搜索结果: 1-15 共查到“理学 Calcite”相关记录30条 . 查询时间(0.062 秒)
中国地质大学科学技术发展院靳晓野, 李建威等, 资源学院/GPMR国家重点实验室. Economic Geology, 2021, Calcite U-Pb dating unravels the age and hydrothermal history of the giant Shuiyindong Carlin-type gold deposit in the Golden Triangle, South China
放射性；同位素；实验室；卡林型；金矿床
2021/10/14
近日，矿床学领域权威期刊《Economic Geology》刊发我校资源学院和GPMR国家重点实验室李建威教授团队和昆士兰大学放射性同位素实验室合作的研究成果——首次利用LA-(MC)-ICPMS方解石U-Pb测年法精确确定了卡林型金矿床的形成时代。这是该团队继卡林型金矿成矿流体来源与演化示踪研究“Noble gases fingerprint the source and evolution o...
Experimental study of rare earth element partitioning between calcite and sodium chloride solution at room temperature and pressure
rare earth elements lanthanide calcite partition coefficient calcium carbonate
2017/4/11
The rare earth element (REE) partition coefficients between calcite and aqueous solution were obtained experimentally
under the conditions of pH, ionic strength and REE concentration level in the par...
Magnetic separation of calcite and aragonite for use in radioactive carbon analysis
magnetic separation aragonite calcite cobalt Meigen’s solution peak intensity
2017/4/11
Aragonite and calcite often coexist; as such, separating these very similar minerals is an important step in undertaking
research on these two phases individually. One approach to discriminating betw...
A Macrocrystalline Attapulgite-Palygorski Occurrencein Calcite Veins
Macrocrystalline Attapulgite-Palygorski Occurrencein Calcite Veins
2011/10/19
Fibrousa ttapulgite-palygorskitwei,t h fibersg enerallym easurings everaml illimetersin length,i s found associatewd ith calcitei n hydrothermallyd epositedv eins.T he veinsr epresenftr acturef illing...
Impact of seawater pCO2 on calcification and Mg/Ca and Sr/Ca ratios in benthic foraminifera calcite: results from culturing experiments with Ammonia tepida
seawater pCO2 calcification and Mg/Ca and Sr/Ca ratios benthic foraminifera calcite culturing experiments Ammonia tepida
2010/1/21
Evidence of increasing concentrations of dissolved carbon dioxide, especially in the surface ocean and its associated impacts on calcifying organisms, is accumulating. Among these organisms, benthic a...
Evidence of microbial activity in siderite and calcite deposits on gastropod shells in Pliocene sand and clay beds from Lipovljani,Croatia
concretions fresh water diagenesis iron bacteria calcite siderite Pliocene Slavonia Croatia
2009/12/8
Freshwater Pliocene sand and clays found near Lipovljani in western Slavonia, Croatia, contain gastropods preserved by diagenetic mineral incrustations of alternating calcite and siderite. The geochem...
Identification of biogenetic calcite and aragonite using SEM
Calcite aragonite morphology geochemical difference Feigl’s staining method SEM
2009/12/7
Identification of calcite and aragonite is very important for studying different fossil or recent biomineralized skeletons. Problem occurs when scanning electron microscopy is used for studying calcit...
Shallow water dissolution of settling calcite at Station ALOHA
settling calcite Station ALOHA
2014/4/17
The dissolution of settling calcite at the Hawaii Ocean Time-Series Sta. ALOHA in the North Pacific is
examined using a calculation of the calcite saturation state based on 5 yr of alkalinity measure...
The potential for phosphorus pollution remediation by calcite precipitation in UK freshwaters
calcite calcium carbonate
2009/3/23
This paper examines the potential for calcium carbonate to reduce phosphate pollution in freshwaters by co-precipitation, a process known as a "self cleansing mechanism". Calcium carbonate saturation ...
Attempt to determine U-Th ages of calcite veins in the Nojima fault zone, Japan
calcite U-Th dating Nojima fault zone geochronology ICP-MS
2017/8/10
Fluids within fault zones can change the physical and chemical properties of fault materials and have a substantial influence on faulting. Therefore it is important to understand the nature and timing...
Homogeneous partition coefficients (D) for Ra and Ba in calcite were determined from coprecipitation experiments using the Continuous Addition Method (CAM). The D-values derived for Ra and Ba are:
DR...
Calcite production by coccolithophores in the south east Pacific Ocean
Calcite production coccolithophores south east Pacific Ocean
2010/1/18
BIOSOPE cruise covered an oceanographic transect through the centre of the South Pacific Gyre (SPG) from the Marquesas archipelago to the Peru-Chile upwelling (PCU). Water samples from 6 depths in the...
Production, oxygen respiration rates, and sinking velocity of copepod fecal pellets: Direct measurements of ballasting by opal and calcite
Production oxygen respiration rates sinking velocity copepod fecal pellets Direct measurements ballasting by opal calcite
2014/4/21
Production, oxygen uptake, and sinking velocity of copepod fecal pelletsegested byTemora longicorniswere measured using a nanoflagellate (Rhodomonassp.), a diatom (Thalassiosira weissflogii), or a coc...
Coccolithophores and calcite saturation state in the Baltic and Black Seas
Coccolithophores calcite saturation state Baltic Black Seas
2010/1/15
The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, ...
Copper incorporation in foraminiferal calcite:results from culturing experiments
Copper incorporation foraminiferal calcite culturing experiments
2010/1/14
A partition coefficient for copper (DCu) in foraminiferal calcite has been determined by culturing individuals of two benthic species under controlled laboratory conditions. The partition coefficient ...