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New research provides evidence of strong early magnetic field around Earth（图）
New research evidence strong early magnetic field around Earth
2020/2/20
Deep within Earth, swirling liquid iron generates our planet's protective magnetic field. This magnetic field is invisible but is vital for life on Earth's surface: It shields the planet from harmful ...
In grade-school science textbooks, Earth's mantle is usually shown in a yellow-to-orange gradient, a nebulously defined layer between the crust and the core.To geologists, the mantle is much more than...
Research proposes new theories about nature of Earth’s iron
new theories nature Earth’s iron
2017/3/30
New research challenges the prevailing theory that the unique nature of Earth’s iron was the result of how its core was formed billions of years ago.The study opens the door to competing theories abou...
New supplemental activator for lead isotope analysis using TIMS
Pb isotope activator TIMS colloidal silica germanium
2017/4/12
We have devised a new supplementary activator for lead isotope measurements performed using thermal ionization
mass spectrometry (TIMS). The activator consisted of a mixture of 250 ppm Ge and 500 ppm...
New biostratigraphic and chemostratigraphic data from the Chicotte Formation (Llandovery,Anticosti Island,Laurentia) compared with the Viki core (Estonia,Baltica)
conodonts stable carbon isotopes Anticosti Estonia Llandovery Telychian
2009/10/21
Due to the lack of biostratigraphically useful graptolites in the crinoidal and reefal Chicotte Formation on Anticosti Island (Québec, Canada), the precise chronostratigraphic position of the formatio...
Can pressure promote hydrocarbon generation from organic matter?—New experimental proof
pressure pyrolysis natural gas carbon and hydrogen isotopes
2017/8/9
In order to investigate if pressure can increase the yield of the yield of methane and gaseous hydrocarbon as a whole, both anhydrous and hydrous isothermal pyrolysis experiments were performed on Fus...
New preconcentration technique of Zr, Nb, Mo, Hf, Ta and W employing coprecipitation with Ti compounds: Its application to Lu-Hf system and sequential Pb-Sr-Nd-Sm separation
coprecipitation Ti compounds Lu-Hf Pb-Sr-Nd isotope analysis preconcentration
2017/8/10
A new preconcentration technique of Zr, Nb, Mo, Hf, Ta and W has been invented employing coprecipiation with Ti compounds. Silicate samples were digested by HF with addition of Ti. Subsequent drying w...
New sequential separation procedure for Sr, Nd and Pb isotope ratio measurement in geological material using MC-ICP-MS and TIMS
Sr Nd isotope ratio MC-ICP-MS TIMS
2017/8/10
A new 3-step sequential separation chemistry for Sr, Nd and Pb from silicate samples, which is suitable for isotope analysis by MC-ICP-MS as well as TIMS, has been developed. The chemistry is designed...
Stable isotopes in deep-sea corals and a new mechanism for “vital effects”
Stable isotopes deep-sea corals new mechanism vital effects
2014/4/9
Offsets from isotopic equilibrium in biogenic carbonates have complicated paleoclimate reconstructions for decades. A new archive of climate, deep-sea corals, is used to evaluate the calcification pro...