Small Tertiary half-graben basin, located within the Biyang depression and controlled by the N-W and N-E striking Tanghe-Liyuan and Liyuan-Biyang faults, respectively. In the Anpeng district in its center, a suite of thick dolomitic units interbedded with trona layers totalling more than 1500 meters was deposited by a perennial alkalescence saline depositional system (Hetaoyuan Formation).
References
- Shangru Sun (2004): Analysis of High-resolution Sequence Stratigraphy of Lake-dolomite Formation in Biyang Depression. Northwestern Geology [Xibei Dizhi] 37(2), 30-35 (in Chinese).
- Guangqing Yao, Fengde Zhou, Carr, T.R., and Shangru Sun (2007): Reservoir Characterization of Lacustrine Argillaceous Dolomite with Trona Interbeds. Presented at the AAPG Annual Convention and Exhibition, April 1-4, 2007.
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