加强埃达克岩研究，开创中国Cu、Au等找矿工作的新局面

埃达克岩与浅成低温热液Au-Ag及斑岩型Cu、Cu-Au矿床有密切的关系，环太平洋地区多数大型和世界级的斑岩铜矿均与埃达克岩有关。埃达克岩有利于成矿的关键因素与埃达克岩形成时角闪石转变为石榴石的脱水作用有关，而水能萃取出在地幔和基性岩中富集的金属元素。因此，埃达克岩集中分布的地区有利于铜、金等矿化的聚集。中国铜矿资源严重不足，解决这个紧迫问题的出路在寻找斑岩铜矿。全球铜矿主要分布在环太平洋地区，中国与环太平洋类似的地区不是中国东部，而是古亚洲洋造山带、东北吉黑东部和西藏冈底斯。从国家目标出发，建议实施铜、金等找矿工作的战略转移，把浅成低温热液和斑岩型Au、Cu、Ag等矿床找矿的重点放在古生代的古亚洲洋造山带、晚古生代-中生代的吉黑东部和中-新生代的冈底斯地区。古亚洲洋造山带首选阿尔泰西南缘-东准噶尔、东天山和内蒙古中部3个地区。埃达克岩可以作为找矿标志来使用，因此，在找矿思路上也应当有一个变化，即：先找埃达克岩，再找矿。

Study on adakite broadened to challenge the Cu and Au exploration in China

Adakite is associated closely with the epithermal and porphyry Au, Cu and Ag deposits, and most of large porphyrycopper deposits in the Circum-Pacific Belt are related to adakite. The key factor to form the deposits in the adakite is the dehydration from amphibole to garnet during the formation of adakite, which exacts the metal elements enriched in the mantle and mafic rocks into the adakite. The localities of adakite are therefore usually related to the Cu and Au mineralization. China is a country short in copper resource. To find large and superlarge porphyry copper deposits are probably a sustainable way to solve the shortage. The majority of the world-scale copper deposits occur in the Circum-Pacific Belt, whereas similar deposits in China occur not in the eastern China, but in the Paleo-Asian Oceanic Belt, the eastern part of NE China and Gandise Mountain of Tibet. It is suggested here that the further exploration be aimed at the epithermal and porphyry Au, Cu and Ag deposits in the Paleozoic Paleo-Asian Oceanic orogenic belt, Late Paleozoic-Mesozoic the eastern part of NE China and Mesozoic-Cenozoic Gandise Mt. of Tibet, in particular in the southwestern margin of Altun-eastern Zungar, eastern Tianshan and middle Inner Mongolia areas of the Paleo-Asian Oecanic orogenic belt. Since adakite is like an indicator of these kinds of ore deposits, the exploration strategy should be processed to find adakite first, then the deposits.