Noble gases in pyrites from the Guocheng-Liaoshang gold belt in the Jiaodong province: Evidence for a mantle source of gold
Noble gases in pyrites from the Guocheng-Liaoshang gold belt in the Jiaodong province: Evidence for a mantle source of gold
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胶东郭城-辽商金矿带黄铁矿中的稀有气体：地幔金源的证据
DOI：
10.1016/j.chemgeo.2017.09.027
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发表时间：
2017-09
期刊：
影响因子：
3.9
通讯作者：
Fu Lebing
中科院分区：
文献类型：
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作者：
Tan Jun;Wei Junhao;He Huaiyu;Su Fei;Li Yanjun;Fu Lebing
胶东金矿区最近的矿产勘探计划（2009-2014年）确定了新的郭城-辽上金矿带，其储量为92吨Au。在主要矿床中，矿石以块状硫化物的形式存在于断层中，占25 - 95体积%。本文报道了5个矿床20个黄铁矿样品的He-Ar同位素组成，3 He/4 He为0.41 ~ 2.39Ra，40 Ar/36 Ar为367 ~ 2112，40 Ar/4 He为0.40 ~ 3.78。这些数据需要四个气源;一个主要的幔源成分加上次级地壳放射成因，大气和盆地卤水成分。地幔端元为3 He/4 He（3.32- 4.00Ra）。这低于大多数估计的次大陆岩石圈地幔（SCLM：6-7 Ra），这意味着它可能是由俯冲相关的流体交代再受精。这与山东玄武岩中SCLM捕虏体的He-Ar同位素特征一致。在成矿区内，矿山Au储量与成矿流体中幔源He的比例呈正相关。这意味着，流体，并推断金，主要来自岩石圈伸展期间的地幔熔体。鉴于胶东半岛金矿床与幔源岩浆的显著共生关系，我们设想我们的成因模式可以在一定程度上应用于某些找矿靶区的潜力评价。
The recent mineral exploration programme (2009–2014) in the Jiaodong gold province identified the new Guocheng-Liaoshang gold metallogenic belt which contains reserves of 92 tonnes (t) Au. In the main deposits the ore is fault-hosted in massive sulfides that make up to 25 to 95 vol%. The He-Ar isotope compositions of ore-forming fluids from 20 pyrite samples from the five main deposits are reported here.3He/4He range between 0.41 and 2.39 Ra,40Ar/36Ar are 367 to 2112 and40Ar⁎/4He are 0.40–3.78. The data require four gas sources; a dominant mantle-derived component plus sub-ordinate crustal radiogenic, meteoric and basin brine components. The mantle end-member has3He/4He (3.32–4.00 Ra). This is lower than most estimates for sub-continental lithospheric mantle (SCLM: 6–7 Ra), implying that it was probably refertilized by subduction-related fluid metasomatism. This is consistent with He-Ar isotopes reported for SCLM xenoliths from basalts in the Shandong Province. Within the mineralisation province, the mine Au reserve is positively correlated with the proportion of mantle-derived He in the ore-forming fluids. This implies that the fluids, and by inference the gold, was largely derived from mantle melts during lithospheric extension. Given the conspicuous association of gold ore deposits with mantle-derived magma in the Jiaodong Peninsula, we envisage that our genetic model can be applied, to some extent, to evaluate the potential of some mineral exploration targets.
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影响因子：
64.8
作者：
G. Turner;F. Stuart
通讯作者：
G. Turner;F. Stuart
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：
10.1086/378486
发表时间：
2003-11
期刊：
The Journal of Geology
影响因子：
--
作者：
Jian-wei Li;P. Vasconcelos;Jun Zhang;Mei‐Fu Zhou;Xiaojun Zhang;Feng-Hua Yang
通讯作者：
Jian-wei Li;P. Vasconcelos;Jun Zhang;Mei‐Fu Zhou;Xiaojun Zhang;Feng-Hua Yang
影响因子：
6.1
作者：
Guochun Zhao;M. Zhai
通讯作者：
Guochun Zhao;M. Zhai
胶东半岛幔源流体与金矿成矿的关系——来自D−O−C−S同位素系统学的证据
影响因子：
3.3
作者：
通讯作者：
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