%0 Journal Article
%T MAJOR TYPES OF COPPER DEPOSITS AND DIRECTION IN COPPER PROSPECTING IN CHINA<br>我国铜矿床主要类型及找矿方向初探
%A SUN Hai-tian
%A HAN Fa
%A GE Chao-hua
%A <br>孙海田
%A 韩发
%A 葛朝华
%J 地球学报
%D 1992
%I 
%X The Cu-deposits to be known very well in China are mainly characti- rized by large total mineral reserves, low grade, a large numbers of mineral deposits of which a few can be economically mined. The low grade Cu-deposits of porphyry and Cu-Ni sulfide types are near 50% of the total reserves of Cu-deposits, but now, very little of them can be exploited economically. The Cu-deposits of comparative high grade or abundant associated elements, for in stance, volcanogenetic, marine sedimentary, skarn and poly-genetic Cu-deposits are the essencial objectives to be mined. Seeking the Cu-deposits which can be economically mined is one of the most important tasks in the reconnaissance survey and exploration works at present time when a lot of Cu material is imported every year because the supply of Cu-ore production has fallen short of demand for many years. The distribution of the Cu-deposits concentrates on nine districts, within which the occurrence of Cu-deposits is controlled by the special geological environment and time, so those concentrating areas are the most important targets to look further for some types of Cu-deposits, for instance: volcanogenetic Cu-deposits in Archaean and Early and Late Proterozoic eugeosyncline areas, marine sedimentary Cu-deposits in Middle Proterozoic miogeosyncline areas within Huabei and Huanan platforms or their edges, volcanogenetic Cu-deposits in Early Proterozoic and Mesozoic eugeosyncline orogenic zones; skarn or poly-genetic Cu-deposits in Mesozoic and Cenozoic tectonic magmatic active belts.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=1DF69A47DE80569EC8F859DF61571180&aid=C6A21C2546290309046E1869AB11008D&yid=F53A2717BDB04D52&vid=FC0714F8D2EB605D&iid=CA4FD0336C81A37A&sid=C5154311167311FE&eid=2001E0D53B7B80EC&journal_id=1006-3021&journal_name=地球学报&referenced_num=0&reference_num=0