Qianxia Fm
Type Locality and Naming
The type section is located around Qianxia, argusitao Mt., 50 km south of Urümqi, Xinjiang. It was named by the Changji Team of Xinjiang Bureau of Geology in 1960.
Lithology and Thickness
Volcaniclastics and Siltstone. A suite of fairly deep-sea fine-grained clastics, tuff and siliceous rock formation, with flysch and turbidite features. In the Qianxia area, it is composed of dark-gray and gray-black lithic-crystal tuff, thin- to moderately thick-bedded siltstone, tuff siltstone, tuff siliceous rock and clayey siliceous rock, with no fossils found. Exposed thickness 6492 m. At Bayingou on the north slope of Habierga Mt. in Yilin, it is composed of gray-black tuffaceous fine-grained sandstone, silty mudstone, clayey siltstone and andesitic tuff. Westward to the south side of Heishantou in Jinghe County, it is formed by clayey-siliceous rock, mudstone, siltstone and radiolarian chert. Exposed thickness 3540 m.
Relationships and Distribution
Lower contact
Unconformable contact with the underlying Shadawang Fm at Bayingou. Bottom incomplete at type section.
Upper contact
Unknown: top incomplete at type section and not seen at Bayingou.
Regional extent
Distributed in the Qiergusitao Mt., about 50 km south of Urümqi, in a nearly E-W extension.
GeoJSON
Fossils
Age
Depositional setting
It is interpreted as deep-sea terrigenous or volcaniclastic turbidites.
Additional Information