Fig. 1 | Nature Communications

Fig. 1

From: Zhamanshin astrobleme provides evidence for carbonaceous chondrite and post-impact exchange between ejecta and Earth’s atmosphere

Fig. 1

Oxygen isotope systematics in tektites and impact glasses from this study. Mixing lines between siliciclastic and mafic materials (δ18O = 10.0‰ and 7.0‰, respectively) and air O2 are indicated, bullets represent 10% increments. Circles—moldavites; diamonds—irghizites; squares—basic splash forms; reversed triangle—composite splash-form; brown field—the range of common crustal rocks54 with revised data for San Carlos olivine76; green field—the recalculated oxygen isotope compositions of other tektites20 (Australasian tektites, North American tektites). The oxygen isotope compositions of the Earth’s mantle (star)76 and air (hexagon)22 are plotted. Carbonaceous chondrite groups other than CI have more negative Δ17O values (dashed arrow). The maximum 2 s.d. error bars for δ18O and Δ17O are plotted

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