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单词 master lode
释义

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master lode
master lode n.
ΘΚΠ
the world > the earth > minerals > mineral deposits > [noun] > vein > principal
master-vein1670
master lode1671
mother-lode1863
masterly lode1868
1671 Philos. Trans. (Royal Soc.) 6 2100 The ancient Tinners..affirm, that 7 Loads may lie parallel to each other in the same Hill, but yet one only Master-Load.
1758 W. Borlase Nat. Hist. Cornwall xiv. 148 That the little collateral veins are oftentimes filled, and at the same depth with like substance to the master-lode, will convince us that they were filled at the same time, by one and the same cause.
1822 Trans. Royal Geol. Soc. Cornwall 2 328 It [sc. the slate floor] is about a foot thick, and occupies the space between a side lode and a neighbouring master- lode, which is from twelve to eighteen feet.
1908 Daily Chron. 23 Dec. 5/7 A fine vein of lead ore..presenting all the characteristics of a master lode.
1987 E. F. Marina Mining Industr. Spain 78/2 The ore deposit consists of a series of hydrothermal quartz lodes,..of varied lengths from tens of metres up to the 1,400 m of the master-lode.
extracted from mastern.1adj.
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更新时间:2024/9/23 17:19:27