【正文】 s major porphyry copper deposits (eg the Anhui Shaxi, Heilongjiang Duobaoshan, Shan, in uran bulak, Xinjiang and Tsuchiya, four Chuan Xifan Ping, Dexing, Yulong ) carried out a preliminary study that the causes of these porphyry copper deposit with the Adakites [32]. 3 direction of prospecting for porphyry copper deposits in the word With the rapid development of economic and social situation of scarce copper ore resources in the word is increasingly grim. Alleviate this grim situation, and to achieve one of the measures for sustainable development of the word39。 C 1100 176。 O 型埃達克巖主要由俯沖板片的部分熔融形成 ,C型埃達克巖主要由下地殼折沉作用形成。目前具體的找礦方向有 :(1) 在埃達克巖出露區(qū)尋找斑巖型銅礦床 :由于埃達克巖與斑巖型銅礦在時間、空間和成因上存在著密切的關(guān)系，因此 ,埃達克巖可作為找礦的標志使用。配套條件不好 ,難以形成相關(guān)礦床。 (2) 實驗研究表明 ,埃達克巖漿的形成需要很高的溫度 ( 850 ℃ 1100 ℃ ) 和壓力 ( 1. 2 4. 0Gpa) [30 ,38 ] 。 2 (2) 早期洋殼斜向俯沖后的部分熔融 :如 Adak島和 Komankkorsky 島的埃達克。島弧玄武巖經(jīng)過分離結(jié)晶作用等 ,形成典型的島弧玄武巖、安山巖、英安巖和流紋巖系列 。兩類埃達克巖都與斑巖銅礦的成 礦作用存在著密切的關(guān)系。世界上大多數(shù)超大型的斑巖銅礦與 O 型埃達克巖有關(guān) ,而 世界的斑巖銅礦則大多數(shù)與 C 型埃達克巖有關(guān)。 Defant 等 (1990) 年重新提出 ,某些島弧鈣堿性安山巖和英安巖為俯沖板片部分熔融形成的。 (3) 已經(jīng)消亡俯沖板片的部分熔融 : 如 AridHills、 Jaraquay 的埃達克巖。在埃達克巖漿形成過程中 ,由于角閃巖相轉(zhuǎn)化為榴輝巖相而釋放出大量的水 [2 ] 。 2. 2 埃達克巖與斑巖銅礦 (1) 主要進展 :Thieblemont 等 (1997) 統(tǒng)計了全球 43 個 Au、 Ag、 Cu 和 Mo 低溫?zé)嵋汉桶邘r型銅礦 ,發(fā)現(xiàn)其中 38 個與埃達克巖有關(guān) ,因此 ,他們得出結(jié)論 :在全球規(guī)模上 ,多數(shù)埃達克巖省也是重要的成礦省 。 Defant 等 (2020) 指出 :埃達克巖對于勘探金銅礦床的作用可以與金鉑利巖尋找金剛石礦床相提并論 [26 ] 。 (2) 埃達克巖是一種十分有利的成礦母巖 ,無論 O 型或是 C 型埃達克巖 ,均能形成大型 超大型的斑巖銅礦床和淺成低溫?zé)嵋盒?Au Ag 礦床 ,因此 ,世界上絕大多數(shù)的斑巖型銅礦均有埃達克巖有關(guān)。 C) [36 37] and pressure (1 2 4 0Gpa), [ Adakitic magma formation process, due to the amphibolite facies transformation of eclogite facies and the release of large amounts of water Higher temperature and pressure, in particular, is rich in water, very conducive to the magmatic (hydrothermal) the extraction of metal elements, and enrichment and mineralization under appropriate conditions . (3) under high temperature, high pressure, waterrich and high fo2 state, the S magma exist to S6 + form, S2 small, this situation easily lead sulfide in the magma is unsaturated. Oxidation state, the crystallization of saturated magma differentiation role of oreforming elements bee inpatible element enrichment in the magma, rich in Cu and Au, Ag magmatic hydrothermal final release。s Copper Industry is to strengthen the prospecting and exploration of large very large porphyry copper . Adakite and porphyry copper mineralization of the close relationship for the porphyry copper deposit in the word has opened up a new direction, starting from finding Adakites to search for porphyry copper. Specific prospecting direction: (1) find in the Adakite outcrop of porphyry copper deposits: the Adakite and porphyry copper there is a close relationship in time, space, and the causes of Therefore, Adakites can be used as a prospecting signs. Defant (2020): the Adakite the role of the exploration of goldcopper deposit with Gold, Platinum, Lee rocks to find diamond deposits parable . Therefore, through the open area in the Adakite work is expected to obtain new breakthroughs in the porphyry copper deposit in the shorter term. Adakites in the 9 word39。 mine scale, Adakites and nonAdakite save mineralization Adakite [9]. Oyarzun et al (2020) found through the study of the porphyry copper deposit in northern Chile, the Paleocene early Miocene calcalkaline acidic igneous rocks and smallerscale porphyry copper, while the Late Miocene Early Pleistocene large very large porphyry copper deposits and Adakites [10]. Bellon (2020) surveyed 16 porphyry copper deposits in the Philippines, found that 14 of them in ti