科技英语翻译-昆工要点讲解.ppt

2014-15学年下学期 英汉摘要互译作业 Metallogeny of the Nicholas-Denys Pb–Zn–Ag deposit, Bathurst Mining Camp, Canada 作者： Michelle K. Deakina 期刊名：Ore Geology Reviews 出版时间：15 April 2014 页码：1-24 Metallogeny of the Nicholas-Denys Pb–Zn–Ag deposit, Bathurst Mining Camp, CanadaMichelle K. Deakina, Georges Beaudoina,*,Michel Malob a Département de Géologie et Génie Géologique, Université Laval, Sainte-Foy, Québec G1K 7P4, Canadab INRS, Centre Eau Terre Environnement, 490 rue de la Couronne, Québec, Québec G1K 9A9, Canada Abstract: The Nicholas-Denys Pb–Zn–Ag deposit, located in the Bathurst Mining Camp (New Brunswick), consists of several pyrrhotite-sphalerite–galena sulfide lenses hosted by black mudstone of the Millstream Formation of the Fournier Group, deposited in an Ordovician backarc basin.[1] The Nicholas-Denys sulfide lenses and hydrothermal alteration are conformable to the bedding-parallel S1 regional foliation, and are sheared parallel to the Rocky Brook-Millstream shear zone, indicating a pre-Devonian deformation timing for mineralization. [2] Metallogeny of the Nicholas-Denys Pb–Zn–Ag deposit, Bathurst Mining Camp, CanadaMichelle K. Deakina, Georges Beaudoina,*,Michel Malob a Département de Géologie et Génie Géologique, Université Laval, Sainte-Foy, Québec G1K 7P4, Canadab INRS, Centre Eau Terre Environnement, 490 rue de la Couronne, Québec, Québec G1K 9A9, Canada Reduced sulfur for Nicholas-Denys sulfides comes from bacte- rial reduction of Ordovician seawater sulfates in a system ope- n to sulfates under partially oxygenated bottomwater condi- tions, with addition of magmatic sulfur from underlying mafic volcanic rocks. [3] Lead was leached from the backarc basin sediments of the Millstream Formation mudstone and from underlying synvolcanic gabbros. [4] The mineralizing fluid for Nicholas-Denys sulfides was reduced and acidic, favorable for precipitation of a pyrrhotite-rich mineralization.Characteristics of the Nicholas-Denys deposit are compatible with a SEDE