TheCentral Lapland Greenstone Belt (CLGB) is agreenstone belt located in the northern part of theFennoscandian Shield.[1] The region belongs toLapland, northernFinland. The CLGB is part of a much larger belt ofPaleoproterozoic greenstones, a cover ofmetamorphosedvolcanic andsedimentary rocks that cover theArchean basement, the latter which is representative of the Archaean Kareliancraton. Deposition of the cover sequence occurred between about 2.5Ga and 1.8 Ga, thus it preserves information aboutEarth's history from a period that encompass about 700 Ma.[citation needed]
Thus, the CLGB records a prolonged and episodic history ofrifting, sedimentation and magmatism before the collision and rift closure at about 1.9 Ga. The collision was related to the amalgamation of thesupercontinentColumbia. The CLGB is considered to have significant potential for gold deposits.[2]
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