河南大吴湾铜矿床地质特征

大吴湾铜矿床地处大别山北麓钼铜成矿带，产于新县千斤乡千斤弧形构造顶内侧，古元古苏家河群浒湾组地层，其东部为大昊湾花岗斑岩，富硅、富碱，为钙碱性系列。大吴湾铜矿床铜矿化范围较大，地表全为铜矿化，而铜矿体仅处在地质勘查过的银风洞一带，为盲矿体。初步评价已达到小型矿床规模。依据矿床特征，对其矿床成因进行了探讨，确定为斑岩型铜矿床，并对其成矿前景进行分析，认为其东西两端的铜矿化地段，是寻找盲矿体的重要靶区，有望找到中到大型铜矿。

Geological Characteristics of the Dawuwan Copper Deposit in Henan Province

Dawuwan copper deposit is located at molybdenum-copper metallogenic belt in the northern slope of Dabieshan, and situated at the inner flank of Qianjin arc structural summit in Qianjing town of Xin County, which belongs to Paleoproterozoic Xuwan formation of Sujiahe group. To its east is Dawuwan granite porphyry with high- silicon and alkali calc-alkaline series. Mineralized belt of Dawuwan copper deposit is relatively larger, and its sur- face deposit is consisted of copper mineralization. There is a blind orebody in the surveyed Yinfeng cave. Prelimi- nary mineral assessment results show that its reserves can reach small scale deposit. Base on the deposit character- istics, the origin is discussed as a porphyry type copper deposit, and the metallogenic prospect is analyzed. This paper suggest that west and east parts of copper orebody can be regarded as the important target regions, where find middle to large scales copper deposit.