jacutingan.

/dʒakjuːˈtɪŋɡə/

Forms: Also 1800s jaco-.

Etymology: < Portuguese jacutinga (formerly jacú-tinga), Brazilian name of a kind of guan (jacu) (probably the black-fronted piping guan, Pipile jacutinga) whose plumage the ore is said to resemble.

A name given to various kinds of soft gold-bearing iron ore found in Brazil (see quot. 1963).

ΘΚΠ

the world > the earth > minerals > ore > [noun] > metal ore > iron ore > others

bloodstone1504

haematite1543

yellow share1590

keel1596

brush-ore1678

mush1686

brush-iron-ore1695

iron glance1792

specular iron (also iron ore)1796

steel-ore1796

oligistc1803

black band1811

old man1811

spathose iron-ore1823

pitticite1826

siderose1834

blink klip1835

pharmacosiderite1835

sphaerosiderite1837

fossil ore1846

jacutinga1846

vignite1846

siderite1848

junckerite1865

needle iron-ore1867

xanthosiderite1868

specularite1892

pitch ore1896

minette1902

taconite1905

1846 Trans. Royal Geol. Soc. Cornwall VI. 227 In both mines [sc. Itabira and Santa Anna, in Brazil] the directions and inclinations of the gold-bearing beds conform to the configuration of the neighbouring mountain, as well as to the structure of the contiguous rock;—a circumstance of common occurrence in jacotinga formations.

1851 Edinb. New Philos. Jrnl. 50 61 These [strata] are followed by the Jacotinga, the principal auriferous rock, which is for the most part composed of specular iron-ore and oxide [printed oixide] of manganese.

1869 R. F. Burton Explor. Highlands Brazil I. 301 The mysterious Jacutinga. The name is evidently derived from the well-known Penelope called Jácu-tinga (P. Leucoptera) from the white spots upon its crested head and blue-black wings. This substance of iron-black, with metallic lustre, sparkles in the sun with silvery mica... The constituents are micaceous iron schist and friable quartz mixed with specular iron, oxide of manganese, and fragments of talc.

1876 Encycl. Brit. IV. 224/2 Most gold is afforded by..the rock called Itacolumite,..and by certain iron ores known as Itabirite and Jacutinga.

1908 J. M. Maclaren Gold 649 With the itabirite are associated thin beds..of sandy micaceous and limonitic iron-ore containing yellowish talc and earthy oxides of manganese. These beds are generally friable, and appear to be a decomposition product of itabirite. The rock is locally known as jacutinga.

1934 H. F. Bain & T. T. Read Ores & Industries S. Amer. vi. 112 In places this [sc. itabirite] contains narrow veins of native gold, or of gold-bearing quartz, giving rise to what are known as jacutinga ores, which are peculiar to Minas Geraes.

1963 Prof. Papers U.S. Geol. Surv. No. 341 -C. 104/2 The term ‘jacutinga’ is now used indiscriminately for soft high-grade hematite, soft itabirite, or both, depending entirely upon the locality within the Quadrilátero Ferrífero. In short, it has only a local, not a general meaning and should not be used in scientific description without precise definition.

This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2020).

单词	jacutinga
释义	jacutingan. /dʒakjuːˈtɪŋɡə/ Forms: Also 1800s jaco-. Etymology: < Portuguese jacutinga (formerly jacú-tinga), Brazilian name of a kind of guan (jacu) (probably the black-fronted piping guan, Pipile jacutinga) whose plumage the ore is said to resemble. A name given to various kinds of soft gold-bearing iron ore found in Brazil (see quot. 1963). ΘΚΠ the world > the earth > minerals > ore > [noun] > metal ore > iron ore > others bloodstone1504 haematite1543 yellow share1590 keel1596 brush-ore1678 mush1686 brush-iron-ore1695 iron glance1792 specular iron (also iron ore)1796 steel-ore1796 oligistc1803 black band1811 old man1811 spathose iron-ore1823 pitticite1826 siderose1834 blink klip1835 pharmacosiderite1835 sphaerosiderite1837 fossil ore1846 jacutinga1846 vignite1846 siderite1848 junckerite1865 needle iron-ore1867 xanthosiderite1868 specularite1892 pitch ore1896 minette1902 taconite1905 1846 Trans. Royal Geol. Soc. Cornwall VI. 227 In both mines [sc. Itabira and Santa Anna, in Brazil] the directions and inclinations of the gold-bearing beds conform to the configuration of the neighbouring mountain, as well as to the structure of the contiguous rock;—a circumstance of common occurrence in jacotinga formations. 1851 Edinb. New Philos. Jrnl. 50 61 These [strata] are followed by the Jacotinga, the principal auriferous rock, which is for the most part composed of specular iron-ore and oxide [printed oixide] of manganese. 1869 R. F. Burton Explor. Highlands Brazil I. 301 The mysterious Jacutinga. The name is evidently derived from the well-known Penelope called Jácu-tinga (P. Leucoptera) from the white spots upon its crested head and blue-black wings. This substance of iron-black, with metallic lustre, sparkles in the sun with silvery mica... The constituents are micaceous iron schist and friable quartz mixed with specular iron, oxide of manganese, and fragments of talc. 1876 Encycl. Brit. IV. 224/2 Most gold is afforded by..the rock called Itacolumite,..and by certain iron ores known as Itabirite and Jacutinga. 1908 J. M. Maclaren Gold 649 With the itabirite are associated thin beds..of sandy micaceous and limonitic iron-ore containing yellowish talc and earthy oxides of manganese. These beds are generally friable, and appear to be a decomposition product of itabirite. The rock is locally known as jacutinga. 1934 H. F. Bain & T. T. Read Ores & Industries S. Amer. vi. 112 In places this [sc. itabirite] contains narrow veins of native gold, or of gold-bearing quartz, giving rise to what are known as jacutinga ores, which are peculiar to Minas Geraes. 1963 Prof. Papers U.S. Geol. Surv. No. 341 -C. 104/2 The term ‘jacutinga’ is now used indiscriminately for soft high-grade hematite, soft itabirite, or both, depending entirely upon the locality within the Quadrilátero Ferrífero. In short, it has only a local, not a general meaning and should not be used in scientific description without precise definition. This entry has not yet been fully updated (first published 1933; most recently modified version published online December 2020). < n.1846
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