variations induced by thermal treatment in lead feldspar (PbAl2Si2O8)
Structural variations thermal treatment lead feldspar
2012/3/30
Lead feldspar single crystals were annealed at T 5 1050 and 1000 8 C, starting from a disordered metastable configuration (PbFH, Qod5 0) and from an ordered configura-tion (PbFL, Qod5 0.89). Single-cr...
Calibration of excess thermodynamic properties and elastic constant variations due to the α ↔ β phase transition in quartz
Calibration thermodynamic properties
2012/3/30
Spontaneous strains for the a ↔b transition in quartz were determined from lattice parameter data collected by X-ray powder diffraction and neutron powder diffraction over the temperature range ...