搜索结果: 1-15 共查到“地球科学总论 and composition”相关记录21条 . 查询时间(0.054 秒)
High Pressure Liquidus Studies of the Inferred Magma Composition of the Kiglapait Layered Intrusion, Labrador, Canada
High Pressure Liquidus Studies Inferred Magma Composition Kiglapait Layered Intrusion Labrador Canada
2014/10/22
The depth and nature of the source region of the Kiglapait Layered Intrusion, Labrador, Canada, were experimentally explored using rocks representing the troctolitic bulk composition of the intrusion....
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...
The Distribution, Composition, and Formation of Sahara Desert Microbialites From the Base of the Meski Plateau, outside Erfoud, Morocco
Distribution Composition Formation Sahara Desert Microbialites Base of the Meski Plateau outside Erfoud Morocco
2014/10/21
Seven distinctly different museum-quality concretionary morphotypes of elongate, spheroidal, banded, botryoidal, columnar, rosette, and speleothem in regolith at two small sites at the base of the Mes...
Textures and Rare Earth Elements Composition of Banded Iron Formations (BIF) at Njweng Prospect, Mbalam Iron Ore District, Southern Cameroon
REE BIF Martite Magnetite Alteration Njweng Cameroon
2013/3/11
The REE signature of banded iron formations (BIF) and martite-goethite mineralization of the Njweng ridge (South Cameroon) are used here to decipher the nature of the ocean during the period of BIF pr...
Preserved Sm-Nd Isotopic Composition as Useful Provenance Indicators in Neoproterozoic Sandstones in the Voltaian Basin, Ghana
Isotope Model Age Provenance Sandstone Voltaian Basin
2013/3/8
The provenance of sandstones derived from theLower Voltaian Kwahu-Morago Group and the Middle Voltaian Oti-Pendjari Group of the Neoproterozoic Voltaian basin are discriminated by their Sm-Nd Isotopic...
Flux and composition of settling particles across the continental margin of the Gulf of Lion: the role of dense shelf water cascading
Flux and composition particles the continental margin dense shelf water cascading
2010/1/21
Settling particles were collected using sediment traps deployed along three transects in the Lacaze-Duthiers and Cap de Creus canyons and the adjacent southern open slope from October 2005 to October ...
Organic matter sedimentation in the western Barents Sea region:Terrestrial and marine contribution based on isotopic composition and organic nitrogen content
Organic matter sedimentation western Barents Sea region Terrestrial and marine contribution
2009/12/2
Here, we present bulk organic geochemical data from a spatial grid of surface samples from the western Barents Sea region. The results show that the distribution of organic carbon in surface sediments...
Multi-scale comparisons of tree composition in Amazonian terra firme forests
Multi-scale comparisons tree composition Amazonian terra firme forests
2010/1/21
We explored the floristic composition of terra firme forests across Amazonia using 55 plots. Firstly, we examined the floristic patterns using both genus- and species-level data and found that the spe...
Large regional-scale variation in C3/C4 distribution pattern of Inner Mongolia steppe is revealed by grazer wool carbon isotope composition
regional-scale variation C3/C4 distribution pattern Inner Mongolia steppe isotope composition
2010/1/20
This work explored the spatial variation of C3/C4 distribution in the Inner Mongolia, P. R. China, steppe by geostatistical analysis of carbon isotope data of vegetation and sheep wool. Standing commu...
Bottom up effects on bacterioplankton growth and composition during summer-autumn transition in the open NW Mediterranean Sea
bacterioplankton growth composition summer-autumn transition NW Mediterranean Sea
2010/1/19
We examined the vertical and temporal dynamics of nutrients, ectoenzymatic activities under late summer-fall transition period (September–October 2004) in NW Mediterranean Sea in relation to temporal ...
Evaluation of the new UKCA climate-composition model–Part 1:The stratosphere
Evaluation new UKCA climate-composition model stratosphere
2010/2/5
The UK Chemistry and Aerosols (UKCA) model is a new aerosol-chemistry model coupled to the Met Office Unified Model capable of simulating composition and climate from the troposphere to the mesosphere...
Characterization of a thermodenuder-particle beam mass spectrometer system for the study of organic aerosol volatility and composition
Characterization thermodenuder-particle beam mass spectrometer system organic aerosol volatility and composition
2010/2/8
This paper describes the development and evaluation of a method for measuring the vapor pressure distribution and volatility-dependent mass spectrum of organic aerosol particles using a thermodenuder-...
Sinking rates and ballast composition of particles in the Atlantic Ocean:implications for the organic carbon fluxes to the deep ocean
Sinking rates ballast composition Atlantic Ocean organic carbon fluxes deep ocean
2010/1/19
The flux of materials to the deep sea is dominated by larger, organic-rich particles with sinking rates varying between a few meters and several hundred meters per day. Mineral ballast may regulate th...
Calcium isotopic composition of high-latitude proxy carrier Neogloboquadrina pachyderma (sin.)
isotopic composition high-latitude proxy carrier Neogloboquadrina pachyderma
2010/1/19
The accurate reconstruction of sea surface temperature (SST) history in climate-sensitive regions (e.g. tropical and polar oceans) became a challenging task in palaeoceanographic research. Biogenic sh...
Short term changes in zooplankton community during the summer-autumn transition in the open NW Mediterranean Sea:species composition,abundance and diversity
Short term changes zooplankton community summer-autumn transition species composition
2010/1/18
Short term changes in zooplankton community were investigated at a fixed station in offshore waters of the Ligurian Sea (DYNAPROC 2 cruise, September–October 2004). Mesozooplankton were sampled with v...