Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology
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 f...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Nature Publishing Group
2017
|
| Online Access: | http://hdl.handle.net/20.500.11937/65700 |
| _version_ | 1848761184731267072 |
|---|---|
| author | Liu, X. Fan, H. Evans, Noreen Yang, K. Danisik, Martin McInnes, Brent Qin, K. Yu, X. |
| author_facet | Liu, X. Fan, H. Evans, Noreen Yang, K. Danisik, Martin McInnes, Brent Qin, K. Yu, X. |
| author_sort | Liu, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T10:27:38Z |
| format | Journal Article |
| id | curtin-20.500.11937-65700 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:27:38Z |
| publishDate | 2017 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-657002018-11-09T01:49:43Z Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology Liu, X. Fan, H. Evans, Noreen Yang, K. Danisik, Martin McInnes, Brent Qin, K. Yu, X. 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. 2017 Journal Article http://hdl.handle.net/20.500.11937/65700 10.1038/s41598-017-08103-w http://creativecommons.org/licenses/by/4.0/ Nature Publishing Group fulltext |
| spellingShingle | Liu, X. Fan, H. Evans, Noreen Yang, K. Danisik, Martin McInnes, Brent Qin, K. Yu, X. Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title | Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title_full | Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title_fullStr | Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title_full_unstemmed | Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title_short | Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology |
| title_sort | exhumation history of the sanshandao au deposit, jiaodong: constraints from structural analysis and (u-th)/he thermochronology |
| url | http://hdl.handle.net/20.500.11937/65700 |