Contribution to petrology and K/Ar Amphibole data for plutonic rocks of the Haggier Mts., Socotra Island, Yemen

Title:

Contribution to petrology and K/Ar Amphibole data for plutonic rocks of the Haggier Mts., Socotra Island, Yemen

Creator:

František Fediuk and Balogh, Kadosa

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:c791d78d-d400-4772-a5af-ff430dc9ae85
uuid:c791d78d-d400-4772-a5af-ff430dc9ae85
issn:1214-9705

Subject:

Geologie. Meteorologie. Klimatologie, amfibolity, amphibolites, Jemen, Yemen, Neoproterozoic, coronitic gabbronorite, peralkaline granite, Socotra, Arabian-Nubian Shield, K/Ar data, 7, and 551

Type:

article, články, model:article, and TEXT

Format:

print, bez média, and svazek

Description:

A morphologically distinct intrusive massif emerges from sedimentary Mesozoic/Tertiary cover in Eastern Socotra forming the high Haggier Mts. It is mostly composed of peralkaline a nd hypersolvus granite partly accompanied by gabbroic rocks. Amphibole, the sole mafic mineral of th e granite, shows predominately the arfvedsonite composition, while riebeckite, for which Socotra is reported in most manuals of mineralogy as the "locus typicus", occurs subordinately only. Either Paleozoic or Tertiary age has been assumed for this massif for a long time. In the last decade, however, K/Ar datings have been published clearly showing Precambrian (Ne oproterozoic) age. The present authors confirm with somewhat modified results this statement by five new radiometric measurements of monomineral amphibole fractions yiel ding values of 687 to 741 Ma for granites and 762 Ma for gabbroic rocks. The massif represents an isolated segment of numerous late postorogenic Pan-African A-granite bodies piercing the Nubian-Arabian Shield an d is explained as the result of partial melting of Pan-African calc-alkaline shield rocks in the closing stage of the orogeny., Ferry Fediuk and Kadosa Balogh., and Obsahuje bibliografické odkazy

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Acta geodynamica et geomaterialia : | 2009 Volume:6 | Number:4 (156)

Harvested from:

CDK

Metadata only:

false