CAJ | 학술논문

晚侏罗世是南岭地区与花岗岩类有关钨锡矿的大规模爆发期,成岩成矿年龄集中在150~160 Ma,与成矿有关的花岗岩属于高钾钙碱性系列的花岗岩类。本文搜集了已发表的主量、微量、稀土元素和 Sr-Nd 同位素数据,根据稀土元素标准化图解将上述花岗岩划分为“海鸥式”和“斜倾式”两类,通过对比发现这两种类型花岗岩在主量元素、微量元素和Sr-Nd同位素组成上也有明显的差异。根据Ca/(Mg+Fe)-Al/(Mg+Fe)图解对上述两类花岗岩的物质来源进行了区分,认为“斜倾式”花岗岩的源区更为复杂。此外,依据典型矿物、SiO2-P2O5、Rb-Y、Rb-Th 图解对两类花岗岩的成因类型进行了划分。
만주라세시남령지구여화강암류유관오석광적대규모폭발기,성암성광년령집중재150~160 Ma,여성광유관적화강암속우고갑개감성계렬적화강암류。본문수집료이발표적주량、미량、희토원소화 Sr-Nd 동위소수거,근거희토원소표준화도해장상술화강암화분위“해구식”화“사경식”량류,통과대비발현저량충류형화강암재주량원소、미량원소화Sr-Nd동위소조성상야유명현적차이。근거Ca/(Mg+Fe)-Al/(Mg+Fe)도해대상술량류화강암적물질래원진행료구분,인위“사경식”화강암적원구경위복잡。차외,의거전형광물、SiO2-P2O5、Rb-Y、Rb-Th 도해대량류화강암적성인류형진행료화분。
Late Jurassic, especially 150-160 Ma, is the most important period of W-Sn polymetallic mineralization in the Nanling region. The ore bearing granitoids are alkaline and high-potassium, and their major and trace element concentrations and Sr-Nd isotopic compositions are reviewed in this contribution. The ore bearing granites can be divided into two subgroups which are characterized by “sea-gull type-” and“inclining type-” REE patterns. Moreover, the two subgroups show distinct major and trace element and Sr-Nd isotopic characteristics. Ca/(Mg+Fe) vs. Al/(Mg+Fe) diagram shows that the two subgroups of granites were derived from different sources. SiO2 vs. P2O5, Rb vs. Y and Rb vs. Th diagrams also demonstrate that the W and Sn bearing granites are of different genetic types.