搜索结果: 121-135 共查到“元素地球化学”相关记录258条 . 查询时间(1.567 秒)
Geochemical, stable isotope, and numerical modeling studies of sake and groundwater for identification of the location of sake production: A case study from Hakusan City, Japan
sake oxygen isotope Ishikawa groundwater modeling
2017/4/11
Understanding the source and chemical characteristics of groundwater used for sake production is an important strategy
for the quality management of sake brewing. Oxygen isotope ratios (δ18O) of 96 s...
Calcium-sulfate rich water in landslide area of Tateyama Caldera, northern central Japan
water geochemistry Tateyama caldera Ca–SO4 type water landslide sulfur isotopes
2017/4/11
Chemistry of surface waters from the Tateyama caldera known as a site of frequent landslides in northern central Japan
was investigated to obtain the relationship between their geochemical characteri...
Chemical characteristics and δ34S–SO4 2– of acid rain: Anthropogenic sulfate deposition and its impacts on CO2 consumption in the rural karst area of southwest China
karst rainwater chemical composition carbonate weathering southwest China
2017/4/11
We analyzed rainwater collected from Huanjiang, China, between June, 2007 and May, 2008, with the aim of understanding
the origin of the acid rain and its potential impacts on CO2 uptake by carbonate...
Rare earth element geochemistry of waters and suspended particles in alkaline lakes using extraction and sequential chemical methods
rare earth elements alkaline lake dissolved suspended particles sequential chemical extractions
2017/4/11
The concentrations of rare earth elements in the waters and suspended particles from two alkaline lakes in a carbonate
drainage basin of the South China Karst region were determined via ICP-MS. Seque...
Rare earth element geochemistry of waters and suspended particles in alkaline lakes using extraction and sequential chemical methods
rare earth elements alkaline lake dissolved suspended particles sequential chemical extract
2017/4/11
The concentrations of rare earth elements in the waters and suspended particles from two alkaline lakes in a carbonate
drainage basin of the South China Karst region were determined via ICP-MS. Seque...
Sequential chemical extraction of arsenic and related elements from the Holocene sediments of Sonargaon, Bangladesh, in relation to formation of arsenic-contaminated groundwater
BCR method ferrihydrite goethite chlorite chemical weathering
2017/4/11
The mineralogy and chemistry of aquifer sediments of As-contaminated groundwater in Sonargaon, Bangladesh were
analyzed to identify the host phases of As and to understand release mechanism of As int...
Origin of boron in the Damxung Co Salt Lake (central Tibet): Evidence from boron geochemistry and isotopes
boron geochemistry origin quaternary deposits Damxung Co Salt Lake Tibet
2017/4/11
The origin of boron in boron-rich salt lakes in the Tibetan Plateau has long been the subject of debate. The Damzung
Co Salt Lake in central Tibet has high boron concentrations (B = 276–313 mg/L) and...
Geochemistry and chemostratigraphy of the Colón-Mito Juan units (Campanian–Maastrichtian), Venezuela: Implications for provenance, depositional conditions, and stratigraphic subdivision
geochemistry chemostratigraphy Colón-Mito Juan sequence stratigraphic subdivision Lake Maracaibo
2017/4/11
A geochemical and chemostratigraphical study was undertaken on Campanian–Maastrichtian sedimentary rocks (the
Colón-Mito Juan sequence and the upper La Luna Formation) in the southwestern Maracaibo B...
Are existing drinking water sources safe from As contamination in Hanam province, Vietnam?
arsenic contamination Hanam province Vietnam rainwater safe drinking wate
2017/4/11
This study investigated arsenic (As) concentrations in existing drinking water sources in Hanam province, Vietnam.
Sand-filtered groundwater, piped water, raw groundwater, and a type of drinking wate...
Simple relationship between 26Al production rate and major elemental composition of meteorite samples
production rate 26Al terrestrial age howardite eucrite
2017/4/11
Estimation of 26Al (half-life = 705 kyr) content at the time of meteorite fall is required to calculate the terrestrial age
of meteorites using the 26Al content. Previous studies (e.g., Cressy, 1971;...
Elemental dissolution of basalts with ultra-pure water at 340°C and 40 MPa in a newly developed flow-type hydrothermal apparatus
hydrothermal system water–basalt reaction elemental dissolution flow-type experiment sub-terrestrial microbial ecosystem
2017/4/11
To simulate the discharge zone of hydrothermal systems in the laboratory, we developed a flow-type hydrothermal
apparatus that can reproduce water–rock reactions at elevated temperatures and pressure...
出露于阿尔金构造带南缘北部塔特勒克布拉克复式花岗质岩体东段的片麻状花岗岩, SiO2为71.88%~73.92%, Al2O3为13.39%~14.14%, K2O+Na2O为8.18%~8.85%, K2O/Na2O=1.54~2.33, A/CNK介于1.02~1.09之间, 属高钾钙碱性系列的弱过铝质岩石。该岩石富集大离子亲石元素(LILE), 亏损Nb、Ta、P、Ti等高场强元素(HFSE...
内蒙古哈达庙地区位于华北板块北缘，本文对区内花岗斑岩和闪长岩进行了锆石SHRIMP U-Pb 定年，其形成年龄分别为271±3Ma 和 267±3Ma。花岗斑岩具有高的SiO2含量（均值75.11%）、较高的K2O含量（均值5.06%）、低的MgO含量（均值0.43%）及低的Cr（均值6.70×10-6）、Ni（均值5.15×10-6）和V（均值26.86×10-6）含量，闪长岩与花岗斑岩相比具有...
银家沟杂岩体位于河南省灵宝市,主要岩石类型为二长花岗斑岩、钾长花岗斑岩和石英闪长斑岩,并有少量呈脉状产出的花岗闪长斑岩及闪长玢岩。该杂岩体是银家沟硫铁多金属矿床的成矿母岩。杂岩体的元素地球化学和锆石SHRIMP U-Pb年代学研究结果表明,银家沟杂岩体二长花岗斑岩、钾长花岗斑岩和花岗闪长斑岩的侵位年龄分别为147.5±2.1Ma、147.8±1.6Ma和142.0±2.0Ma,为晚侏罗世-早白垩世...
地球科学最基本的一个科学问题是地球的成分是什么。这个问题也是地球科学的一个终极问题。对这个问题的探索，需要综合地球科学的各个分支学科（包括地球物理、地球化学等），需要综合对地球不同部分的研究成果（包括大气、地壳、地幔和地核），才能对这个问题有所回答。因此，地球的成分是一个提纲挈领性的科学问题。其中，地核的成分是这个总问题下的一个分问题。对地核成分的研究是一个综合性极强的研究，需要各个学科使用最先进...