Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology

Abstract 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 th...

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Autores principales:	Xuan Liu, Hong-Rui Fan, Noreen J. Evans, Kui-Feng Yang, Martin Danišík, Brent I. A. McInnes, Ke-Zhang Qin, Xue-Feng Yu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7e1808d83f5746b1ba5f31093d17cf06
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spelling	oai:doaj.org-article:7e1808d83f5746b1ba5f31093d17cf062021-12-02T16:06:09ZExhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology10.1038/s41598-017-08103-w2045-2322https://doaj.org/article/7e1808d83f5746b1ba5f31093d17cf062017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08103-whttps://doaj.org/toc/2045-2322Abstract 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.Xuan LiuHong-Rui FanNoreen J. EvansKui-Feng YangMartin DanišíkBrent I. A. McInnesKe-Zhang QinXue-Feng YuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-12 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xuan Liu Hong-Rui Fan Noreen J. Evans Kui-Feng Yang Martin Danišík Brent I. A. McInnes Ke-Zhang Qin Xue-Feng Yu Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology
description	Abstract 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.
format	article
author	Xuan Liu Hong-Rui Fan Noreen J. Evans Kui-Feng Yang Martin Danišík Brent I. A. McInnes Ke-Zhang Qin Xue-Feng Yu
author_facet	Xuan Liu Hong-Rui Fan Noreen J. Evans Kui-Feng Yang Martin Danišík Brent I. A. McInnes Ke-Zhang Qin Xue-Feng Yu
author_sort	Xuan Liu
title	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_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_sort	exhumation history of the sanshandao au deposit, jiaodong: constraints from structural analysis and (u-th)/he thermochronology
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7e1808d83f5746b1ba5f31093d17cf06
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Exhumation history of the Sanshandao Au deposit, Jiaodong: constraints from structural analysis and (U-Th)/He thermochronology

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