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| 1 | 湘东北幕阜山−梅仙深部电性结构及其对稀有金属成矿的控制作用显示文摘为揭示湘东北幕阜山−梅仙两大岩体之间的深部地质结构,深化岩浆构造的控矿作用认识,实现地球物理深地探测技术在伟晶岩型稀有金属矿床找矿中的应用,对经过湘东北幕阜山−梅仙矿集区的电磁测深剖面进行了处理和解释,结合地质信息推演了深部地质构造格局。频率域大地电磁探测数据阻抗张量和相位张量分解分析表明湘东北仁里矿集区在高频区(大于1 Hz)主要呈现二维构造特征;利用Swift分解和相位张量分解结果对剖面所有测点数据进行电性主轴分析,判断出剖面主要构造走向总体上呈北偏西48°~50°;针对TE、TM两个模式利用Occam反演方法分别进行了单独和联合反演,并对幕阜山−梅仙地区深部电性分布进行了地质解释。本文综合研究结果表明,幕阜山−梅仙两大岩体深部存在走向北西−南东、倾向东北的岩浆构造,此构造控制的岩脉穿插到冷家溪群中,形成一系列走向北西向、倾向南西的含稀有金属伟晶岩群。 | 曹创华 程云涛 邹光均 黄建中 刘俊峰 文春华 孟德保 柳建新 楼法生 邓居智 | 2022 | 中国有色金属学报2022，32，4： | 3 |
| 2 | 胶东北部大柳行金矿田成矿构造的广域电磁法勘查及对深部找矿的指示显示文摘大柳行金矿田位于胶东金矿集区三大成矿带之一的栖霞-蓬莱金矿带内,成矿构造研究一直是找矿工作的基础和前提。通过实施8条广域电磁测深剖面,进行一维反演和水平方向导数的求取,推断解释了大柳行金矿田的深部地质结构和断裂空间分布,并以此为基础分析了断裂控矿规律和找矿方向。在视电阻率剖面上,浅部出现大面积的低阻异常区,深部高阻异常较明显,水平方向一阶导数图显示NE—NNE向的带状视电阻率异常出现错断或扭折现象。推断解译表明,研究区浅表部主要为晚白垩世花岗岩,深部主要为早前寒武纪变质基底岩系,区内断裂构造非常发育。推断解译的虎路线断裂倾角较陡,断裂南段和北段延深约在-2000 m标高以上,中段延深至少可达-3000 m标高;NNE走向的4条主要控矿断裂倾角均较陡,并在标高-600 m左右和-1600 m左右均有明显变缓表现,断裂延深均超过-2000 m标高,最深处超过-3000 m;推断了5条NW向成矿后断裂,其中2条是新发现的断裂。综合分析认为,区内控矿断裂为虎路线断裂的次级断裂,而且前者可能是金成矿的导矿断裂;研究区南部4条主要控矿断裂2000~3000 m深度范围、虎路线断裂深部倾角波状变化部位和主要控矿断裂旁侧与其平行、等间距分布的小规模断裂、裂隙是今后找矿的重点方向。 | 黄鑫 王勇军 宋倩 崔凯 徐昌 邵玉宝 李泗龙 朱裕振 | 2022 | 地质通报2022，41，6： | 2 |
| 3 | Geology and mineralization of the Dayin’gezhuang supergiant gold deposit(180 t)in the Jiaodong Peninsula,China:A review显示文摘The Dayin’gezhuang gold deposit is located in the central part of the Zhaoping Fault metallogenic belt in the Jiaodong gold province-the world’s third-largest gold metallogenic area.It is a typical successful case of prospecting at a depth of 500-2000 m in recent years,with cumulative proven gold resources exceeding 180 t.The main orebodies(No.1 and No.2 orebody)generally have a pitch direction of NNE and a plunge direction of NEE.As the ore-controlling fault,the Zhaoping Fault is a shovel-shaped stepped fault,with its dip angle presenting stepped high-to-low transitions at the elevation of -2000-0 m.The gold mineralization enrichment area is mainly distributed in the step parts where the fault plane changes from steeply to gently,forming a stepped metallogenic pattern from shallow to deep.It can be concluded from previous studies that the gold mineralization of the Dayin’gezhuang gold deposit occurred at about 120 Ma.The ore-forming fluids were H_(2)O-CO_(2)-NaCl-type hydrothermal solutions with a medium-low temperature and medium-low salinity.The H-O isotopic characteristics indicate that the fluids in the early ore-forming stage were possibly magmatic water or mantle water and that meteoric water gradually entered the ore-forming fluids in the late ore-forming stage.The S and Pb isotopes indicate that the ore-forming materials mainly originate from the lower crust and contain a small quantity of mantle-derived components.The comprehensive analysis shows that the Dayin’gezhuang gold deposit was formed by thermal uplifting-extensional tectonism.The strong crust-mantle interactions,large-scale magmatism,and the material exchange arising from the transformation from adakitic granites to arc granites and from the ancient lower crust to the juvenile lower crust during the Early Cretaceous provided abundant fluids and material sources for mineralization.Moreover,the detachment faults formed by the rapid magmatic uplift and the extensional tectonism created favorable temperature and pressure conditions and space for fluid accumulation and gold precipitation and mineralization. | Xiang-dong Liu Zheng-jiang Ding Ming-chun Song Ming-ling Zhou Shao-hui Xu Zhen-liangYang Tian-ci Xie Tao Cui Ying-xin Song Xue-kan Gao Rui-xiang Li Liang-liang Zhang Qi-bin Zhang Shan-shan Wang Bin Wang | 2022 | China Geology2022，5，4： | 1 |
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