Standardized mineral data of sediment core PG1746 from Lake Temje (Yakutia, Russia)

This data set is part of a larger data harmonization effort to make lake sediment core data machine readable and comparable. Here we standardized mineral data (Quartz and Calcite) of sediment core PG1746 from Lake Temje (Yakutia, Russia). Lake Temje (62°03′ N, 129°29′ E) is a thermokarst lake located 13 km east of Yakutsk on the Magane Terrace, west of the Lena River at ca. 208 m a.s.l. The lake is shallow, with a maximum depth of 75 cm and no permanent inflows and outflows. The 3.8 m lake sediment core PG1746 was recovered as part of a joint Russian-German expedition of the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI, Germany, Potsdam) in cooperation with the North Eastern Federal State University (NEFU, Russia, Yakutsk) to Yakutia in July 2004. Sampling was performed from two connected rubber boats in the central part of Lake Temje at 70 cm water depth with a rod-operated half-tube corer (Russian peat corer: 5 cm in diameter, 100 cm long sampler). Overlapping core sections yielded a 380-cm-long sediment-core sequence. The core sections were described and sampled at 5-cm intervals in the field. X-ray diffraction analysis (XRD) was conducted to check both the presence of carbonate and the mineralogical composition of carbonate, which solely consists of calcite (XRD peak at 3.027 Å). The XRD data were also used to check the relative amount of quartz (XRD peak at 3.34 Å). XRD measurements were undertaken on random powder mounts, using a Philips PW1820 goniometer at AWI Bremerhaven (40 kV, 40 mA, from 3 to 100 , step-rate 0.05 , Co kα radiation).