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V.—The Leadhills-Wanlockhead Lead and Zinc Deposits

Published online by Cambridge University Press:  06 July 2012

A. K. Temple
A. K. Temple
Affiliation:
Department of Geology, University of Leeds
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Synopsis

The Leadhills–Wanlockhead mining field is situated within a synclinorial belt of greywackes, bounded to the north and south by anticlinoria in which lower stratigraphical elements are exposed. The universal strike is N.E.–S.W. The southern margin of the northern anticlinorium is delimited by a strike thrust fault, inclined to the north-west. The shear zone caused by this thrust is considered to be the principal structural feature governing the localization of the ore deposits.

The complex N.E.–S.W. folding and faulting, imposed during the Caledonian orogeny, is crossed by a series of intersecting joints, whose average strike is N.N.W. The majority of the mineral veins also trend N.N.W. The formation of these discordant structural features under Caledonian stress is demonstrated by the presence of N.N.W. trending Caledonian dykes.

Sinistral movement along the joint pattern, ascribed to a reorientation of the “Caledonian” stress towards an “Hercynian” direction, resulted in the formation of open spaces on the more north-westerly trending members of the joint system in the greywacke belt. This feature is considered to be the secondary structural control responsible for the localization of the ore deposits.

Fifty-seven minerals were identified from the deposits. Fifteen of these minerals had not been previously recorded from the locality, including (1) a new chromian mineral; (2) a new variety, chromian leadhillite; (3) a mineral previously recorded only as an artificial product, lead hydroxyapatite; (4) phœnicochroite, not previously confirmed in the British Isles.

Two periods of mineralization were distinguished. The first consisted of quartz veins with which are associated small amounts of gold, pyrite and muscovite, tentatively assigned to the Caledonian orogeny, and the second comprised the lead-zinc mineralization. The paragenetic relationships of the primary minerals of the lead-zinc mineralization indicate two generations of sulphides; the second generation is accounted for by reprecipitation of elements derived from the replacement of the first generation by late stage quartz. A study of the distribution of elements through the paragenesis suggests that some elements were derived from other than a magmatic source, and that contamination has probably played a considerable rôle in the control of the character of the gangue minerals.

Evidence that the mineralizing solutions had a deep-seated origin is provided by the mineral zones and the geochemical character of the deposit. Emplacement of the minerals took place at a temperature of the order of 143°−281° C, and a depth of the order of 2000–4000 feet below the surface.

The Leadhills–Wanlockhead deposits are related to other lead-zinc deposits in Britain. On the basis of geochemical assemblage and the relation to igneous activity, it is concluded that the deposits were probably derived from the top of the tholeiitic crustal layer and the base of the granitic crustal layer, and were genetically associated with the Hercynian orogeny.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 63 , Issue 1 , 1956 , pp. 85 - 113
Copyright
Copyright © Royal Society of Edinburgh 1956

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References

References to Literature

Allen, E. T., Crenshaw, J. L., Johnston, J., and Larsen, E. S., 1912. “The mineral sulphides of iron”, Amer. J. Sci., (4), 33, 169.CrossRefGoogle Scholar
Allen, E. T., Crenshaw, J. L., and Merwin, H. E., 1914. “The effect of temperature and acidity in the formation of marcasite (FeS2) and wurtzite (ZnS); a contribution to the genesis of unstable forms”, Amer. J. Sci., (4), 38, 393.CrossRefGoogle Scholar
Anderson, A. L., 1930. “The incipient alteration of galena”, Econ. Geol., 25, 528.CrossRefGoogle Scholar
Anderson, H. V., and Chesely, K. G., 1933. “X-ray study of the transformation of marcasite into pyrite”, Amer. J. Sci., (5), 25, 315.CrossRefGoogle Scholar
Blyth, P. G. H., 1949. “The sheared porphyrite dykes of South Galloway”, Q.J.G.S., 105, 393.CrossRefGoogle Scholar
Borovick, S. A., and Propenko, N. M., 1938. “Germanium in sulphide ores”, Bull. Acad. Sci. U.B.S.S., Cl. Math. Nat. Ser. Geol., 341.Google Scholar
Brown, R., 1918. “The mines and minerals of Leadhills”, Trans. Dumfr. Gall. Nat. Hist. Soc., 6, 124.Google Scholar
Brown, R., 1925. “More about the mines and minerals of Wanlockhead and Leadhills”, Trans. Dumfr. Gall. Nat. Hist. Soc., 13, 58.Google Scholar
Buerger, M. J., 1934. “The pyrite-marcasite relation”, Amer. Min., 19, 37.Google Scholar
Butler, B. S., and Vanderwilt, J. W., 1933. “The Climax molybdenum deposit”, Bull. U.S. Geol. Surv., 846 C.Google Scholar
Collie, N., 1889. “On some Leadhills minerals”, J. Chem. Soc. Lond., 55, 90.CrossRefGoogle Scholar
Dunham, K. C., 1934. “The genesis of the North Pennine ore deposits”, Q.J.G.S., 90, 689.CrossRefGoogle Scholar
Dunham, K. C., 1948. “The geology of the North Pennine orefield. Vol. I. Tyne to Stainmore”, Mem. Geol. Surv. Google Scholar
Dunham, K. C., 1950. “The geology, paragenesis, and reserves of the ores of lead and zinc”, Int. Geol. Congr., 1948.Google Scholar
Dunham, K. C., 1952. “Age relations of the epigenetic mineral deposits of Britain”, Trans. Geol. Soc. Glasg., 21, 395.CrossRefGoogle Scholar
Edwards, A. B., 1947. Textures of the Ore Minerals.Google Scholar
Edwards, A. B., 1952. “The ore minerals and their textures. Clarke Memorial Lecture”, J. Proc. Roy. Soc. N.S.W., 85, 26.Google Scholar
Emmons, W. H., 1924. “Primary downward changes in ore deposits”, Trans. Amer. Inst. Min. (Metall.) Engrs., 70, 29.Google Scholar
Evrard, P., 1945. “Minor elements in sphalerites from Belgium”, Econ. Geol., 40, 568.CrossRefGoogle Scholar
Finlayson, A. M., 1910. “The metallogeny of the British Isles”, Q.J.G.S., 66, 281.CrossRefGoogle Scholar
Gabrielson, O., 1945. “Studies on the distribution of elements in Swedish sphalerites”, Sverig. Geol. Unders., 39.Google Scholar
Goldschmidt, V. M., 1954. Geochemistry.CrossRefGoogle Scholar
Heddle, M. F., 1923. The Mineralogy of Scotland. Part I.Google Scholar
Heddle, M. F., 1924. The Mineralogy of Scotland. Part II.Google Scholar
Hey, M. H., 1950. Chemical Index of Minerals.Google Scholar
Jones, O. T., 1922. “The mining district of North Cardiganshire and West Montgomeryshire”, Mem. Geol. Surv. Miner. Resour., 30.Google Scholar
Kennedy, W. Q., 1948. “Crustal layers and the origin of ore deposits”, Schweiz. Min. Petrogr. Mitt., 28.Google Scholar
Kennedy, W. Q., and Anderson, E. M., 1938. “Crustal layers and the origin of magmas”, Bull. Volcan., Ser. II, 3, 23.CrossRefGoogle Scholar
Kennedy, W. Q., and Read, H. H., 1936. “The differentiated dyke of Newmains, Dumfriesshire, and its contact and contamination phenomena”, Q.J.G.S., 92, 116.CrossRefGoogle Scholar
Koch, S., and Grassely, Gy., 1951. “Processes occurring at the decomposition of sulphide ores”, Acta Univ. Szeged., Acta Min., Petrogr., 5, 15.Google Scholar
Kullerud, G., 1953. “The FeS-ZnS system. A geological thermometer”, Norsk. Geol. Tidskr., 32, 61.Google Scholar
Lindgren, W. L., 1933. Mineral Deposits.Google Scholar
Lovering, T. S., 1935. “Geology and ore deposits of the Montezuma Quadrangle, Colorado”, Prof. Pap., U.S. Geol. Surv., 178.Google Scholar
MacGregor, A. G., 1929. Report on the Area around Lamb Knowes and Sowen Dod, with reference to the possibility of lead-bearing veins.Google Scholar
MacGregor, A. G., 1944. “Barytes in Central Scotland”, Geol. Surv. Wartime Pamphl. No. 38.Google Scholar
MacGregor, M., 1937. “The western part of the Criffel-Dalbeattie Igneous Complex”, Q.J.G.S., 93, 457.CrossRefGoogle Scholar
MacGregor, M., and MacGregor, A. G., 1948. “The Midland Valley of Scotland”, British Regional Geology.Google Scholar
Mitchell, J., 1919. “The Wanlockhead Lead Mines”, Min. Mag., 21.Google Scholar
Niggli, P., 1929. Ore Deposits of Magmatic Origin.Google Scholar
Niggli, P., 1941. “Die Systematik der magmatischen Erzlagerstatten”, Schweig. Min. Petrogr. Mitt., 21, S. 161.Google Scholar
Oftedahl, I., 1940. “Untersuchungen uber die Nebenbestandteile von Erzmineralien norwegischer zinkblende-fuhrender Vorkommen”, Skr. Norske Vidensk., Akad., I, Mat.-naturv. KL, No. 8.Google Scholar
Peach, B. N., and Horne, J., 1899. “The Silurian Rocks of Britain. Vol. I. Scotland”, Mem. Geol. Surv. U.K. Google Scholar
Pettijohn, F. J., 1949. Sedimentary Rocks.Google Scholar
Porteous, J. M., 1876. God's Treasure House in Scotland.Google Scholar
Pringle, J., 1948. “The South of Scotland”, Brit. Reg. Geol. Google Scholar
Rankama, K., and Sahama, Th. G., 1950. Geochemistry.CrossRefGoogle Scholar
Richey, J. E., 1939. “The dykes of Scotland”, Trans. Edin. Geol. Soc., 13, pt. iv.Google Scholar
Schmedeman, O. C., 1938. “Notes on the chemistry of ore solution”, Econ. Geol., 33, 785.CrossRefGoogle Scholar
Siegl, W., 1936. “Uber Tarnowitzi und Plumbocalcit von Tsumeb (Sudwestafrika)”, Miner. Petrogr. Mitt. (Tscher-maks.), 48, 286.Google Scholar
Smythe, J. A., and Dunham, K. C., 1947. “Ankerites and chalybites from the northern Pennine orefield and the north-east coalfield”, Min. Mag., 28, 53.Google Scholar
Stoiber, R. E., 1940. “Minor elements in sphalerite”, Econ. Geol., 35, 501.CrossRefGoogle Scholar
Swartzlow, C., 1933. “Note on the alteration of galena to anglesite, to cerussite”, Amer. Min., 18, 174.Google Scholar
Temple, A. K., 1954 a. “The paragenetical mineralogy of the Leadhills and Wanlockhead lead-zinc deposit”, Unpublished Thesis, University of Leeds.Google Scholar
Temple, A. K., 1954 b. ”Rammelsbergite from the Southern Uplands of Scotland”, Min. Mag., 30, No. 227. [In the press.]Google Scholar
Trotter, F. M., 1944. “The age of the ore deposits of the Lake District and the Alston Block”, Geol. Mag., 81, 223.CrossRefGoogle Scholar
Wager, L. R., 1929. “Metasomatism in the Whin Sill of the north of England. Part I. Metasomatism by lead vein solutions”, Geol. Mag., 66, 97.CrossRefGoogle Scholar
Warren, H. V., and Thompson, R. M., 1945. “Sphalerites from Western Canada”, Econ. Geol., 40, 309.CrossRefGoogle Scholar
Watson, J. A., 1937. “Crawford Muir; its mining history and minerals”, Edin. Geol. Soc., 13, 98.CrossRefGoogle Scholar
Wilson, G. V., 1921. “The lead, zinc, copper, and nickel ores of Scotland”, Mem. Geol. Surv., Miner. Resour., 17.Google Scholar