X

Interested in the Harquail School of Earth Sciences?

Fill out this form and we will contact you with details about our programs!

Learn More!
?

Publication Type:

Journal Article

Source:

Economic GeologyEconomic Geology, Volume 109, Number 1, p.27-59 (2013)

ISBN:

0361-0128<br/>1554-0774

Abstract:

The 2704 to 2695 Ma Blake River Group in the southern Abitibi greenstone belt comprises a well preserved submarine volcanic sequence that hosts a large number of VMS and important Au-rich VMS deposits, including the world-class Horne and LaRonde-Penna deposits. Establishing precise chronostratigraphic control on the VMS deposits within the Blake River Group is critical because numerous distinct events took place within a period of 9 m.y. Nineteen new high-precision U-Pb ages temporally constrain the host rocks of many polymetallic VMS deposits and associated synvolcanic intrusions, demonstrating that these VMS deposits formed throughout the protracted volcanic evolution of the entire group. Ages on host rocks of the Horne (2702.2 ? 0.9 Ma), Quemont (2702.0 ? 0.8 Ma), and Fabie (2701.9 ? 0.9 Ma) deposits reveal that they are among the oldest VMS deposits in the Blake River Group. The giant Horne Au-rich VMS deposit had already formed when the Cu-Zn deposits of the Noranda mine sequence, including Millenbach and Amulet, were generated at ~2698 Ma and is thus unrelated, consistent with its different volcanological setting and metal content. Large Au-rich VMS deposits of the Bousquet Formation, including LaRonde Penna and Bousquet 2-Dumagami, were formed at 2698 to 2697 Ma and are distinctly younger than the Horne and Quemont deposits. There were, therefore, two major time-stratigraphic intervals within the Blake River Group that were favorable for the formation of Au-rich VMS deposits. Rhyolite hosting the large Bouchard-H?bert VMS deposits yielded an age of 2695.8 ? 0.8 Ma. Important mineralizing events in the Blake River Group occur at ca. 2-m.y. intervals apart and are associated with major magmatic episodes. Recognition of specific time-stratigraphic intervals for different styles of mineralization and geologic settings is essential to improve exploration models within the Blake River Group and for similar volcanic assemblages elsewhere in the Archean.


casibomizmir escortizmir escort bayanMarsbahis güncel girişMarsbahis güncelMarsbahis giriş güncelMarsbahis girişMarsbahisBetturkey güncel girişBetturkey güncelBetturkey giriş güncelBetturkey girişBetturkeySekabet güncel girişSekabet güncelSekabet giriş güncelSekabet girişSekabetDinamobetDinamobet girişDinamobet giriş güncelDinamobet güncelDinamobet güncel girişFixbetFixbet girişFixbet giriş güncelFixbet güncelFixbet güncel girişMatadorbetMatadorbet girişMatadorbet giriş güncelMatadorbet güncelMatadorbet güncel girişBahiscasinoBahiscasino girişBahiscasino giriş güncelBahiscasino güncelBahiscasino güncel girişBahsegelBahsegel girişBahsegel giriş güncelBahsegel güncelBahsegel güncel girişBahiscomBahiscom girişBahiscom giriş güncelBahiscom güncelBahiscom güncel girişPadişahbetPadişahbet girişPadişahbet giriş güncelPadişahbet güncelPadişahbet güncel girişGalabetGalabet girişGalabet giriş güncelGalabet güncel girişGalabet güncelParibahisParibahis girişParibahis giriş güncelParibahis güncelParibahis güncel girişBetcioBetcio girişBetcio giriş güncelBetcio güncelBetcio güncel girişUltrabetUltrabet girişUltrabet giriş güncelUltrabet güncelUltrabet güncel girişOnwinOnwin girişOnwin giriş güncelOnwin güncelOnwin güncel girişİzmir escortEscort izmirİzmir escort bayanEscort bayan izmirBuca escortEscort bucaBuca escort bayanEscort bayan bucaBornova escortEscort bornovaBornova escort bayanEscort bayan bornovaKarşıyaka escortEscort karşıyakaKarşıyaka escort bayanEscort bayan karşıyakaÇiğli escortEscort çiğliÇiğli escort bayanEscort bayan çiğliÇeşme escortEscort çeşmeÇeşme escort bayanEscort bayan çeşmeKonak escortEscort konakKonak escort bayanEscort bayan konakAlsancak escortEscort alsancakAlsancak escort bayanEscort bayan alsancakİzmit escortEscort izmitİzmit escort bayanEscort bayan izmitKocaeli escortEscort kocaeliKocaeli escort bayanEscort bayan kocaeliGebze escortEscort gebzeGebze escort bayanEscort bayan gebzeSakarya escortEscort sakaryaSakarya escort bayanEscort bayan sakaryaSerdivan escortEscort serdivanSerdivan escort bayanEscort bayan serdivanSapanca escortEscort sapancaSapanca escort bayanEscort bayan sapancaTekirdağ escortEscort tekirdağTekirdağ escort bayanEscort bayan tekirdağÇorlu escortEscort çorluÇorlu escort bayanEscort bayan çorluÇerkezköy escortEscort çerkezköyÇerkezköy escort bayanEscort bayan çerkezköyankara escortcasibom바카라사이트바카라사이트casibom girişhacklink satışAntalya escortEscort antalyaAntalya escort bayanEscort bayan antalyaAlanya escortEscort alanyaAlanya escort bayanEscort bayan alanyaManisa escortEscort manisaManisa escort bayanEscort bayan manisaKuşadası escortEscort kuşadasıKuşadası escort bayanEscort bayan kuşadasıÇanakkale escortEscort çanakkaleÇanakkale escort bayanEscort bayan çanakkaleKonya escortEscort konyaKonya escort bayanEscort bayan konyaKayseri escortEscort kayseriKayseri escort bayanEscort bayan kayseriGaziantep escortEscort gaziantepGaziantep escort bayanEscort bayan gaziantepMersin escortEscort mersinMersin escort bayanEscort bayan mersinBodrum escortEscort bodrumBodrum escort bayanEscort bayan bodrumFethiye escortEscort fethiyeFethiye escort bayanEscort bayan fethiyeElazığ escortEscort elazığElazığ escort bayanEscort bayan elazığAdana escortEscort adanaAdana escort bayanEscort bayan adanaSamsun escortEscort samsunSamsun escort bayanEscort bayan samsunDenizli escortEscort denizliDenizli escort bayanEscort bayan denizliMalatya escortEscort malatyaMalatya escort bayanEscort bayan malatyaEskişehir escortEscort eskişehirEskişehir escort bayanEscort bayan eskişehirDiyarbakır escortEscort diyarbakırDiyarbakır escort bayanEscort bayan diyarbakırVan escortEscort vanVan escort bayanEscort bayan vanHatay escortEscort hatayHatay escort bayanEscort bayan hatayCasibomCasibom girişCasibom giriş güncelCasibom güncelCasibom güncel girişPusulabetPusulabet girişİzmir escortEscort izmirİzmir escort bayanEscort bayan izmirDoha escortEscort dohaDoha escortsQatar escortEscort qatar바카라사이트Buca escortEscort bucaBuca escort bayanEscort bayan bucaBornova escortEscort bornovaBornova escort bayanEscort bayan bornova