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| | Report (issue) | | mines area of the famous Bou Azzer cobalt-mining district. We have seen pink
cobalt-rich calcite from Bou...the towns of Oumjrane and Alnif in Er Rachidia Province,
Meknès-Tafilalt region—see, in the January-February...three classic localities, namely the Jamestown district, Tuolumne County; the Eagle’s
Nest mine, Placer...Placer County; and (more vaguely) the Grass Valley district in the Mother
Lode country. Habits vary, but all...collection.
Gold, 4.2 cm, from the Jamestown district, Tuolumne
County, California. Mineral Classics | 👁 Image
| | Journal (article/letter/editorial) | | Liberian province ( ~ 2500
Ma), the Eburnean province (ca. 2000 Ma) and the Pan-African province (ca. 600...early Archean cratonie rocks in Liberia and
eastern Sierra-Leone. They consist of a complex assemblage of...which extends along a belt from Liberia through Sierra Leone into
Guinea consists of high-grade quartzo-feldspathic...scattered relics within the Archean
craton in eastern Sierra Leone, Liberia and Guinea. These include the Kambui...greater part of the West African craton in eastern Sierra Leone, Liberia,
Guinea and Ivory Coast is however | 👁 Image
| | Journal (article/letter/editorial) | | rces
of SierraLeone
S. •¾. }•OREL
Abstract
Sierra Leone forms the central part of the sundered West...the Atlantic ocean.
TheArchean
rocks
ofSierra
Leone
consist
ofa granitic
basement
containing
elements...detrital sediments.Theseare mineralizedwith gold,chromite,
tin, copper,nickel, antimony,arsenic,and iron...residuallaterite, and lateritic detritential of Sierra Leone dates from 1918 when the
tus as well as poor...communicationshave
agreedto financea geological
made Sierra Leone a difficult country in which to Colonialgovernment | 👁 Image
| | Journal (article/letter/editorial) | | clusters in Guinea, two Jurassic-aged clusters
in Sierra Leone, and in Liberia two clusters of unknown age...cluster pipes in
Guinea, the Koidu pipes in Sierra Leone and small pipes in the Weasua cluster in Liberia...Jurassic kimberlites are considered to represent one province of kimberlites that track from older bodies in...Ma) to progressively younger kimberlites in Sierra Leone (Koidu, 146 Ma and Tongo, 140 Ma). The scarcity...Geochronology; Petrography; Mineral chemistry; Sierra Leone; Guinea; Liberia
1. Introduction
The kimberlites | 👁 Image
| | Report (issue) | | The geology and mineral
resources of northern
Sierra Leone
A. Macfarlane, M. J. Crow,]. W. Arthurs,
A....The
geology and mineral resources of northern
Sierra Leone. Overseas Nlem. Inst. Ceo{.
Sci., No. 7.
Aulh11rs...Stratigraphy 30
The Tabe-Makani Formation 31
The eastern margin of the Rokel River Group 31
The Sainya Scarp...The Taban Outlier 32
The Teye Formation 33
The eastern margin of the Rokel River Group 33
The western...processing 79
Appendix 2 The geochronology of Sierra Leone
Post tectonic intrusives 89
The Rokelide Belt | 👁 Image
| | Journal (issue) | | ARTICLES
The Geology and Mineral Resources of Sierra Leone. By J. D. Pollett,
A.R.S.M., A.M.I.M.M., Director...Director, GeologicalSurvf)' Department, Sierra
Leone
.
.
.
.
.
.
.
.
.
.
.
Note on the Geology of the Somaliland...Resources in Northern Rhodesia
Mineralisation of the eastern Belgian Congo
South Africa's First Oil from Coal...Colonies
•
•
Geological Map of Sierra Leone
•
Mineral Map of Sierra Leone
•
•
•
•
•
•
•
•
. facing...Malaya, Northern Rhodesia, Nigeria, Gold Coast, Sierra Leone, Tanganyika and British Guiana; already it is | 👁 Image
| | Journal (article/letter/editorial) | | hypabyssal samples from the Jurassic
of
Tongo dike (Sierra Leone) and the Neoproterozoic Weasua cluster (Liberia)...Jurassic age (135-155 Ma) in Guinea, Liberia, and Sierra Leone and one of Neoproterozoic
Jo
age (~800 Ma;...Man Craton have been described from Liberia, Sierra Leone
ur
and Guinea. At least two provinces are...are recognized: 1) a dominant Jurassic-aged province
comprising the Droujba, Bouro, Banankoro, Koidu, Tongo...Mano Godua clusters
Jo
and 2) a Neoproterozoic province represented by the Weasua cluster (Figure 1) (e | 👁 Image
| | Book | | RELATIONSHIP OF THE MALAWI CARBONATITEALKALINE PROVINCE AND THE LUPATA-LEBOMBO VOLCANICS
237
A, R. Woolley...14
THE EVOLUTION OF THE TIBESTI VOLCANIC PROVINCE, EASTERN SAHARA
P. M., Vincent
:
15
THE STRUCTURAL...CONTROL OF DYKES AND RELATED IRRUPTIVE ROCKS IN EASTERN
AFRICA
337
\
J. R. Vail
17
GEOCHEMICAL VARIATIONS...concentrations. Such was the
study of the Nuanetsi Igneous Province in Rhodesia. The ring complexes
there appeared...200.
The parent magma of the British Tertiary Province. Summ. Progr. geol. Surv. G.B.,
Pt. 2 (for 1930) | 👁 Image
| | Report (issue) | | ___________________ _
Cape of Good Hope Province ___________ _
Transvaal Province ____ -_-_------------Natal __..._Ruanda- Urundi __ -------------------------Sierra Leone------------------------------Somali Republic...Coastal
Plain province ___________________ _
Stream sediments in the Coastal Plain
province ________________________...and placers in the
Blue Ridge province _____________ _
Spruce Pine district ____________ Madison County...Haywood
County _____________________ _
Zirconia district ___________ ----Macon, Jackson, and Clay Counties |
|
