摘要
通过对闽粤地区震旦系、寒武系、泥盆系和石炭一二叠系四个含铁层位中铁矿床的矿石和自生沉积岩的研究认为,它们同属海底热液喷溢产物.初步建立了它们的地球化学标型特征:铁矿石组分TiO_2-Al_2O_3呈正相关、Co/Ni比值和Ge、Cl、F含量均高;铁矿石和自生沉积岩均属低铝-钾-磷型;硅质岩的δ^(30)Si为-0.5‰~0.4‰;铁矿石的ΣREE为3.04~61.84ppm,轻、重稀土分馏不明显,层状热液沉积岩的ΣREE为120.18~551.88ppm,轻、重稀土分馏明显,两者Ce亏损不明显、Eu具弱的正或负异常;铁矿石的残留硅条带中包体均一温度为165~355℃.
Investigations of Fe-ore deposits of Fujian-Guangdong Area in Sinian, Cambrian, Devonian and Permian horizons and the autogenetic sediments reveals that they are resulted from the hydrothermal fluid flooding at sea floor. The typical geochmical chracteristics are established:1. Fe-ores are in high values of Ge, Cl and F showing positive correlation of TiO_2 and Al_2O_3.2. They are low in Al, P and K and have a range of -0.5~0.4‰ for δ^(30)Si of silicious rocks.3. Fe-ores have a REE range of 3.04~61.84 ppm without significant fraetionation of HREE and LREE while the layerd hydrothermal sedimentary rocks has a REE range of 120.18/557.88ppm with significant fractionation of HREE and LREE, and the both have no significant Ce depletion with only weak Eu enrichment or depletion.4. Fluid inclusion in residual bands in Fe-ores has a homogenization temperature range of 165-355°
出处
《地质找矿论丛》
CAS
CSCD
1993年第3期14-27,共14页
Contributions to Geology and Mineral Resources Research