Sedimentary environment of Upper Permian in Zhaheba Depression of Northern Xinjiang

Zhaheba Depression is located between Altay Mountains and Junggar Basin, belonging to the Center Asian Orogeny belts. Zhaheba Depression has undergone the opening and closing phrases of the Junggar oceanic basin, which is rich in coal and metallic mineral resources, and has certain prospects for oil and gas exploration. Volcanic rocks and coal-bearing strata were well developed in this area, and the surface weathering and erosion were quite serious, which restricted the study of the stratigraphic characteristics and sedimentary environment. Through the test analysis of the trace element of the core samples of the well Xinfudi 1 in Zhaheba Depression, the authors thought that the Upper Permian in Zhaheba area was in a warm and humid freshwater sedimentary environment. And the sedimentary source of Zhangheba Depression mainly comes from the northeastern Altay Mountains and the southwestern Wulungu ancient land, and the depression belongs to the intermountain depression formed in the late Late Permian. This provides a basis for the subsequent study of the Late Permian tectonic-sedimentary evolution in the study area.