ABSTRACT The Reefton goldfield includes the large Globe Progress and Blackwater deposits as well as ∼30 smaller deposits which are localised along a network of late syn- to post-metamorphic faults and shear zones that extend 25+ km in a northerly direction. The Globe Progress deposit is located in a unique structural site where this district-scale zone of mineralised faults and shear zones splits into two strands. Lense-shaped zones of mineralised quartz veins <100 m long which form the smaller deposits plunge parallel to intersections between their host faults and the S2 cleavage or bedding. Veining likely developed in minor dilational jogs where the faults refract across cleavage or bedding. Some dilational jogs formed during dextral strike-slip and transpressional-reverse movement along the host faults in response to a NE-SW oriented σ1. Faults that host the smaller deposits are located on east-dipping fold limbs, whereas the larger, tabular rather than rod-shaped, Birthday Reef at Blackwater is the only deposit and associated fault located on a WNW-dipping fold limb. This unusual structural setting was presumably more conducive to dilational opening in the prevailing stress field. None of the deposits within the goldfield are located in major fold hinges.

中文翻译：

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新西兰西部 Reefton 金矿区金矿的构造环境

摘要 Reefton 金矿包括大型 Globe Progress 和 Blackwater 矿床以及约 30 个较小的矿床，这些矿床位于晚同变质至后变质断层和剪切带网络，向北延伸 25 公里以上。Globe Progress 矿床位于一个独特的构造地点，该地区规模的矿化断层和剪切带在该地点分裂成两条链。透镜状矿化石英脉带 <100 m 长，形成较小的沉积物，平行于它们的主断层和 S2 解理或层理之间的交叉点。脉纹可能在次要的扩张慢跑中形成，其中断层折射穿过劈理或层理。响应 NE-SW 取向的 σ1，在沿着主断层的右旋走滑和横压反向运动期间形成了一些扩张慢跑。拥有较小沉积物的断层位于东倾褶皱翼上，而位于黑水的较大的、板状而非杆状的生日礁是唯一位于 WNW 倾角褶皱翼上的沉积物和相关断层。这种不寻常的结构设置可能更有利于主要应力场中的扩张开放。金矿区内没有一个矿床位于主要的褶皱铰链中。