ZINC DEPOSITS RELATED TO DIAGENESIS AND INTRAKARSTIC SEDIMENTATION IN THE LOWER ORDOVICIAN ST. GEORGE FORMATION, WESTERN NEWFOUNDLAND.

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作者：

Collins, Jon A.

Smith, Leigh

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Bulletin of Canadian Petroleum Geology | 1975年 / 23卷 / 03期

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摘要：

A detailed analysis was made of the geologic environments related to the Lower Ordovician carbonates hosting sphalerite mineralization near Daniel's Harbour, western Newfoundland. Sphalerite mineralization in the Lower Ordovician St. George Formation occurs in a white dolomite pseudobreccia confined to a unit of dolomite-mottled limestone and dolomite. This section is interbedded dolomite-mottled biointrapelsparite and dolomitized micrite deposited in two cyclically alternating epeiric environments. Two models for Zn precipitation can be suggested for the paleohydrologic system: 1) mobilization of 10 to 50 ppm Zn from host-rock carbonates by meteoric waters, and precipitation ″downstream″ at the interface with formation fluids; 2) precipitation of Zn by meteoric water dilution of upward-welling, Zn-rich formational chloride brines. Refs.

引用

页码：393 / 427

共 12 条

[1] Dolomitization of the Lower Ordovician Watts Bight Formation of the St. George Group, western Newfoundland: evidence of hydrothermal fluid alteration
Conliffe, James
Azmy, Karem
Knight, Ian
Lavoie, Denis
CANADIAN JOURNAL OF EARTH SCIENCES, 2009, 46 (04) : 247 - 261
[2] THE ST GEORGE GROUP (LOWER ORDOVICIAN) OF WESTERN NEWFOUNDLAND - TIDAL FLAT ISLAND MODEL FOR CARBONATE SEDIMENTATION IN SHALLOW EPEIRIC SEAS
PRATT, BR
JAMES, NP
SEDIMENTOLOGY, 1986, 33 (03) : 313 - 343
[3] High-resolution isotope stratigraphy of the Lower Ordovician St. George Group of western Newfoundland, Canada: implications for global correlation
Azmy, Karem
Lavoie, Denis
CANADIAN JOURNAL OF EARTH SCIENCES, 2009, 46 (06) : 403 - 423
[4] THE STRATIGRAPHY OF THE LOWER ORDOVICIAN ST-GEORGE GROUP, WESTERN NEWFOUNDLAND - THE INTERACTION BETWEEN EUSTASY AND TECTONICS
KNIGHT, I
JAMES, NP
CANADIAN JOURNAL OF EARTH SCIENCES, 1987, 24 (10) : 1927 - 1951
[5] ALGAL-METAZOAN BIOHERMS OF LOWER ORDOVICIAN AGE - ST-GEORGE GROUP, WESTERN NEWFOUNDLAND
PRATT, BR
AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS, 1980, 64 (05): : 767 - 768
[6] Carbon-isotope stratigraphy of the Lower Ordovician succession in Northeast Greenland: Implications for correlations with St. George Group in western Newfoundland (Canada) and beyond
Azmy, Karem
Stouge, Svend
Christiansen, Jorgen L.
Harper, Dave A. T.
Knight, Ian
Boyce, Douglas
SEDIMENTARY GEOLOGY, 2010, 225 (1-2) : 67 - 81
[7] CONODONT PALEOECOLOGY OF THE LOWER ORDOVICIAN ST-GEORGE GROUP, PORT AU PORT PENINSULA, WESTERN NEWFOUNDLAND
JI, ZL
BARNES, CR
JOURNAL OF PALEONTOLOGY, 1994, 68 (06) : 1368 - 1383
[8] Dolomitization of the lower St. George Group on the Northern Peninsula in western Newfoundland: implications for lateral distribution of porosity
Azmy, K.
Conliffe, J.
BULLETIN OF CANADIAN PETROLEUM GEOLOGY, 2010, 58 (04) : 361 - 374
[9] Origin of dolomites in the Boat Harbour Formation, St. George Group, in western Newfoundland, Canada: implications for porosity development
Azmy, K.
Knight, I.
Lavoie, D.
Chi, G.
BULLETIN OF CANADIAN PETROLEUM GEOLOGY, 2009, 57 (01) : 81 - 104
[10] GRAPTOLITES FROM THE LOWER MIDDLE ORDOVICIAN ST GEORGE AND TABLE HEAD GROUPS, WESTERN NEWFOUNDLAND, AND THEIR CORRELATION WITH TRILOBITE, BRACHIOPOD, AND CONODONT ZONES
WILLIAMS, SH
BOYCE, WD
JAMES, NP
CANADIAN JOURNAL OF EARTH SCIENCES, 1987, 24 (03) : 456 - 470

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