CAJ | 학술논문

安徽庐枞盆地位于长江中下游成矿带内，定位于扬子板块、华北板块与大别造山带之间，为一中生代陆相火山岩断陷盆地。庐枞盆地内广泛发育中生代岩浆活动，包括龙门院、砖桥、双庙、浮山4个旋回的火山岩及同期次侵入的中酸性岩体。盆地中成矿作用类型丰富，矿种多样，与龙门院旋回有关的潜火山热液型铅锌矿床、与砖桥旋回有关的玢岩型铁矿床是盆地中重要的成矿作用系列，以往工作较为全面地对这两个成矿系列进行了研究。随着近几年找矿工作的突破，盆地中与正长岩类有关的铁氧化物-铜-铀矿床逐渐受到重视。本文以深部探测ZK01孔深部铀矿化、马口铁矿、黄梅尖岩体周边铀矿床为研究对象，初步探讨区域与正长岩类有关的铁氧化物-铜-铀矿化系列，为庐枞整装勘查区找矿工作提供新思路、新方向。
안휘려종분지위우장강중하유성광대내，정위우양자판괴、화북판괴여대별조산대지간，위일중생대륙상화산암단함분지。려종분지내엄범발육중생대암장활동，포괄룡문원、전교、쌍묘、부산4개선회적화산암급동기차침입적중산성암체。분지중성광작용류형봉부，광충다양，여룡문원선회유관적잠화산열액형연자광상、여전교선회유관적분암형철광상시분지중중요적성광작용계렬，이왕공작교위전면지대저량개성광계렬진행료연구。수착근궤년조광공작적돌파，분지중여정장암류유관적철양화물-동-유광상축점수도중시。본문이심부탐측ZK01공심부유광화、마구철광、황매첨암체주변유광상위연구대상，초보탐토구역여정장암류유관적철양화물-동-유광화계렬，위려종정장감사구조광공작제공신사로、신방향。
Luzong basin located in the Middle-Lower Yangtze River metallogenic belt is a Mesozoic terrestrial volcanic basin.Tectonically,Luzong basin is located among the Yangtze Plate,North China Plate and Dabie Orogeny.The volcanic rocks and synchronous intrusions occur widely in the basin,including four groups of volcanic rocks,such as Longmengyuan Group,Zhuanqiao Group,Shuangmiao Group and Fushan Group.The mineralization in the basin is of various series,including the lead-zinc deposits related with Longmengyuan Group and the porphyrite-type iron deposits related with Zhuanqiao Group.Recently, the researches begin to focus on the iron oxide-copper-uranium mineralization with syenite.Based on the study of Makou iron deposit,the uranium mineralization in the ZK01 drilling and the uranium deposits around Huangmeijian intrusion,we systematically conclude the geological characteristics and the genesis of the iron oxide-copper-uranium mineralization with syenite in Luzong region.The iron dioxide-copper-uranium mineralization occurred in the inner syenite intrusions and the contact zone,which has genetic relationship with the Cretaceous magmatism.According to the tectonic background and geochemical characteristics,the iron dioxide-copper-uranium mineralization in Luzong basin can be classified into two types,including iron dioxide-copper-uranium mineralization related with the alkaline syenite and iron dioxide-copper mineralization related with A-type granite.The iron dioxide-copper-uranium mineralization related with the alkaline syenite locates in the inner Luzong basin, whereas iron dioxide-copper mineralization related with A-type granite locates at the southeast boundary of Luzong basin.The age of iron dioxide-copper-uranium mineralization ranges from 130Ma to 110Ma when the region is in extensional setting.The mineralization similar with the IOCG type deposits probably represents the latest stage of mineralization in Luzong region and middle-lower reachers of Yangtze River metallogenic belt.