全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Bryan T. Barney , Christiane Munkholm , David R. Walt ...
来源:[J].BMC Genomics(IF 4.397), 2017, Vol.18 (1)Springer
摘要:Atlantic cod ( Gadus morhua ), is known to vary genetically across the North Atlantic, Greenland, and Newfoundland. This genetic variation occurs both spatially and temporally through decades of heavy fishing, and is concentrated in three linkage disequilibrium blocks, previously...
作者:Michèle Verhaert , Alain Bernard , Augustin Dekoninck ...
来源:[J].Mineralium Deposita(IF 2.147), 2017, Vol.52 (7), pp.1049-1068Springer
摘要:... In the Cu deposit of Jbel Klakh, several stages of supergene mineralization are distinguished: (1) the replacement of hypogene sulfides in the protolith (chalcopyrite) by secondary sulfides in the cementation zone (bornite, digenite, chalcocite, covellite), (2) the formation...
作者:Thomas Aiglsperger , Joaquín A. Proenza , Mercè Font-Bardia ...
来源:[J].Mineralium Deposita(IF 2.147), 2017, Vol.52 (7), pp.1069-1083Springer
摘要:Ni-laterites from the Dominican Republic host rare but extremely platinum-group element (PGE)-rich chromitites (up to 17.5 ppm) without economic significance. These chromitites occur either included in saprolite (beneath the Mg discontinuity) or as ‘floating chromitites’ wit...
作者:Walid Salama , Ravi Anand , Anthony Morey ...
来源:[J].Mineralium Deposita(IF 2.147), 2019, Vol.54 (8), pp.1207-1228Springer
摘要:Abstract(#br)This study reports data on the first occurrence of economic supergene Au in a near-surface silcrete horizon over the Scuddles volcanic massive sulfide (VMS) deposit in the Golden Grove district, Western Australia. A deep weathering profile was developed on dacite, rh...
作者:Lei Chen , Jianwei Li
来源:[J].Chinese Science Bulletin(IF 1.319), 2014, Vol.59 (24), pp.2999-3009Springer
摘要:Abstract(#br)Supergene jarosite is widely distributed in weathering profiles derived from hypogene sulfide ores. Precise 40 Ar/ 39 Ar dating and determination of hydrogen and oxygen isotopes of supergene jarosite can not only place tight constraints on the timing and history of...
作者:Dave Craw , Gemma Kerr
来源:[J].Applied Geochemistry(IF 1.708), 2017, Vol.85, pp.19-34Elsevier
摘要:Abstract(#br)Supergene alteration of gold deposits has had important geochemical effects that changed the mineralogy and textures of near-surface exposures and can affect the economics of gold mines by enhancing gold liberation and increasing gold grades. This study links obse...
作者:Z. Ren , P.M. Vasconcelos
来源:[J].Geochimica et Cosmochimica Acta(IF 3.884), 2019, Vol.260, pp.84-98Elsevier
摘要:Abstract(#br)Hypogene and supergene alunite and jarosite grains in the 500–200, 200–100, 100–50, 50–10, and <10 µm sieve-size ranges were neutron-irradiated in vacuum-sealed Si-glass capsules to permit direct quantification of 39 Ar displaced by recoil during irradiatio...
作者:Theodore A. DeMatties
来源:[J].Ore Geology Reviews(IF 2.417), 2018, Vol.95, pp.216-237Elsevier
摘要:Abstract(#br)Three cycles of paleoweathering and supergene activity have been identified within the Penokean Volcanic Belt (PVB) of northern Wisconsin, Michigan and east-central Minnesota, USA. These cycles are responsible for significant subaerial weathering, erosion, oxidatio...
作者:Xiao-Dong Deng , Jian-Wei Li
来源:[J].Mineralogy and Petrology(IF 1.681), 2017, Vol.111 (2), pp.253-265Springer
摘要:The Dongxiangqiao Mn deposit in Hunan Province is one of numerous supergene Mn-oxide deposits in central South China. This deposit is derived from chemical weathering of Permian Mn-rich shales and limestones. Mn-oxide samples from the Dongxiangqiao deposit consist mainly of ...
作者:G. Arfè , N. Mondillo , M. Boni ...
来源:[J].Ore Geology Reviews(IF 2.417), 2018, Vol.95, pp.1076-1105Elsevier
摘要:... In both occurrences, the supergene Zn-carbonates and silicates infill solution cavities, or replace the carbonate host rocks and/or the primary sulfides, forming smithsonite- and hemimorphite-rich mineralizations. The analyzed drill core samples have on average 20 wt% Zn an...

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