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  • ratios
  • The key lies in measuring calcium: not simply how much is present in these bodily fluids, but also the ratios of different calcium isotopes. (earthmagazine.org)
  • The present box model is the first of its kind to assess the evolution of Zn isotope ratios in the human body. (rsc.org)
  • The model can also be adapted for other elements such as Ca, Mg or Cu whose isotope ratios are also investigated as new paleodietary or cancer diagnostic tools. (rsc.org)
  • This considerably limits the comprehension and interpretation of the variability of Zn isotope ratios in human tissues and their application to the fossil remains of past hominins. (rsc.org)
  • 2006) Use of isotope ratios to assess sources of Pb and Zn dispersed in the environment during mining and ore processing within the Orlovka-Spokoinoe mining site (Russia). (nhm.ac.uk)
  • 2017
  • 2017) Geodynamic evolution of the western Tien Shan, Uzbekistan: Insights from U-Pb SHRIMP geochronology and Sr-Nd-Pb-Hf isotope mapping of granitoids. (nhm.ac.uk)
  • Carbonate
  • Mining Enterprise No. 1 also operates the Bawsaing lead-zinc mine on a PSC basis, producing both lead sulphide (galena) and lead carbonate (cerussite) ores and concentrates, and the Yadanatheingi Mine, which produces lead sulphide ores and concentrates. (lyellcollection.org)
  • bulk
  • Differential metamorphic effects on nitrogen isotopes in kerogen extracts and bulk rocks (Geochimica et Cosmochica Acta, /217/, 80-94. (washington.edu)
  • So far, these studies have constituted the bulk of the Zn isotope data available for human tissues. (rsc.org)
  • variations
  • Despite their limited number, they already highlight the great potential of Zn isotope variations to detect breast cancers based on blood values and to reconstruct past hominin diets using dental enamel data. (rsc.org)
  • deposits
  • The Rossland volcanics and the Slocan argillite, slate and limestones are important units in this terrane and contain significant mineral deposits such as found in the Slocan silver-lead-zinc camp. (gov.bc.ca)
  • As a result of this initiative, during the succeeding years the main lead-zinc areas in Myanmar have been mapped at a scale of 1:24 000 and individual lead-zinc deposits at a scale of 1:2400. (lyellcollection.org)
  • processes
  • I teach courses at the undergraduate and graduate level in isotope biogeochemistry, Earth system history, and the relationship between climate, surface processes and tectonics. (stanford.edu)
  • Thus
  • The humification of both dead moss and larch needles leads to retain the fraction where Zn bound most strongly thus releasing the lighter isotopes in solution and preserving the heavy isotopes in the humification products, in general accord with previous experimental and modeling works [GCA 75:7632-7643, (springeropen.com)
  • lead
  • The San Vicente zinc lead deposit is located in the Eastern Andes of Central Peru. (oregonstate.edu)
  • A linear lead isotope relationship that connects diverse deposit-types in the area appears to be the result of fluid mixing within a well connected hydrothermal plumbing system. (gov.bc.ca)
  • Almost the entire output of lead and zinc came from the Bawdwin Mine which, before 1942, was ranked as the sixth-largest producer of lead in the world ( Ministry of Mines 1970 ). (lyellcollection.org)
  • In 1938 Myanmar's output of refined lead, zinc concentrates and silver was 76 590 tons, 65 928 tons and 6 230 000 ounces, respectively. (lyellcollection.org)
  • By 1986 output levels had fallen to 5948 tons of lead, 7393 tons of zinc and 576 000 ounces of silver. (lyellcollection.org)
  • The rich sulphide ore, previously mined underground at Bawdwin and treated at Namtu, yielded a lead concentrate averaging 51.3% Pb, 14.1% Zn and 1.16% Cu and a zinc concentrate averaging 26.1% Zn and 18.1% Pb. (lyellcollection.org)
  • nature
  • When applied to the δ 66 Zn measured in blood, bones, or teeth, the present box model also offers insight into the isotope composition of the human diet, and therefore into its nature. (rsc.org)
  • Research
  • Pedosphere welcomes submissions from scientists around the world under a broad scope of topics relevant to timely, high quality original research findings, especially up-to-date achievements and advances in the entire field of soil science studies dealing with environmental science, ecology, agriculture, bioscience, geoscience, forestry, etc. (elsevier.com)
  • deposit
  • 2013) Sr-Nd-Pb-Hf isotope systematics of the Hugo Dummett Cu-Au porphyry deposit (Oyu Tolgoi, Mongolia). (nhm.ac.uk)
  • heavy
  • Using box model calculations, we investigated the dynamics of Zn isotope variability in blood and other body tissues as well as the consistency of the hypothesis of heavy Zn isotope accumulation through time in the human body. (rsc.org)
  • The larch (Larix gmelinii ) from North and South-facing slopes is enriched in heavy isotopes compared to soil reservoir while larch from Sphagnum peatbog is enriched in light isotopes. (springeropen.com)
  • study
  • The study of Zn isotope composition in body tissues is rapidly expanding and its fate is connected to the recent development of TIMS and MC-ICPMS techniques. (rsc.org)
  • techniques
  • CAMS is a signature facility of LLNL that uses diverse analytical techniques and state of the art instrumentation to develop and apply unique, ultra-sensitive isotope ratio measurement and ion beam analytical techniques to address a broad spectrum of scientific needs important to the Laboratory and the nation. (llnl.gov)