搜索结果: 1-14 共查到“地球化学 Western U.S.”相关记录14条 . 查询时间(0.031 秒)
Two Types of Granites in the Western Yangtze Block and Their Implications for Regional Tectonic Evolution: Constraints from Geochemistry and Isotopic Data
I-type granite S-type granite geochemistry petrogenesis tectonic setting Western Yangtze Block
2018/4/10
In the western Yangtze Block, widespread Mesoproterozoic to Neoproterozoic rocks are the key to understanding the Precambrian tectonic-magmatic evolution of the region. However, their petrogenesis and...
Isotope geochemistry and its implications in the origin of Yangla copper deposit, western Yunnan, China
Yangla copper deposit isotopes western Yunnann
2017/4/10
The Yangla copper deposit is located in western Yunnan Province, China, with an estimated Cu reserve of approximately
1.2 million tons. It is a typical giant copper deposit, and its mining started on...
Dispersion of artificial caesium-134 and -137 in the western North Pacific one month after the Fukushima accident
Fukushima caesium western North Pacific zooplankton suspended solids
2017/4/11
In March 2011, an accident at the Fukushima Daiichi nuclear power plant (FNPP-AC) was caused by the Tohoku
earthquake and tsunami. Here we show the distribution of artificial caesium-134 and -137 (13...
Petrography and geochemistry of accreted oceanic fragments below the Western Cordillera of Ecuador
Ecuador Western Cordillera accreted oceanic terranes exhumation
2017/4/12
The Western Cordillera of Ecuador consists of Cretaceous crustal fragments of oceanic plateaux and superimposed
insular arcs, which were accreted to the northwestern South American margin during the ...
Helium isotopes of seawater in the Philippine Sea and the western North Pacific
3He/4He ratios abyssal current Philippine Sea North Pacific seawater
2017/8/9
We measured helium isotopic ratios of 84 seawater samples from various depths collected in the western North Pacific Ocean and the western Philippine Sea. The 3He/4He ratios varied significantly from ...
Geochemistry and U-Pb detrital zircon ages of metasedimentary rocks of the Lower Unit,Western Tatra Mountains (Slovakia)
Western Carpathians Cadomian and Variscan orogeny Metasedimentary rocks
2009/10/20
Acombined geochemical, isotopic and detrital zircon dating study has been carried out on metasedimentary rocks of the Lower Unit from the Western Tatra Mountains (Slovakia) forming an eastern border o...
δ18O and δ13C isotope investigation of the Late Glacial and early Holocene biogenic carbonates from the Lake Lednica sediments,western Poland
Stable isotopes δ18O and δ13C Late Glacial Early Holocene western Poland
2009/10/20
Stable isotope composition (δ18O and δ13C) of biogenic carbonates derived from the Lake Lednica sediments at Rybitwy, western Poland, was applied to obtain data on climatic changes during the Late Gla...
Geochemical characteristics and genesis of crude oils from Gasikule oilfield in Western Qaidam Basin, China
Qaidam basin Gasikule oilfield E31 and N21 pools crude oils origin
2017/8/9
The Gasikule oilfield, including a deep layer E31 and a shallow layer N21 pool, is the largest one in the Qaidam Basin and its crude oil output accounts for 80% of total oil output in the basin. In or...
Mineral-Chemical Constraints on the Miocene Calc-alkaline and Shoshonitic Volcanic Rocks of Western Turkey: Disequilibrium Phenocryst Assemblages as Indicators of Magma Storage and Mixing Conditions
western Anatolia magma evolution magma mixing compositional zoning disequilibrium parameters crustal magma chambers
2009/7/7
Early to Middle Miocene (22 to 15 Ma) volcanic activity across western Turkey produced a series of lavas and pyroclastic deposits with calc-alkaline and shoshonitic affinities. The erupted magmas show...
Petrography and Geochemistry of Paragneisses in the Çine Submassif of the Menderes Massif, Western Anatolia
paragneiss geochemistry metamorphism Menderes Massif western Anatolia
2009/7/7
The Menderes Massif, which covers a large area in western Turkey, is made up of Pan-African basement rocks and a Palaeozoic to Early Tertiary cover sequence. The study area is located in the Dalama an...
The Dikili-Çandarlı Volcanics, Western Turkey: Magmatic Interactions as Recorded by Petrographic and Geochemical Features
volcanism geochemistry mineral chemistry mixing Turkish Aegean region
2009/7/7
Located in the northwestern part of the Aegean region, Dikili-Çandarlı volcanic suite contains products representative for the western Anatolian Miocene volcanism. They can be divided into...
High sensitivity measurements of nitrogen isotopic ratios in coral skeletons from Palau, western Pacific: Temporal resolution and seasonal variation of nitrogen sources
coral skeleton δ15N value δ18O value δ13C value seasonal variation
2017/8/10
By using a step-wise heating method in conjunction with static vacuum mass spectrometry, we have measured at high temporal resolution (one month) the nitrogen isotopic ratio of a coral skeletal sample...
期刊信息
篇名
A Comparison on Accumulation Characteristics of 7Be and 137Cs in Lake Sediments and Surface Soils in Western Yunnan and Central Guizhou, China
语种
中文
撰写或编译
撰写
作者
Bai Z.G.,G.J.Wan,R.G.Huang and ...
期刊信息
篇名
The zircon SHRIMP chronology and trace element geochemistry of the Carboniferous volcanic rocks in western Tianshan Mountains
语种
英文
撰写或编译
撰写
作者
Zhu YF,Zhang LF,Gu LB,Guo X,Zhou J
第一作者单位
北京大学
刊...
