Preservation and exhumation history of the Harizha-Halongxiuma mining area in the East Kunlun Range, Northeastern Tibetan Plateau, China

Yan, Feng; Yuan, Wanming; Tian, Yuntao; Feng, Xing; Hao, Nana; Zhang, Liting; Li, Yahao; Liu, Qingsong; Wang, Xiaolong; Shi, Zheming; Zhu, Xiwen; Wang, Ke; Zhang, Aikui

doi:10.1016/j.oregeorev.2016.12.029

Cited by 25 publications

(7 citation statements)

References 89 publications

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“…Before optical microscopy observations, etching was conducted using the NaOH/KOH (= 1:1) eutectic etchant for approximately 25 h at 210°C (Yuan et al, 2009). Thereafter, the neutron uence of the zircon samples was monitored using CN 2 uranium dosimeter glasses (Yuan et al, 2009;Feng et al, 2017;Tang et al, 2018).…”

Section: Methods and Approachmentioning

confidence: 99%

Tracking Multiple Episodes of Carlin-Type Gold Mineralization Using Zircon Fission-Track Thermochronology

Shan,

Pi,

Luo

et al. 2023

Preprint

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The mineralization ages of Carlin-type gold deposits in the Golden Triangle area of Southwest (SW) China have not been adequately defined. We applied zircon fission-track (ZFT) analysis to determine the mineralization ages. The age groups were divided into three periods by ZFT dating and a decomposition method: 230–200, 180–150, and 130 Ma, corresponding to the three magmatic–mineralization episodes in SW China. ZFT analysis was employed to effectively track the multiepisode mineralization history of the Carlin-type gold deposits. Based on the results from this study and existing studies, the Carlin-type gold deposits were probably formed predominantly during 230–200 Ma and were overprintedby the Yanshanian mineralization episodes.

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Section: Methods and Approachmentioning

confidence: 99%

Tracking Multiple Episodes of Carlin-Type Gold Mineralization Using Zircon Fission-Track Thermochronology

Shan,

Pi,

Luo

et al. 2023

Preprint

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“…3) all mean that the samples underwent a complex thermal history, rather than the experimental results being caused by differences in chemical fractions between single apatite grains. If the East Longshou Mountain achieved uplift cooling as a single block and a moderate cooling rate is assumed, i.e., no large-scale geothermal advection, we can expect a general relationship between AFT ages and elevations (Feng et al, 2017). However, the correlation between the AFT ages and the current samples' elevations (Fig.…”

Section: Data Interpretationmentioning

confidence: 96%

Exhumation and Preservation of the Jinchuan Ni‐Cu‐PGE Deposit under the East Longshou Mountain Thermal Evolution, Revealed by Apatite Fission Track Thermochronology

LEI

Jiao

et al. 2023

Acta Geologica Sinica (Eng)

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Uplift and exhumation are important factors affecting the preservation of deposits. The anatomy of uplift‐cooling evolution and exhumation in the East Longshou Mountain is of significant research value in understanding changes in the Jinchuan Ni‐Cu‐PGE deposit since its formation. This study uses apatite fission track (AFT) thermochronology to reconstruct the thermal history of the East Longshou Mountain, including the Jinchuan mine, revealing the uplift and exhumation history of the East Longshou Mountain and elucidating the preservation status of the Jinchuan deposit. The AFT ages in the East Longshou Mountain are distributed from 62.3 ± 3.0 Ma to 214.7 ± 14 Ma, with significant differences in ages in distinct areas, the central and pooled ages being consistent within the margin of error. Inverse thermal history models reveal two rapid cooling events associated with exhumation from the Early Jurassic to the Early Cretaceous (200–100 Ma) and since the Miocene (15–0 Ma), the former attributable to the far‐afield response to the closure of the Paleo‐Tethys Ocean and plate assembly at the southern margin of Eurasia, the latter associated with the initial India‐Eurasia plate collision. A slow cooling event from the Early Cretaceous to the Miocene (100–15 Ma) is thought to be related to the arid environment in northwest China since the Cretaceous. These cooling events have diverse responses and cooling rates in different blocks of the East Longshou Mountain: the southwest and centre of which are mainly cooled over 200–120 Ma and 120–0 Ma, with cooling rates of ~0.25 and ~0.33 °C/Ma (~1.25 and ~0.33 °C/Ma in the centre); the Jinchuan mine primarily cooled over 160–100 Ma, 100–15 Ma and 15–0 Ma, with cooling rates of ~1.33, ~0.25 and ~2.00 °C/Ma. These differentiated coolings imply that the uplift of the East Longshou Mountain before the Miocene (~15 Ma) was integral. Strong uplift then occurred in the vicinity of the mining area, which is a critical period for the uplift of the Jinchuan deposit to the surface, meaning that the Jinchuan deposit was exposed no earlier than the Miocene (~15 Ma). Based on mineralization depth information obtained by previous researchers, in conjunction with the calculation and simulation results of this study, it can be seen that the bulk of the Jinchuan intrusion may still be preserved at depth.

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“…At present, the porphyry deposits are mainly concentrated in the western part of the belt, with the Harizha deposit being a rare exception in the eastern part of the belt. At Harizha (Dulan County, Qinghai Province), the main tectonic-magmatic activities occurred mainly in the Caledonian-Yanshanian (Yang et al, 2015;Feng et al, 2017). The deposit is 7.8 km long, 7.1 km wide, 4,200 m in elevation (max 4,767 m) (Zhong, 2018;Zhang et al, 2019).…”

Section: Geological Background 21 Geologic Settingmentioning

confidence: 99%

“…Previous studies have shown that tectonic evolution of the East Kunlun Orogen mainly involved four stages: 1) ocean (Liu et al, 2013;Zhang et al, 2016). The Late Paleozoic-Early Mesozoic was the Paleo-Tethys orogenic period and was the main granite emplacement period in the East Kunlun (Xia et al, 2014;Feng et al, 2017;Xu et al, 2021). Some workers proposed that the Late Carboniferous-Late Permian (309-260 Ma) was the oceanridge formation and expansion stage.…”

Section: Tectonic Settingmentioning

confidence: 99%

Geochronology and geochemistry of Late Triassic granitoids in Harizha Cu polymetallic deposit (East Kunlun Orogen) and their metallogenic constraints

et al. 2022

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The large Harizha copper (Cu) polymetallic deposit is located in the eastern section of East Kunlun Orogen. The ore-related lithologies include mainly the granodiorite, monzogranite, and their porphyries. Zircon U-Pb dating of the ore-bearing granodiorite porphyry and granite porphyry yielded Late Triassic age of 217 Ma. The rocks are characterized by being rich in SiO2 (68.44–78.13 wt%) and high alkali (4.03–8.33 wt%) and peraluminous (A/CNK = 1.02–1.68). In general, the granite samples are peraluminous and high-K calc-alkaline. The rocks are significantly enriched in light rare earth elements (LREE), large ion lithophile elements (e.g., K, Rb, Ba) and other incompatible elements (e.g., U, Th), but are depleted in heavy rare earth elements (HREEs), with weakly negative Eu and Ce anomalies, resembling I-S transitional granite. The zircons have εHf (t) = -8 to -4, and the corresponding zircon two-stage Hf model age (TDM2) from 1.5 to 1.8 Ga. We speculated that the ore-forming materials in the mining area were mainly from partial remelting of crustal materials, and that the tectonic regime was post-collisional extension.

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Preservation and exhumation history of the Harizha-Halongxiuma mining area in the East Kunlun Range, Northeastern Tibetan Plateau, China

Cited by 25 publications

References 89 publications

Tracking Multiple Episodes of Carlin-Type Gold Mineralization Using Zircon Fission-Track Thermochronology

Tracking Multiple Episodes of Carlin-Type Gold Mineralization Using Zircon Fission-Track Thermochronology

Exhumation and Preservation of the Jinchuan Ni‐Cu‐PGE Deposit under the East Longshou Mountain Thermal Evolution, Revealed by Apatite Fission Track Thermochronology

Geochronology and geochemistry of Late Triassic granitoids in Harizha Cu polymetallic deposit (East Kunlun Orogen) and their metallogenic constraints

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