摘要
新疆苏吉泉石墨矿床产在海西期花岗岩体中，矿石具十分独特的球状构造，石墨的δ１３Ｃ值分布范围为－２０．５‰－２３．９‰，平均值为－２２．０‰，表明该石墨矿床碳质的有机成因。围岩中特别是中石碳统的含碳沉积岩被海西中期花岗岩岩浆同化，使碳质聚集并重结晶成石墨。
The graphite deposit in Sujiquan, Xinjiang occurred in Hercynian granite is characterized by the unique spherical structrue of the graphite.The deposit has the δ13C values ranging from -20.5‰ to -23.9‰ with an average of -22.0‰.The carbon isotopic data indicate an organic origin of carbon in the graphite deposit. The deposit is thought to be resulted from the assimilation of the Middle Carboniferous carbonaceous sediments by the Middle Hercynian granite. Boiling and rolling of the assimilated carbon in the intruding granitic magma may account for the spherical structure of the graphite.
出处
《地球化学》
CAS
CSCD
北大核心
1996年第4期379-386,共8页
Geochimica
基金
国家自然科学基金
中国科学院地球化学研究所矿床地球化学开放实验室资助
关键词
石墨矿床
成因
碳同位素
graphite deposit
metallogeny
carbon isotope
Xinjiang
