The South Range Breccia Belt of the Sudbury Impact Structure: A possible terrace collapse feature
The South Range Breccia Belt of the Sudbury Impact Structure: A possible terrace collapse feature
复制标题
萨德伯里冲击构造的南岭角砾岩带：可能的台地塌陷特征
DOI：
10.1111/j.1945-5100.2000.tb01432.x
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发表时间：
2000
影响因子：
2.2
通讯作者：
J. Spray
中科院分区：
文献类型：
--
作者：
R. G. Scott;J. Spray
摘要-南岭角砾岩带(SRBB)是位于1.85Ga萨德伯里撞击构造南段的萨德伯里角砾岩带的一个弧形、长45公里的带。该带的厚度从几十米到几百米不等，由胡伦超群(2.49-2.20Ga)、尼皮辛辉绿岩(2.2Ga)和元古界花岗岩类角砾岩碎屑组成，大小从几毫米到几十米不等。黑云母基质由黑云母、石英、钛铁矿组成的细粒(∼100μm)组合，含少量斜长石、锆石、钛铁矿、绿帘石、黄铁矿、黄铜矿、磁黄铁矿，偶见绿泥石。SRBB拥有Frood-Stobie、朱砂和柯克伍德石英闪长岩偏斜岩脉，前者与世界上最大的镍-铜-铂族硫化物矿床之一有关。
Abstract— The South Range Breccia Belt (SRBB) is an arcuate, 45 km long zone of Sudbury Breccia in the South Range of the 1.85 Ga Sudbury Impact Structure. The belt varies in thickness between tens of meters to hundreds of meters and is composed of a polymict assemblage of Huronian Supergroup (2.49–2.20 Ga), Nipissing Diabase (2.2 Ga), and Proterozoic granitoid breccia fragments ranging in size from a few millimeters to tens of meters. The SRBB matrix is composed of a fine‐grained (∼100 μm) assemblage of biotite, quartz, and ilmenite, with trace amounts of plagioclase, zircon, titanite, epidote, pyrite, chalcopyrite, pyrrhotite, and occasionally chlorite. The SRBB hosts the Frood‐Stobie, Vermilion, and Kirkwood quartz diorite offset dykes, the former being associated with one of the largest Ni‐Cu‐PGE sulphide deposits in the world.