| 汪逸文,刘飚,吴堑虹,焦芬,赵彬彬,毛付龙.津巴布韦 Bikita超大型锂矿床成矿规律与找矿预测研究[J].矿产勘查,2026,17(3):522-534 |
| 津巴布韦 Bikita超大型锂矿床成矿规律与找矿预测研究 |
| Metallogenic regularities and exploration potential of the super-large Bikita Lithium Deposit, Zimbabwe |
| 投稿时间：2026-01-30 |
| DOI：10.20008/j.kckc.202603009 |
| 中文关键词: Bikita锂矿 成矿分带 构造控矿 找矿预测 津巴布韦 |
| 英文关键词: Bikita lithium deposit metallogenic zonation structural control ore prediction Zimbabwe |
| 基金项目:本文受湖南省面上基金(2021JJ40722)与中矿资源企业项目“MetallogenicregularityandprospectingpredictionofLi-BepolymetalinBikitadeposit,Zimbabwe”联合资助。 |
|
| 摘要点击次数: 2 |
| 全文下载次数: 3 |
| 中文摘要: |
| Bikita锂矿床位于津巴布韦克拉通东南部的 Masvingo绿岩带内，是世界著名的 LCT型锂矿床。本文通过系统野外地质调查、显微鉴定等研究方法主要得出以下认识:(1)Bikita伟晶岩具有典型的脉内分带特征，不同伟晶岩体在矿物组合和分带结构上存在明显差异，反映了伟晶岩熔体在侵位过程中经历了不同程度的分异演化；(2)矿区构造控矿模式可概括为陡倾劈理化带导矿、缓倾劈理化带容矿，其中陡倾劈理化带控制富挥发分伟晶岩熔体自深部向上运移，缓倾劈理化带为伟晶岩侵位及锂矿体赋存提供主要空间；(3)在区域尺度上，Bikita伟晶岩矿田可能由多个岩浆-成矿中心共同作用形成，整体呈现出“富矿伟晶岩—相对贫矿伟晶岩—富矿伟晶岩”的分带格局，北区 Damsite与南区 South-North分别代表两个相对独立的 LCT型伟晶岩成矿系统；(4)在综合成矿分带特征和构造控矿规律的基础上，本文优选出南区东侧和北区 Dam-site西南区段作为重点找矿靶区，为矿区进一步勘查与资源增储提供指导。 |
| 英文摘要: |
| The Bikita lithium deposit is located in the Masvingo Greenstone Belt at the southeastern margin ofthe Zimbabwe Craton. It is a world-renowned LCT-type (Li-Cs-Ta) pegmatite lithium deposit. This study is basedon systematic field investigations and petrographic observations. The main findings are as follows: (1) Bikita pegma-tites show typical internal (intra-vein) zonation. Individual pegmatite bodies differ markedly in mineral assemblagesand zonation architecture. These differences indicate that pegmatitic melts experienced different degrees of frac-tional differentiation during emplacement. (2) The structural control pattern of mineralization can be summarized as"steeply dipping cleavages guiding ore-forming melts" and "gently dipping cleavages hosting orebodies". Steeplydipping cleavage zones controlled the upward migration of volatile-rich pegmatitic melts from depth. Gently dippingcleavage zones provided the main space for pegmatite emplacement and lithium orebody occurrence. (3) At the re-gional scale, the Bikita pegmatite field may have been formed by the combined effects of multiple magma-metallogenic centers. The overall zonation pattern can be described as "ore-rich pegmatites-relatively barrenpegmatites-ore-rich pegmatites". The northern Damsite area and the southern South-North area represents two rela-tively independent LCT-type pegmatite metallogenic systems. (4) By integrating the regional zonation features withthe structural controls, two priority exploration targets are proposed. These targets are located on the eastern side ofthe southern area and in the southwestern sector of the northern Damsite area. They provide guidance for further ex-ploration and resource expansion in the Bikita district. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |