發(fā)布時(shí)間：2018-05-17 18:29

  本文選題：含銅鎳巖漿起源 + 硫飽和機(jī)制�。� 參考：《巖石學(xué)報(bào)》2016年07期

【摘要】：新疆黃山-鏡兒泉一帶是天山東段重要巖漿銅鎳硫化物成礦帶,但對(duì)其中含銅鎳巖漿起源和硫飽和機(jī)制尚存較大爭(zhēng)議。黃山南巖體是近年來在該成礦帶中發(fā)現(xiàn)的另一個(gè)含礦性較好的重要巖體。巖體可分為超鎂鐵質(zhì)巖相和鎂鐵質(zhì)巖相,超鎂鐵質(zhì)巖相為主要含銅鎳礦巖相,而鎂鐵質(zhì)巖相并未發(fā)生明顯的礦化。超鎂鐵質(zhì)巖相巖石類型包括二輝橄欖巖、斜輝橄欖巖、橄欖二輝巖、二輝巖、角閃二輝巖及少量粗粒輝長(zhǎng)巖,其中二輝橄欖巖和二輝巖是主要含礦巖石類型。鎂鐵質(zhì)巖相由蘇長(zhǎng)巖、輝長(zhǎng)巖、角閃輝長(zhǎng)巖、閃長(zhǎng)巖及石英閃長(zhǎng)巖組成。黃山南巖體的(~(87)Sr/~(86)Sr)i(0.7036~0.7057)、ε_(tái)(Nd)(t)(-1.2~+7.4)、(~(206)Pb/~(204)Pb)i(17.152~18.088)、(~(207)Pb/~(204)Pb)i(15.385~15.571)和(~(208)Pb/~(204)Pb)i(37.127~38.252)變化范圍均較大,顯示了母巖漿遭受了較明顯的殼源物質(zhì)混染。巖漿源區(qū)在板片俯沖過程中殼源物質(zhì)加入明顯,而原始巖漿上升過程中殼源物質(zhì)的混染有限。Sr-Nd-Pb同位素組成指示黃山南含礦巖體的形成與塔里木大火成巖省并無直接聯(lián)系。雖然黃山南巖漿銅鎳硫化物礦石δ~(34)S值介于-1.54‰~2.03‰之間,落在幔源硫的范圍內(nèi),但是Se(×10~6)/S比值表明殼源硫的加入對(duì)成礦母巖漿硫飽和起到重要作用。
[Abstract]:The Huangshan-Jingerquan area of Xinjiang is an important Cu-Ni sulfide metallogenic belt in the eastern part of Tianshan Mountains, but the origin of the Cu-Ni bearing magma and the mechanism of sulfur saturation are still controversial. Huangshannan rock body is another important ore-bearing rock found in this metallogenic belt in recent years. The rock mass can be divided into ultramafic facies and mafic facies. Ultramafic lithofacies is the main copper-nickel bearing mineralogy facies, but there is no obvious mineralization in mafic rock facies. Ultramafic lithofacies rock types include lherzolite, clinopherzolite, peridotite, hornblende and a small amount of coarse-grained gabbro. The mafic facies are composed of sapphire, gabbro, hornblende, diorite and quartz diorite. In the southern Huangshan rock mass, the range of changes is large, that is, 0.7036 ~ 0.7057, -1.2-7.4, and 204Pbr / T ~ 204Pb / L ~ (17.152N) 18.0888.571) and 204Pbr / 204Pbi (37.127338.252), which shows that the magma has been contaminated by the crust material. In the plate subduction process, the crust source material was obviously added in the magmatic source area, while the mixed contamination of the crust source material during the primitive magma uplift indicated that the formation of the ore-bearing rock body in the south of Huangshan is not directly related to the Tarim igneous province. Although the 未 ~ (4) N ~ (34) S value of Cu-Ni sulphide ore from South Huangshan magma is between -1.54 鈥，

本文編號(hào)：1902399