Tourmaline B-isotopes fingerprint marine evaporites as the source of high-salinity ore fluids in iron oxide copper-gold deposits, Carajás Mineral Province (Brazil)

Geology ◽  
2008 ◽  
Vol 36 (9) ◽  
pp. 743 ◽  
Author(s):  
Roberto Perez Xavier ◽  
Michael Wiedenbeck ◽  
Robert B. Trumbull ◽  
Ana M. Dreher ◽  
Lena V.S. Monteiro ◽  
...  
Keyword(s):  
Iron Oxide ◽  
High Salinity ◽  
Gold Deposits ◽  
Carajás Mineral Province ◽  
Copper Gold

Stable isotopes and fluid inclusion constraints on the fluid evolution in the Bacaba and Castanha iron oxide-copper-gold deposits, Carajás Mineral Province, Brazil

2020 ◽  
Vol 126 ◽  
pp. 103738 ◽  
Author(s):  
André Luiz Silva Pestilho ◽  
Lena Virgínia Soares Monteiro ◽  
Gustavo Henrique Coelho de Melo ◽  
Carolina PenteadoNatividade Moreto ◽  
Caetano Juliani ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Iron Oxide ◽  
Fluid Inclusion ◽  
Gold Deposits ◽  
Carajás Mineral Province ◽  
Fluid Evolution ◽  
Copper Gold

Application of 3D magnetic amplitude inversion to iron oxide-copper-gold deposits at low magnetic latitudes: A case study from Carajás Mineral Province, Brazil

Geophysics ◽  
2015 ◽  
Vol 80 (2) ◽  
pp. B13-B22 ◽  
Author(s):  
Marcelo Leão-Santos ◽  
Yaoguo Li ◽  
Roberto Moraes
Keyword(s):  
Iron Oxide ◽  
Gold Deposits ◽  
Magnetic Data ◽  
Magnetic Latitude ◽  
Amplitude Inversion ◽  
Carajás Mineral Province ◽  
Amplitude Data ◽  
Copper Gold ◽  
Magnetic Amplitude

Strong hydrothermal alteration modifies rock physical properties in iron oxide-copper-gold deposits (IOCGs) and may result in characteristic signatures detectable in geophysical surveys. Magnetic data are commonly used in characterizing orebodies, and 3D inversions are often used to assist in interpretations. In areas with strong remanence and self-demagnetization, the total magnetization can have directions different from the inducing field direction. This deviation precludes the use of traditional inversion methods. Magnetic amplitude inversion offers one solution to this challenge because the amplitude data are weakly dependent on the magnetization direction. In addition, the low magnetic latitude also imposes difficulty in amplitude data calculation due to the instability in the component conversion in the wavenumber domain. To formulate a practical approach, we present a case study on applying the magnetic amplitude inversion to the Furnas southeast IOCG deposit at the low magnetic latitude in Carajás Mineral Province, Brazil, and demonstrate that the approach can reliably recover an interpretable distribution of effective magnetic susceptibility and identify massive magnetite from hydrothermal alterations associated with the high-grade ore.

scholarly journals Gold in iron oxide copper–gold deposits

2016 ◽  
Vol 72 ◽  
pp. 37-42 ◽  
Author(s):  
Zhimin Zhu
Keyword(s):  
Iron Oxide ◽  
Gold Deposits ◽  
Copper Gold

Very rapid subsurface hydrothermal ore deposition mechanisms and the origin of breccia-hosted iron-oxide copper–gold deposits

2009 ◽  
Vol 101 (1) ◽  
pp. 76 ◽  
Author(s):  
Nicholas H.S. Oliver ◽  
Michael J. Rubenach ◽  
Jaiby-Ann Jacob ◽  
Brian G. Rusk ◽  
Martina Bertelli ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Gold Deposits ◽  
Copper Gold ◽  
Ore Deposition

Spatial and temporal zoning of hydrothermal alteration and mineralization in the Sossego iron oxide–copper–gold deposit, Carajás Mineral Province, Brazil: paragenesis and stable isotope constraints

2007 ◽  
Vol 43 (2) ◽  
pp. 129-159 ◽  
Author(s):  
Lena V. S. Monteiro ◽  
Roberto P. Xavier ◽  
Emerson R. de Carvalho ◽  
Murray W. Hitzman ◽  
Craig A. Johnson ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Stable Isotope ◽  
Gold Deposit ◽  
Hydrothermal Alteration ◽  
Carajás Mineral Province ◽  
Copper Gold

Iron Oxide Copper-Gold DepositsGeology, Space-Time Distribution, and Possible Modes of Origin

2005 ◽  
Author(s):  
Patrick J. Williams ◽  
Mark D. Barton ◽  
David A. Johnson ◽  
Lluís Fontboté ◽  
Antoine de Haller ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Time Distribution ◽  
Space Time ◽  
Gold Deposits ◽  
Copper Gold
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