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新疆若羌县长沙沟一带的基性-超基性岩位于阿尔金陆缘地块和祁漫塔格早古生代岛弧带结合部位,沿阿尔金断裂带状展布,为镁铁质-超镁铁质岩带。岩石主要由橄榄岩、辉橄岩和辉石岩和辉长岩等组成;上部镁铁质岩主要由辉长岩(部分为橄榄辉长岩和辉石岩)组成,下部辉橄岩、橄榄岩、辉石岩相互过渡(且成堆晶结构)。1∶20万、1∶5万化探资料显示,沿基性-超基性杂岩带有Cu、N i、Co、C r、W等异常,异常重现性较好,特别是Cu、N i、Co、C r元素套合较好,极值较大,浓集中心显著;1∶5万地面高精度磁测显示区内有较好的磁异常8处,异常规模较大,并与基性-超基性岩体吻合。对部分高磁异常区激电中梯剖面扫面,发现高激电异常,极化率在3%左右,最高达17.8%。经野外初步检查,发现了大量的铜镍矿化和磁铁矿化体,并圈出了阿克萨依镍矿和长清磁铁矿,表明长沙沟基性-超基性杂岩带具有较好的铜、镍、铁找矿潜力。
The basic-ultramafic rocks located in the Long Shagou, Ruoqiang County, Xinjiang are located at the junction of the Argin land block and the Early Paleozoic arc belt of the Qimantag, spreading along the Altyn Tagh fault zone and are mafic-ultramafic Mafic rock belt. The rock is mainly composed of peridotite, peridotite and pyroxene and gabbro; the upper mafic rocks are mainly composed of gabbro (partly gabbro and pyroxene) Rocks and pyroxenes transition to each other (and into piled structures). 1: 200000, 1: 50000 geochemical data show that there are abnormalities such as Cu, Ni, Co, Cr and W along the basic-ultramafic complexes, and the anomalous reproducibility is good, especially Cu, N i, Co and C r elements are better nested together with larger extremums and strong concentration centers. In the 1: 50000 surface high-accuracy magnetic measurements, there are 8 good magnetic anomalies with large anomalies And basic - ultramafic rock mass consistent. For some high-magnetic anomalous zones, the middle-level section of the middle-level anomaly is found to be highly anomalous with a polarizability of about 3% and a maximum of 17.8%. After preliminary examination in the field, a large amount of copper-nickel mineralization and magnetite mineralization were discovered, and the Aksayi nickel ore and Changqing magnetite were excavated, indicating that the Changsha-Fuji basal-ultramafic complex belt has Better copper, nickel, iron ore prospecting potential.