Provenance Analysis of Triassic Baikouquan Formation in the Area around Mahu Depression, Junggar Basin

Key words: 
• provenance analysis /
• heavy mineral /
• cluster analysis /
• Triassic Baikouquan Formation /
• Mahu depression /
• Junggar Basin

Abstract: By study of heavy mineral, paleocurrent direction, pebble content and the glutenite percentage, this paper discussed the provenance and the content of material source rock of Baikouquan Formation in the area around Mahu depression. By the method of Q-type clustering analysis, Paleocurrent direction analysis combine ZTR map, it shows that there are three distinct sediment sources of Baikouquan Formation in the study area:the northern Xiazijie provenance, the western Huangyangquan provenance and the eastern Xiayan provenance. The hauling distance of western provenance and eastern provenance are longer than northern provenance's. By analysis of pebble content and heavy mineral combination, it shows that there exist difference of material source rock content between northern provenance and western provenance. The content of northern provenance are primarily tuff, intermediate-acid volcanic rock, while the content of western provenance are tuff, sedimentary rock and granite. As the western provenance has higher content granite, so do the higher content hard particle, and which makes the reservoir has stronger ability to resist the compaction. The directions of different sediment sources identified are in accordance with the main building directions of fans delta. Using comprehensive analysis with several methods to identify source area in the study area is quite effective.