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    Groundwater Anomaly Related to CCS-CO2 Injection and the 2018 Hokkaido Eastern Iburi Earthquake in Japan
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    Abstract:
    Carbon capture and storage (CCS) is considered a key technology for reducing CO 2 emissions into the atmosphere. Nonetheless, there are concerns that if injected CO 2 migrates in the crust, it may trigger slip of pre-existing faults. In order to test if this is the case, covariations of carbon, hydrogen, and oxygen isotopes of groundwater measured from Uenae well, southern Hokkaido, Japan are reported. This well is located 13 km away from the injection point of the Tomakomai CCS project and 21 km from the epicenter of September 6 th , 2018 Hokkaido Eastern Iburi earthquake (M 6.7). Carbon isotope composition was constant from June 2015 to February 2018, and decreased significantly from April 2018 to November 2019, while total dissolved inorganic carbon (TDIC) content showed a corresponding increase. A decrease in radiocarbon and δ 13 C values suggests aquifer contamination by anthropogenic carbon, which could possibly be attributable to CCS-injected CO 2 . If such is the case, the CO 2 enriched fluid may have initially migrated through permeable channels, blocking the fluid flow from the source region, increasing pore pressure in the focal region and triggering the natural earthquake where the brittle crust is already critically stressed.
    Keywords:
    Epicenter
    Carbon fibers
    Previous British Museum datelists were published as follows: BM-I: Radiocarbon, 1 (1959), 81–6BM-V: Radiocarbon, 10 (1968), 1–7 BM-II: Radiocarbon, 2 (1960), 26–30BM-VI: Radiocarbon, 11, 2 (1969), 278–94 BM-III: Radiocarbon, 3 (1961), 39–45BM-VII: Radiocarbon, 13, 2 (1971), 157–88 BM-IV: Radiocarbon, 5 (1963), 104–8BM-VIII: Radiocarbon, 18, 1 (1976), 16–42 BM-IX: Radiocarbon, 19, 2 (1977), 143–60BM-XVII: Radiocarbon, 26, 1 (1984), 59–74 BM-X: Radiocarbon, 21, 1 (1979), 41–7BM-XVIII: Radiocarbon, 27, 3 (1985), 508–24 BM-XI: Radiocarbon, 21, 3 (1979), 339–52BM-XIX: Radiocarbon, 29, 1 (1987), 61–77 BM-XII: Radiocarbon23, 1 (1981), 14–23BM-XX: Radiocarbon, 29, 2 (1987), 177–96 BM-XIII: Radiocarbon, 24, 2 (1982), 151–70BM-XXI: Radiocarbon, 31, 1 (1989), 15–32 BM-XIV: Radiocarbon, 24, 3 (1982), 229–61BM-XXII: Radiocarbon, 33, 1 (1991), 51–68 BM-XV: Radiocarbon, 24, 3 (1982), 262–90BM-XXIII: Radiocarbon, 36, 1 (1994), 95–111 BM-XVI: Radiocarbon, 25, 1 (1983), 39–58BM-XXIV: Archaeometry, 40, 2 (1998), 413–37
    Accelerator mass spectrometry
    Absolute dating
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    The method of radiocarbon dating is currently widely used in archaeology work.The application of radiocarbon dating in Chinese archaeology has brought dramatic progress to its development.However,there are some problems in decades of use at the same time.Depending on the definition radiocarbon dating,the using condition in China and other related problem,this paper tries to explain the development of radiocarbon dating,in order to deepen the understanding of radiocarbon dating.
    Absolute dating
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    Accelerator mass spectrometry
    Absolute dating
    Radiometric dating
    This list consists of radiocarbon dates for geological samples measured from 1988 to 1990 at the resumed National Taiwan University (NTU) Radiocarbon Dating Laboratory. The NTU Radiocarbon Dating Laboratory was re-activated in 1988, after more than 14 years.
    Absolute dating
    Geochronology
    Accelerator mass spectrometry
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