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dc.contributor.authorLiu, X.
dc.contributor.authorFan, H.
dc.contributor.authorEvans, Noreen
dc.contributor.authorYang, K.
dc.contributor.authorDanisik, Martin
dc.contributor.authorMcInnes, Brent
dc.contributor.authorQin, K.
dc.contributor.authorYu, X.
dc.identifier.citationLiu, X. and Fan, H. and Evans, N. and Yang, K. and Danisik, M. and McInnes, B. and Qin, K. et al. 2017. Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology. Scientific Reports. 7: 7787.

The Sanshandao gold deposit contains an estimated Au resource of > 1500 tons, however little is known about the history of exhumation, and the magnitude of displacement on the ore-hosting fault. Structural measurement revealed two phases of normal and one phase of sinistral movement on the fault. Despite of intra-sample dispersions, (U-Th)/He ages from two sub-vertical profiles show decreasing trends from the surface down to -3560 m (zircon: 123 Ma to 55 Ma; apatite 103 Ma to 0.3 Ma). Over-dispersion of AHe ages likely reflects the presence of undetected inclusions. According to the age-depth pattern, we infer that the deposit underwent an early phase of rapid cooling in the late Early Cretaceous, which was followed by a short period of thermal stagnation and a revived rapid cooling between 75 Ma and 55 Ma in response to a combined effects of late normal movement and erosion. Since the Eocene, the deposit has experienced a slow monotonic cooling. Exhumation magnitude estimates suggest that the deposit have been denudated > 5.1 km. The two phases of normal displacement along the fault occurred in the late Early Cretaceous and Late Cretaceous to Paleocene, leading to a total offset magnitude of 0.5–2.3 km.

dc.publisherNature Publishing Group
dc.titleExhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology
dc.typeJournal Article
dcterms.source.titleScientific Reports
curtin.departmentJohn de Laeter Centre
curtin.accessStatusOpen access

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