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大地构造与成矿学 1986
ENSIALICACTIVATIONMETALLOGENYINNORTHAMERICA,ACOUNTERPARTOFTHECHINESEDIWAMETALLOGENY, PP. 1-23 Keywords: 成矿学,大地构造,活化,拉兹,北美,北关,地物,三资,上口,月相 Abstract: ThiscontributionpresentsabriefreviewoftheNorthAmericanactivationmetallogeny,comparablewiththeChinesediwa.Threetypesofmineralizedterrainsaretreated:1)Regionsoflargely"cold"(proximalintrusionsabsent)Pb-Zn,fluoriteandbaritemineralizationincarbonate-dominatedplatformsrestingonPrecambriancrystallinebasement.There,severalvarietiesoforesoftenlumpedtogetherunderthedesignationof"MississippiValleytype"aremostcommon.2)Regionsof"cold"uraniuminfiltrationalmineralizationinporoussandstonesintheblock-faultedWyomingForelandBelt.3)Regionsof"hot"activationinintracontinentalmountainandorogenicbelts,intrudedbysmallhigh-levelcalc-alkalinetoalkalineintrusionsanddiscontinuouslycoveredbyvolcanicfields.TheColoradoRockyMountainsaredescribedingreaterdetailandadditionalregionsinNorthAmericaarebrieflylisted.
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