According to the discussion on distribution of organic matter and chemical elements of the Lete Quaternary deposits in the Berikun Lake of Xinjiang

and on its relations with palaeoclimate

some ideas are given as follows. 1) Distribution of organic matter and chemical elements correlates well with the cycles of bio-stra tum cycles

and this means that the climatic pattern of alternating between moist-cold and dry-warm exists in inland arid ares in the middle latitudes

which has dominated the changes of geochemical envi ronment in the areas since the Late Plestocene. 2) In the closed Lake basin in arid region

changes of organic matter compositions and the chemi cal element combinations have been mainly controlled and influenced by the volume of effective precip itation(or moisture). Ratios of C/N

Sr/Ba and CaO/MgO reflect that the paleoclimate Variation in this region is periodic. 3) Distributions of most chemical elements and CaCO3 content indicates that the paleoclimatic changes have been fluctually in tending to become in this region since the Late Pleistocene.