| 山东金伯利岩的壳幔混染、部分熔融、Re—Os同位素年龄及冰盖冰川搬运、人造金刚石干扰等领域研究最新进展 |
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| 引用本文： | 王照波,王庆军,朱成河,丁志豪.山东金伯利岩的壳幔混染、部分熔融、Re—Os同位素年龄及冰盖冰川搬运、人造金刚石干扰等领域研究最新进展[J].山东国土资源,2023,39(4). |
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| 作者姓名： | 王照波 王庆军 朱成河 丁志豪 |
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| 作者单位： | 自然资源部金矿成矿过程与资源利用重点实验室，山东省金属矿产成矿地质过程与资源利用重点实验室；平邑县明光寺林场；临沂沂蒙山世界地质公园管理局;自然资源部金矿成矿过程与资源利用重点实验室，山东省金属矿产成矿地质过程与资源利用重点实验室；山东省第七地质矿产勘查院;山东指南针矿产勘查有限公司 |
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| 摘 要： | 根据山东蒙阴各类金伯利岩及其相关幔源捕掳体的化学成分，研究了金伯利岩壳源混染程度与岩石类型之间的关系。发现橄榄岩—碎裂状橄榄岩—粗斑金伯利岩—细粒金伯利岩之间，其壳源混染程度逐渐增高。粗斑金伯利岩的壳源混染程度接近碎裂状橄榄岩，表明粗斑金伯利岩是碎裂状橄榄岩的进一步碎裂的产物；金伯利岩经历了地幔橄榄岩的部分熔融形成碎裂状橄榄岩、斑状金伯利岩。根据金伯利岩中大理岩包体、黄铁矿的ReOs同位素研究，获得了蒙阴金伯利岩的侵位时间分别为227.97Ma和245.80Ma，属于三叠纪，与苏鲁大别造山带的形成时间一致，由此分析蒙阴金伯利岩的侵位与扬子板块和华北板块的碰撞有关，也似乎暗示了华北克拉通破坏的初始阶段。华北冰盖冰川对于金刚石的搬运方式、搬运路径与流水搬运之间存在巨大差异，需要对金刚石的供源与分散进行重新认识。地表大量分布的人造金刚石对金刚石的找矿工作已经造成干扰与误导，需要引起重视。
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| 关 键 词： | 金伯利岩 壳源混染 部分熔融 ReOs同位素 冰川搬运 人造金刚石 |
Recent Progress in Research on Crust Mantle Contamination, Partial Melting, Re Os Isotopic Age Ice Sheet Glacier Transport, Artificial Diamond Interference and Other Fields of Kimberlite in Shandong Province |
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| WANG Zhaobo,WANG Qingjun,ZHU Chenghe,DING Zhihao.Recent Progress in Research on Crust Mantle Contamination, Partial Melting, Re Os Isotopic Age Ice Sheet Glacier Transport, Artificial Diamond Interference and Other Fields of Kimberlite in Shandong Province[J].Land and Resources in SHANDONG Province,2023,39(4). |
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| Authors: | WANG Zhaobo WANG Qingjun ZHU Chenghe DING Zhihao |
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| Abstract: | Based on chemical compositions of various types of kimberlites and their related mantlederived traps in Mengyin county in Shandong province, the relationship between the mixing degree of kimberlites and rock types has been studied. It is found that the degree of shellsource mixing increased gradually from peridotite, cataclastic peridotite, coarseporphyry kimberlite to finegrained kimberlite. The degree of shellderived mixing about coarse porphyry kimberlite is close to cataclysmic peridotite, which is the product of further cataclysmic peridotite fragmentation. The kimberlite underwent partial melting of mantle peridotite to form cataclastic peridotite and porphyritic kimberlite. According to the ReOs isotopic study about the marble and pyrite xenoliths in the kimberlite, the emplacement time of Mengyin kimberlite is 227.97Ma and 245.80Ma respectively, which belong to the Triassic and are consistent with the formation time of SuluDabei orogenic belt. Therefore, it is regarded that the emplacement of Mengyin kimberlite is related to the collision between the Yangtze Plate and the North China Plate. It also seems to hint at the initial stages of the destruction of the North China Craton. There are great differences between the transport mode, transport path and water transport of diamond in North China ice sheet glaciers. It is necessary to reunderstand the source and dispersion of diamond. The large amount of synthetic diamond distributed on the surface has misled the diamond prospecting work and should be paid more attention. |
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| Keywords: | Kimberlite shell source mixed dyeing partial melting ReOs isotope glacier transport synthetic diamond |
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