發(fā)布時間：2018-06-11 23:20

  本文選題：地球化學 + 成因�。� 參考：《礦床地質》2017年01期

【摘要】：東鄉(xiāng)銅礦床的賦礦巖石以石炭系砂巖和燕山期花崗斑巖為主。文章對東鄉(xiāng)銅礦床同位素地球化學進行了研究,探討了成礦物質來源及礦床成因。東鄉(xiāng)礦區(qū)塊狀礦石和花崗斑巖的黃鐵礦δ~(34)S值(0.3‰~1.2‰)非常接近深部地幔硫的值,其δ~(34)S值呈現明顯的塔式分布,分布范圍較窄,表明礦石中的硫主要來自深源巖漿。δ~(65)Cu值分布范圍較窄(-2.10‰~0.17‰),整體接近于零附近,明顯不同于塊狀硫化物礦床(δ~(65)Cu=-0.98‰~3.14‰)、矽卡巖型礦床(δ~(65)Cu=-1.29‰~2.98‰)和熱液脈型礦床中δ~(65)Cu值(-3.70‰~0.44‰)的分布范圍,其δ~(65)Cu值變化范圍大于巖漿礦床的δ~(65)Cu值(-0.62‰~0.40‰),更接近于斑巖型礦床的δ~(65)Cu值(-1.16‰~0.81‰),表明東鄉(xiāng)銅礦與巖漿熱液作用具有密切的成因聯系。因此,推斷東鄉(xiāng)銅礦為巖漿熱液型礦床。
[Abstract]:Carboniferous sandstone and Yanshanian granitic porphyry are the main ore-bearing rocks in Dongxiang copper deposit. Isotopic geochemistry of Dongxiang copper deposit is studied in this paper. The 未 ~ (34) S value of pyrite in block ore and granitic porphyry in Dongxiang mine is very close to the value of sulfur in deep mantle, and the 未 ~ (34) S value of pyrite is very close to the value of sulfur in the deep mantle. The 未 ~ (34) S value of the ore and granitic porphyry is of obvious tower distribution, and the distribution range is relatively narrow. The results show that the sulfur in the ore mainly comes from the deep magma. The distribution range of 未 -2.10 鈥，

本文編號：2007111