SEDIMENTOLOGY, MINERALOGY AND ORIGIN OF THE FIRST DISCOVER MAGNESITEDOLOMITE BELT IN MA’RIB DISTRICT, SW ARABIAN PENINSULA

Sa’ad Zeki A.kader AL-MASHAIKIE

doi:https://doi.org/10.19111/bmre.82662

Makale detayları

SEDIMENTOLOGY, MINERALOGY AND ORIGIN OF THE FIRST DISCOVER MAGNESITEDOLOMITE BELT IN MA’RIB DISTRICT, SW ARABIAN PENINSULA

Yazarlar:

Sa’ad Zeki A.kader AL-MASHAIKIE

Yayıncı:

Maden Tetkik Arama Genel Müdürlüğü

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Bulletin of the Mineral Research and Exploration 2017 Vol.154 Issue 154, pp.109-133

Belge Tipi:

Makale

Yayın Tarihi:

4/2017

Belge Dili:

İngilizce

Document ID (Org No.):

2000520187

Sıklık:

Üç Yıllık

pISSN:

0026-4563

DOI:

https://doi.org/10.19111/bmre.82662

Özet:

 


Magnesite mineralization of high purity was discovered and described herein for the first time from metamorphosed folded belt from Al-Thanyiah locality in Rub’Al-Khali sector, 360 km east of Sana’a City, northwest Yemen. The magnesite-metamorphic belt, belonging to the Precambrian/Neoproterozoic age? comprises thrust belt, which trends generally N-S direction. Magnesite mineralization was identified in an extended carbonate-metamorphic belt for several tens of kilometers cf. 31 km and occurred in association with 8 stratigraphic units. The thicknesses of pure magnesite bearing units are variable and ranges from 20 to 60 m. associated with dark green chlorite-schist with intersecting huge ultrabasic intrusions. Geochemical, mineralogical and petrographic analysis show that the magnesite concentrations in the stratigraphic units are ranging from 78% up to high purity of 99.6% cf. 35 to 48.9% MgO, with minor dolomite and calcite respectively. Little to rare content of talc and brucite were also recognized. Two thick, productive and high purity magnesite beds, the first is of 40 m thick and the second is 60 m in thickness, which reveals more than 95% MgCO3 and considered to be economic. The suggested origin of the magnesite mineralization is coming from high stress of regional metamorphism associated with ultramafic intrusions cf. amphibolite and harzburgite associated with diagenetic solutions rich in Mg2+, associated with the heat of magma. The alteration of dolomite to magnesite was formed by multiple phases to transform calcite and/or dolomite to magnesite.


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Makale detayları

SEDIMENTOLOGY, MINERALOGY AND ORIGIN OF THE FIRST DISCOVER MAGNESITEDOLOMITE BELT IN MA’RIB DISTRICT, SW ARABIAN PENINSULA

Yazarlar: Sa’ad Zeki A.kader AL-MASHAIKIE

Yayıncı: Maden Tetkik Arama Genel Müdürlüğü

Ana Başlıklar: Uygulamalı fizik

Dergi: Bulletin of the Mineral Research and Exploration 2017 Vol.154 Issue 154, pp.109-133

Belge Tipi: Makale

Yayın Tarihi: 4/2017

Belge Dili: İngilizce

Document ID (Org No.): 2000520187

Sıklık: Üç Yıllık

pISSN: 0026-4563

DOI: https://doi.org/10.19111/bmre.82662

Sayı

Yazarlar:

Sa’ad Zeki A.kader AL-MASHAIKIE

Yayıncı:

Maden Tetkik Arama Genel Müdürlüğü

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Bulletin of the Mineral Research and Exploration 2017 Vol.154 Issue 154, pp.109-133

Belge Tipi:

Makale

Yayın Tarihi:

4/2017

Belge Dili:

İngilizce

Document ID (Org No.):

2000520187

Sıklık:

Üç Yıllık

pISSN:

0026-4563

DOI:

https://doi.org/10.19111/bmre.82662