Significance of a Cambrian date from galena lead-isotope data for the stratiform Cottonbelt deposit in the Monashee Complex, southeastern British Columbia
Significance of a Cambrian date from galena lead-isotope data for the stratiform Cottonbelt deposit in the Monashee Complex, southeastern British Columbia
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不列颠哥伦比亚省东南部莫纳西杂岩层状棉带矿床的方铅矿铅同位素数据确定的寒武纪年代的意义
DOI：
10.1139/e88-145
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发表时间：
1988
影响因子：
1.4
通讯作者：
C. Godwin
中科院分区：
文献类型：
--
作者：
T. Höy;C. Godwin
Cottonbelt 矿床是不列颠哥伦比亚省东南部 Monashee Complex 的 Frenchman Cap dome 覆盖岩内的大型层状铅锌磁铁矿层。对铅同位素比图上靠近寒武纪-哈德林纪边界的矿床地块的方铅矿样品进行的铅同位素分析，与育空地区 Anvil Camp 早寒武世层状矿床的分析类似。这些数据表明，棉带矿床和宿主演替的年龄属于寒武纪，而其他解释则表明法国帽穹顶覆盖演替的年龄要大得多。因此，这些覆盖岩被认为是下古生代陆架岩石的钙质相和泥质相，目前暴露在东南部的库特尼岛弧和东部的塞尔扣克山脉中。
The Cottonbelt deposit is a large stratiform lead–zinc–magnetite layer within cover rocks of Frenchman Cap dome in the Monashee Complex in southeastern British Columbia. Lead-isotope analyses of galena samples from the deposit plot close to the Cambrian–Hadrynian boundary on lead-isotope ratio diagrams and are similar to analyses of Early Cambrian stratiform deposits in the Anvil Camp in the Yukon Territory. These data suggest that the Cottonbelt deposit and host succession are Cambrian in age, in contrast to other interpretations that suggest considerably older ages for the cover succession of Frenchman Cap dome. These cover rocks, therefore, are considered calcareous and pelitic facies of lower Paleozoic shelf rocks now exposed in the Kootenay Arc to the southeast and the Selkirk Mountains to the east.