**4. Conclusions**

We measured nondestructively 11 major and traces elements in the Holocene sediment of core HDP-06 core from Lake Hovsgol, using SR μ-XRF mapping techniques. A visual inspection of the acquired XRF images revealed that the 11 elements were classified into the three assemblages–group 1: Ti, Fe, Cu, Zn, As, Rb, Sr, Zr, and Nb, composed of rockforming minerals; group 2: Br, recognized as a biophilic trace elements; and group 3: Mn, Fe, and As, sensitive to redox condition in the sediment.

Temporal variations in the first two groups, based on the age of core X106, are in phase with GCM-simulated PME in central Asia. This trend is remarkably different from the PC-2 score of core X106 indicating detritus input into the lake. The PC-2 score, together with atmospheric CO2 and the regional annual mean temperature, shows a gradual increase from early Holocene to the present day. These two-type variations suggest that the continental erosion/weathering in central Asia occurred on two different processes and time-scales.
