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阿巴列克地区位于西昆仑铅、锌、铜等多金属矿带的中部,该区具有极大的找矿潜力。为阐述成矿物质来源,本文系统测定了该区霍什拉甫组8条地层剖面82件样品的稀土元素组成。分析结果表明,样品的稀土元素含量变化较大,其∑REE、∑LREE、∑HREE、Y含量的变化范围分别为(7.52~220.70)×10-6(、5.82~198.46)×10-6、(1.49~32.74)×10-6和(4.77~91.30)×10-6;绝大多数样品的球粒陨石标准化配分模式均为典型的LREE富集型(∑LREE/∑HREE平均值6.57),轻重稀土分馏显著[(La/Yb)N平均值8.20],并具弱负Eu异常(δEu平均值0.77),Ce异常不明显(δCe平均值0.88)。对比研究发现,阿巴列克地区地层样品与西昆仑多金属矿带内其它四个代表性矿床(铁克里克、塔木、卡兰古、托库孜阿特)的岩石、矿石样品的稀土元素组成特征较一致,表明该矿带众多矿床的成矿物质与围岩二者间存在密切的成因联系。
The Abarek region is located in the central part of the West Kunlun lead, zinc, copper and other polymetallic ore belts, which has great prospecting potential. In order to elucidate the source of ore-forming materials, we systematically determined the REE composition of 82 samples from 8 stratigraphic sections of the Hohrabu Formation in this area. The results show that the contents of rare earth elements in the samples vary greatly, and the ranges of ΣREE, ΣLREE, ΣHREE and Y are (7.52 ~ 220.70) × 10-6 (5.82 ~ 198.46) × 10-6, (1.49 ~ 32.74) × 10-6 and (4.77 ~ 91.30) × 10-6, respectively. Most of the normal chondrite meteoric patterns of the most samples are typical LREE-enriched (ΣLREE / ΣHREE average 6.57) The REE fractional fractionation is significant [(La / Yb) N average 8.20], with weak Eu anomalies (δEu average of 0.77) and Ce anomalies (δCe average of 0.88). The comparative study found that the stratigraphic samples of the Abalak region are related to the samples of rock and ore samples from the other four representative deposits in the West Kunlun polymetallic ore belt (Iron Creek, Tarim, Calangu and Tokizat) The composition of REE is consistent, indicating that there are close genetic relationships between the metallogenic materials and the surrounding rock of many deposits in the ore belt.