Scar Crags and Dale Head North in the English Lake District host mineralised veins enriched in ‘Energy Critical Elements’ (ECEs) specifically, bismuth, cobalt and copper. A limited number of studies in the 1970s investigated the mineralogy and inferred the genesis of these veins as being related to the intrusion of the Lake District batholith.

This study investigates the geology, mineralogy, composition and paragenesis of these two mineralised areas. The results highlight the ubiquitous presence of Co–Fe–Ni-sulfarsenides in both deposits and the presence of some mineral species, hitherto unreported. Scar Crags samples contained high concentrations of cobalt, commonly present within arsenopyrite, whereas cobalt is of minor importance at Dale Head North, where copper and arsenic are the primary metals. A sequence of events, with As–Co–Ni-bearing fluids infilling the veins after an initial stage of quartz and chlorite precipitation is the most striking resemblance between the two mineralised systems, potentially indicating a common process for Co-rich vein-type deposits in the area. If so, understanding such processes could prove vital in aiding exploration in other terranes.

英吉利湖区的疤痕碎片和戴尔黑德州北部拥有矿脉，这些矿脉富含“能源关键元素”（ECE），特别是铋，钴和铜。1970年代有限的研究调查了矿物学，并推断这些矿脉的成因与湖区岩基的侵入有关。

这项研究调查了这两个矿化地区的地质，矿物学，组成和共生作用。结果强调了迄今为止尚未发现的钴-铁-镍-硫化砷在矿床中的普遍存在以及某些矿物质的存在。疤痕碎片样品中的砷含量高，通常存在于毒砂中，而在戴尔黑德州北部，钴是次要的，那里的铜和砷是主要金属。一系列事件，在石英和亚氯酸盐沉淀的初始阶段之后，含As-Co-Ni的流体充满了静脉，这是两个矿化系统之间最惊人的相似之处，可能表明富含Co的脉型矿床的共同过程在那地区。如果是这样，那么了解这些过程可能对帮助其他地层勘探至关重要。