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rock bulk chemical cf. mineral assem

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Journal Article
Journal: Economic Geology
Published: 01 December 2002
Economic Geology (2002) 97 (8): 1889–1920.
... reactions between fluids, precipitating ore minerals, and host rocks undergoing hydrothermal alteration. The complexity of these processes demands an integrated approach of geologic, geochemical, and experimental investigations (cf. Hedenquist and Richards, 1998 ). The key role of hydrothermal fluids...
FIGURES | View All (10)
Journal Article
Journal: Economic Geology
Published: 01 December 2001
Economic Geology (2001) 96 (8): 1743–1774.
... reactions between fluids, precipitating ore minerals, and host rocks undergoing hydrothermal alteration. The complexity of these processes demands an integrated approach of geologic, geochemical, and experimental investigations (cf. Hedenquist and Richards, 1998 ). The key role of hydrothermal fluids...
FIGURES | View All (10)
Journal Article
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 261–278.
...-to-WNW sense of shear (Fig. 1). Shear criteria include S C fabrics, ó clasts and feldspar bookshelf structures. D4 was locally associated with penetrative phyllonitization of the Grob gneiss (concentrated along the tectonic contact with overlying cover rocks). Mineral chemistry Mineral chemical data were...
Series: Economic Geology, Economic Geology
Published: 01 January 2005
DOI: 10.5382/AV100.28
EISBN: 9781934969519
...-Ag deposits exhibit many similar geological and geochemical features that include: (1) location close to regionally extensive normal and strike-slip synsedimentary faults, (2) organic-rich black shale and siltstone host rocks, (3) laminated, bedding-parallel synsedimentary sulfide minerals, (4...
Journal Article
Published: 01 June 2011
The Canadian Mineralogist (2011) 49 (3): 691–706.
... the Lynx kimberlite, also in Quebec. We have characterized the morphology of a representative sample of the population of Lynx diamond xenocrysts recovered through bulk sampling operations. A subset of twenty stones was selected for chemical analysis on the basis of visible inclusions. The diamond crystals...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2006
Clay Minerals (2006) 41 (3): 751–774.
... source of error in estimating palaeotemperatures was eliminated by this approach. For two wells from the extreme west and east locations (Chochołów and Bukowina Tatrzańska), quantitative mineral composition of the bulk rock was measured by XRD, following the method of Środoń et al . (2001...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2006
Clay Minerals (2006) 41 (1): 47–150.
...C. V. JEANS Abstract The clay mineralogy of the Cretaceous strata of the British Isles is described and discussed within its lithostratigraphical and biostratigraphical framework using published and unpublished sources as well as 1400 new clay mineral analyses. The regional clay mineral variation...
FIGURES | View All (48)
Journal Article
Published: 01 June 2011
The Canadian Mineralogist (2011) 49 (3): 721–747.
.... REPRESENTATIVE COMPOSITIONS OF MINERALS IN SAMPLES DISCUSSED IN THE TEXT Area A A B C D D Rock type pel pel pel pel IF sif IF sif Sample PP-08-08B St PP-08-08B Ms PP-06-27C Ms PP-06-28C Ms PP-06-24C Opx PP-06-29B Opx Cation proportions, in atoms per formula unit ( apfu...
FIGURES | View All (13)
Series: Economic Geology, Economic Geology
Published: 01 January 2005
DOI: 10.5382/AV100.19
EISBN: 9781934969519
... and/or hydraulic pump to collect and drive the fluids, and the chemical and physical processes which result in precipitation of the sulfides. Metal sources are undoubtedly red-bed sedimentary rocks containing Fe oxyhydroxides capable of weakly binding metals. Sulfur may be derived from marine or lacustrine...
Journal Article
Published: 01 June 1966
Bulletin of Canadian Petroleum Geology (1966) 14 (2): 273–321.
... that the quartz fraction of the Besa River is largely of organic or chemical origin. The evidence suggests a southeasterly provenance for the clay minerals, and the difficulty in visualizing transport of these clays across the evaporite basins of southern Alberta and Saskatchewan leads to the suggestion...
Journal Article
Published: 01 August 1983
Journal of the Geological Society (1983) 140 (4): 577–599.
...C. M. Graham; K. M. Greig; S. M. F. Sheppard; B. Turi Abstract During high-pressure, low-temperature greenschist and epidote-amphibolite facies metamorphism in Dalradian rocks of the SW Scottish Highlands, mineral assemblages in metabasites and calcareous metasediments were dominantly controlled...
Journal Article
Published: 01 February 1999
Journal of the Geological Society (1999) 156 (1): 41–46.
... of mafic minerals of the anorthosites may also in part be explained by a relatively large input from the lower crustal rocks. Hence, the model negates the need for extensive crystal fractionation prior to the formation of the anorthosite, and explains the lack of mafic cumulates. The Sr and Nd isotopic...
Journal Article
Published: 01 December 1995
Bulletin of Canadian Petroleum Geology (1995) 43 (4): 433–460.
... versus preservation. Organic facies, as defined by incident light microscopy and maceral assem- blages, have been correlated with depositional facies and cycles to exemplify first-order controls on source rock accu- mulation. Areally widespread basin-floor laminites from the Upper Devonian Duvernay...
Journal Article
Published: 01 February 1977
Journal of the Geological Society (1977) 133 (2): 123–131.
... rocks. Texturally, the rocks containing these minerals appear iden- tical with their counterparts in the Scourian granulites, but the value of their evidence is reduced by the facts that pyroxenic assemblages in the ultramafic rocks may be primary (cf. Davies I974, Josey & Shaw in Davies i974...
Journal Article
Journal: Economic Geology
Published: 01 January 2010
Economic Geology (2010) 105 (1): 91–118.
... Samples: Vein, wall-rock, and alteration mineralogy; methods and data source Fluid inclusions: types, description and data extent Location Main lithologic units Alteration Sample no. Vein type Vein minerals additional to qtz Vein selvage Vein width (mm) Wall rock Alteration/matrix...
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Journal Article
Published: 01 April 1977
Journal of the Geological Society (1977) 133 (4): 343–355.
.... Finger L. W. Homogeneity of minerals in mantle rocks from Lesothor b. Carnegie Instn Wash 1975 74 519 25 Forsyth D. Press F. Geophysical tests of penological models of spreading lithosphere J geophys Res 1971 76 7963 79 Forsyth D. Uyeda S. On the relative...
Journal Article
Published: 01 April 1992
Journal of the Geological Society (1992) 149 (2): 237–248.
... by the degree of retrograde phyllosilicate growth (see also Bartley 1982). Growth of bio- tite, chlorite and muscovite a t the expense of pyroxene, amphibole and feldspar in the basement rocks is considered to have a critical weakening effect (cf. Tullis & Mardon 1984) which enables penetrative ductile...
Journal Article
Published: 01 September 1998
Journal of the Geological Society (1998) 155 (5): 813–828.
... or contamination? Chemical Geology 1993 103 271 281 Rollin K.E. Gibbons W. Harris A.L. Geophysical correlation of Precambrian rocks of northern Britain A revised correlation of Precambrian rocks in the British Isles 1994 22 London Geological Society 65 74 Special Reports...
Journal Article
Published: 01 December 1974
Journal of the Geological Society (1974) 130 (6): 509–524.
.... Butler B. C. M. A chemical study of some rocks of the Moine Series of Scotland Q Jl geol Soc Land 1965 121 163 208 Chinner G. A. The kyanite isograd in Glen Clova, Angus, Scotland Mineral Mag 1965 34 132 143 Chinner G. A. The distribution of pressure and temperature...
Journal Article
Published: 01 March 1965
Bulletin of Canadian Petroleum Geology (1965) 13 (1): 155–180.
... than 0.2 ram. in diameter, and rich in car- bonaceous matter interpreted as fecal pellets (Folk, 1962, pp. 64 f.; Purdy, 1962, pp. 332 f.) form a minor constituent. The bulk of the rock consists of anhedral, cryptocrystalline (see Appendix) calcite with rare patches of coarser ca lc i te - probably...