和龙地块边界、演化阶段及成矿作用的讨论

A discussion about boundary, evolutionary stages and mineralization of Helon landmass

和龙地块北面、北西、南西分别与兴凯地块、夹皮沟地块、白山地块相邻,内部发育有块带结构体系;经历了中—晚太古代形成与拼贴、古元古代裂谷发育与闭合、中元古代—晚志留世初多岛弧盆体系、晚志留世初—中三叠世块带结构体系、晚三叠世至今环太平洋构造活动带五个构造演化阶段。和龙地块与兴凯地块接触带为汪清—小西南岔金及多金属成矿带;与夹皮沟地块接触带为夹皮沟成矿带;与白山地块接触带为一条有待开发的金及多金属成矿带。和龙地块内部,古洞河断裂带以南,块带结构体系中"块"的部分,主要有三类矿产:一是与太古界表壳岩有关的铁矿床发育,二是与辽吉裂谷中老岭群珍珠门组有关的锑、银、金等矿产,具有一定找矿潜力;三是与陆壳重熔型花岗岩有关的钼及多金属矿产,找矿潜力较大。古洞河断裂以北,块带结构体系中"带"的部分,主要形成一些与中生代侵入岩有关的钼、铜等多金属矿产。块带结构界线为古洞河韧性剪切带型金成矿带。

The north, north west, south west of Helon landmass is respectively adjacent to Xingkai landmass, Jiapigou landmass, Baishan landmass, it develops into a plot-belt structure system; It experienced five stages of tectonic evolution which are the Middle —late Archean Era formation and collage, the Paleo-Proterozoic Era rifting development and closed, the Mesoproterozoic Era- Middle Silurian Epoch island arc basin system, the early of Late silurian Epoch —Triassic Epoch plot-belt structure system and the Late Triassic Epoch — today circum-pacific tectonic active belt. There is the Wangqing-Xiaoxinancha gold and polymetallic metallogenic belt between Helon landmass and Xingkai landmass;the Jiapigou metallogenic belt between Helon landmass and Jiapigou landmass;a yet to be developed gold and polymetallic metallogenic belt between Helon landmass and Baishan landmass. There are mainly three types of mining in the south of the Gudonghe fault area, Which is the ＂plot＂ part of the plot-belt structure system in the Helon landmass： One is iron ore deposit related to the Archean Era watchcase rock; Second, antimony, silver, gold and other minerals related to the Laoling Group in the Liao-ji rift, having certain prospecting potential; Three, molybdenum polymetallic mineral related to the continental crustal remelting type granite, haing a good prospecting potentiality. In the north of the Gudonghe fault area, Which is the ＂belt ＂ part of the plot-belt structure system in the Helon landmass, mainly formed some molybdenum, copper and other metals related to Mesozoic intrusive rocks. The boundary of ＂plot＂ part and the ＂belt＂ part is the Gudonghe ductile shear zone type gold metallogenic belt.