Localities and Remarks.

Name.

Lode-minerals.

Rock-forming minerals.

Actinolite

—

As alteration-product in dyke rocks (p. 308).

Albite

Analcime

—

—

In some igneous rocks. As decomposition-product in basalts.

Anglesite
Anthracite
Antimonite
Apatite

Atacamite
Augite
Barytes

Biotite

Glenchass Mine (s)i - -
Laxey Mine (see p. 520)- -
Niarbyl Mine, (p. 546) - -
In a vein near Foxdale Granite (Kendall)
North Bradda, old workings (s)
— Foxdale; rare at Laxey (s); North Laxey
—

—

—In small crystals in many igneous rocks.
— Common in intrusive rocks.
— Common in igneous rocks, and
detrital in slates.

Calamine
Calcite

Cerussite

Chalcanthite
Chalcedony

Chalco-
pyrites

Chalybite (Siderite)
Chlorite

Chloritoid (Ottrelite)

Laxey (rare) (s) - - - —Comm on in lodes - - - Chief constituent of limestones, and alteration-product in basic igneous rocks, etc.Glenchass, .Rushen, and —
Bradda Mines (s).
Old workings, Laxey,Bradda(s)
Corsielly Mine: as Agate in
Bulwark Lode, North As pebbles, in Peel Sandstone
Bradda (s) and in Glacial deposits.
Laxey : Foxdale (rare); Maug
hold Head; Langness (s), — and other places
Foxdale, Cornelly, and other As decomposition-product in mines some igneous rocks.Bradda and Rushen Mines (s), Common as alteration-product.
and common in quartz veins
— In altered elvan on Greeba Mountain (p. 318) and prob ably in other altered rocks.

Cuprite
Dialogite
Dolomite

Bradda Mine (s) - -
Snaefell Mine (s) - - -
Common in lodes - - In Carboniferous Limestone and sparingly in decomposed basic rocks.

Localities and Remarks.
Name. —
Lode-minerals. Rock-forming minerals.

Epidote

Fahlerz

—

Common as alteration-product
especially in basic dykes.

(see Tetra
hedrite)

.

Felspar (see
Orthoclase,

Plagioclase,

etc.)
Fluor-spar Galena

Old Foxdale (s) - - -
In many lodes: more or less

—

—

Garnet

Gold’?
Graphite

Gypsum

Hematite
Hornblende

Ilmenite
Iron-pyrites
Kupfer-nickel

argentiferous
— see p. 549 - - - -
Snaefell Lode (impure) (s).
Beary (p. 550).
Many veins in Triassic and Carboniferous rocks in deep borings on The Ayre.
Maughold Mines - - -
Cornelly lode (s) - - -

—-
Common in lodes - - -Glenchass (s) - - - -

As alteration product; and detrital in grits.
— Graphitic slate in several localities: see p. 134.
—

—Common in intrusive rockb (see p. 301).
Common in many rocks. Common in many rocks.
—

Labradorite

—

In basic igneous rocks.

Leucoxene

As decomposition-product in igneous and metamorphic rocks.

Limonite Magnetite

Maughold Mines (s) - -
—

—Common in igneous rocks.

Malachite Malacolite

Bradda Lode (s) - - -
—

—Variety of augite common in basic dykes (p. 301).

Manganese

~par (see J)ialogite)
Marcasite
Melaconite
Melanterite
Mica (see
Muscovite, Biotite etc.)
Microcline
Millerite
Molybdenite
Muscovite

Laxey, Bradda (s), etc. - -
Laxey and Bradda Mines (s) -
Old workings, Laxey,-etc. (s) -

—
Trial-shaft at Rhenas (s) -
On joints in Dhoon Granite -
In many quartz veins (p. 320)

—

—

•

In Dhoon Granite elvan~ and
in granite at Cornelly Mine.
—

—Common rock-constituent.

Nickel - ores (see Kupfernickel and Millerite)

Ochre

Rushen and Bradda (s) - -

Name.

Localities and Remarks.

Lode-minerals.

Rock-forming minerals.

Oligoclase Olivine

—

—

Common in some igneous rocks. In basaltic dykes.

Opal

Orthoclase Picotite

Var. semi-opal; Cornelly Mine
(s)
—

—

—Common in igneous rocks.
In Carboniferous diabase

Plumbago (see Graphite)

(Hobsom).

Plurnosite Pyrites (see Iron - pyrites and Chalcopyrites

Foxdale Mine (p. 503) - -

—

Pyrolusite

Pyromor-phite
Pyrrhotite

Upper part of several lead-veins (s)
Rushen and Laxey Mines (s) -

Snaefell; Laxey (rare) (s) -

—

—

—

(Pyrrhotine)
Quartz

Chief constituent of veins in slates

Common rock-constituent.

Riebeckite

—

In Ailsa-Craig boulders in the drift.

Rutile

—

Common in altered slates and in some igneous rocks.

Sericite

—

Common as alteration-product in sheared rocks.

Serpentine

-

~

As decomposition - product after Olivmne.

Silver-ore

(see Fahlerz and

Plumosite)

Sphene

Staurolite

Steatite

—

—

Foxdale and Laxey Mines (s)

As alteration - product in igneous and metamorphic rocks. As alteration-product at margin of Dhoon granite; rare.
(G. Barrow.)
—

Stibnite (see

Antimonite)
Tetrahedrite
Tourmaline
Tremolite

Foxdale Mines (s) - - -
In quartz-veins near granite (see p. 143).

—

—Common as alteration-product in igneous and metamorphic rocks, etc.
Alteration-product in some dykes.

Uralite
Zinc-blonde

—
In many lodes - -

Variety of hornblende, common
in basic dykes (see p. 301).
—

(Sphalerite)
Zircon
Zoisite

, —
—

Small grains in grits ; also in igneous rocks.
As alteration-product in igneous rocks.

Any comments, errors or omissions gratefully received The Editor
HTML Transcription © F.Coakley , 2001