Geochronological framework of the Xiadian gold deposit in the Jiaodong province, China: Implications for the timing of gold mineralization
Geochronological framework of the Xiadian gold deposit in the Jiaodong province, China: Implications for the timing of gold mineralization
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中国胶东省夏甸金矿床的年代学格架：对金成矿时间的启示
DOI：
10.1016/j.oregeorev.2017.02.016
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发表时间：
2017-06
影响因子：
3.3
通讯作者：
Jiang Peng
中科院分区：
文献类型：
--
作者：
Ma Wei-Dong;Fan Hong-Rui;Liu Xuan;Pirajno Franco;Hu Fang-Fang;Yang Kui-Feng;Yang Yue-Heng;Xu Wen-Gang;Jiang Peng
夏店金矿床位于胶东金矿省招远—莱州带，是典型的焦家型金矿床，其特征是浸染状、网状矿石被热液蚀变围岩所包围。金矿的确切年龄和成因仍存在争议。在这里，我们提出了精确的原位独居石 U-Pb 定年法，以限制金矿化的年龄，并将其与已发表的相关地质事件的地质年代学工作相结合，以了解金矿床的成因。玲珑花岗岩代表了夏店最早的岩浆事件，并产生了锆石 LA-ICPMS U-Pb 年龄为 159.5 ± 0.9 Ma (2σ, MSWD = 0.63)。随后的地质事件由少量的石英-黄铁矿-辉钼矿脉记录下来，通过花岗伟晶岩中的辉钼矿铼-锇测年，将其定年为 124.8 ± 2.1 Ma (2σ, MSWD = 0.01)。这种矿脉的形成位置接近邻近的郭家岭花岗闪长岩（~130 Ma）的位点，因此可以被认为是岩浆后热液活动的产物。有人提出，含钼热液流体是金成矿的前奏，并参与了后期成矿流体的形成。金矿化发生在 120.0 ± 1.4 Ma (2σ, MSWD = 0.59)，通过 LA-ICPMS U-Pb 对石英-多金属硫化物脉热液独居石进行定年测定。在成矿之前和之后，大量的热液蚀变斑状闪长岩和新鲜石英闪长斑岩岩脉被侵位，产生的 U-Pb 年龄分别为 121.3 ± 1.4 Ma (2σ, MSWD = 0.28) 和 115.8 ± 1.9 Ma (2σ, MSWD = 0.71)。基于这些年代学资料，我们建立了一个全面的年代学框架，这表明夏甸矿床的成因可能与华北克拉通的克拉通破坏和岩石圈减薄有关。
The Xiadian gold deposit, located in the Zhaoyuan–Laizhou belt of the Jiaodong gold province, is a typical Jiaojia-type gold deposit, which is characterized by disseminated and stockwork ores enclosed by hydrothermally altered wall rocks. The exact age and the genesis of the gold deposit remain controversial. Here, we present precise in-situ monazite U-Pb dating to constrain the age of the gold mineralization, which we integrate with published geochronological work on the associated geological events to understand the genesis of the gold deposit. The Linglong granite represents the earliest magmatic event at Xiadian, and yielded a zircon LA–ICPMS U-Pb age of 159.5 ± 0.9 Ma (2σ, MSWD = 0.63). Subsequent geologic events were recorded by minor amounts of quartz–pyrite–molybdenite veins which are dated at 124.8 ± 2.1 Ma (2σ, MSWD = 0.01) by molybdenite Re–Os dating in a granitic pegmatite. The formation of such veins was close to the emplacement of adjacent Guojialing granodiorite (~130 Ma), and thus may be considered as a product of post–magmatic hydrothermal activity. It is proposed that the molybdenum–bearing hydrothermal fluids acted as a prelude to gold mineralization and participated in the formation of the latter ore fluids. Gold mineralization took place at 120.0 ± 1.4 Ma (2σ, MSWD = 0.59), determined by LA–ICPMS U–Pb dating on hydrothermal monazite from quartz–polymetallic sulfide veins. Prior to and post mineralization, voluminous hydrothermally altered porphyritic diorite and fresh quartz diorite porphyry dykes were emplaced, which yielded U–Pb ages of 121.3 ± 1.4 Ma (2σ, MSWD = 0.28) and 115.8 ± 1.9 Ma (2σ, MSWD = 0.71), respectively. Based on these geochronological data, we have established a comprehensive geochronologic framework, which suggests that the genesis of the Xiadian deposit might be related to the craton destruction and lithosphere thinning in the North China Craton.
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影响因子：
3.5
作者：
Peng Jiang;Kui-Feng Yang;H. Fan;Xuan Liu;Ya-Chun Cai;Yue-heng Yang
通讯作者：
Peng Jiang;Kui-Feng Yang;H. Fan;Xuan Liu;Ya-Chun Cai;Yue-heng Yang
影响因子：
5.8
作者：
L. Snee;J. Sutter;W. Kelly
通讯作者：
L. Snee;J. Sutter;W. Kelly
中国东部苏鲁超高压地体超镁铁质岩的成因
影响因子：
3.5
作者：
Zhipeng Xie;Keiko Hattori;Jian Wang
通讯作者：
Jian Wang
影响因子：
3.9
作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
通讯作者：
Jin-Hui Yang;Sun‐Lin Chung;S. Wilde;Fu-Yuan Wu;M. Chu;C. Lo;H. Fan
DOI：
10.1111/j.1755-6724.2004.tb00777.x
发表时间：
2004-12
期刊：
Acta Geologica Sinica ‐ English Edition
影响因子：
--
作者：
Liu Shen;Hu Rui-zhong;Z. Junhong;Feng Caixia
通讯作者：
Liu Shen;Hu Rui-zhong;Z. Junhong;Feng Caixia