And apatite . by these analyses and comparison with general granite both in china and the world and with the granite in other au or cu belt in china , the characteristics of the granite in this area are concluded as follows . it belongs to magnetite - i or syntectic granite and has crust - mantle mixed characteristics ; it was formed mainly by crystallization differentiation of melting magma and multiphase varied intrusion ; the degree of differentiation evolvement is not high ; the granite and its enclaves p . re congenetic ; the range of temperature is about 500 - 700 , the range of pressure is about 2 . 50 gpa - 4 . 35 gpa , and the range of oxygen fugacity ( lg fo2 ) is - 15 . 53 - - 14 . 00 ; most granite bodies formed before the collision of plates , and few formed after the collision of plates 通過對測試數(shù)據(jù)的分析與綜合研究,并同中國和世界一般花崗巖類以及中國主要金、銅成礦巖體的花崗巖類進(jìn)行對比,得出本區(qū)花崗巖類巖石具有以下特征:屬磁鐵礦-型或同熔型花崗巖,其巖漿物質(zhì)具殼?;煸刺卣鳎褐饕扇廴趹B(tài)巖漿經(jīng)結(jié)晶分異作用,通過多期變速上侵而形成;其分異演化程度較低;寄主巖基和包體具有同源性;巖石的形成溫度范圍約為500 - 700 ,壓力大約為2 . 50gpa - 4 . 35gpa ,氧逸度值1gfo _ 2為- 15 . 53 ? 14 . 00 ;該巖帶主要形成于板塊碰撞前消減的活動板塊邊緣期,為燕山至喜馬拉雅早期的大陸邊緣火山弧環(huán)境的產(chǎn)物。