Criteria for Recognit
Criteria for Recognit
Criteria for Recognit
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<strong>Recognit</strong>ion of Extension-Rifting Environments inAncient SuccessionsPetrochemical <strong>Criteria</strong>:Ancient rift successions have a chemostratigraphy defined bydistinct petrochemical assemblages of mafic and felsic rocks that areindicative of an extension that differ somewhat with geodynamicsetting and, there<strong>for</strong>e, with Lithostratigraphic Deposit TypeA VMS productive rift succession should contain high-temperaturefelsic (e.g., FIII-FII, HFSE-enriched) and mafic (e.g., BON-LOTI,MORB) volcanic (intrusive) rocks
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