干旱区生态环境知识资源中心(Arid): Weathering products at the historic Qulaan gold prospect, Eastern Desert, Egypt: Implication on the mobility and distribution of arsenic, gold and silver

Arid

DOI	10.1016/j.jafrearsci.2021.104276
	Weathering products at the historic Qulaan gold prospect, Eastern Desert, Egypt: Implication on the mobility and distribution of arsenic, gold and silver
	Ramzey, Mohamed; Abd El-Rahman, Yasser; Said, Amir
通讯作者	Abd El-Rahman, Y (corresponding author), Cairo Univ, Fac Sci, Geol Dept, Giza 12613, Egypt.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2021
卷号	182
英文摘要	Gold mineralization of the historic Qulaan prospect is hosted in hydrothermally altered rhyolite. A variety of supergene minerals that includes arsenic, gold and silver phases were formed as a consequence of superimposed weathering on primary mineralization hosted in the hydrothermally altered rhyolite at the prospect. The arsenicbearing phases are represented mainly by arsenic-rich ferric oxyhydroxides and Ca-Fe arsenates (arseniosiderite). Gold occurs in the form of native platelet and irregular grains that are commonly associated with ferric oxyhydroxide, while the Ag-phase, represented by iodargyrite, occurs in sericite-rich cavities. The formation of these minerals is related to oxidation of primary arsenian pyrite during the weathering process. Although pyrite oxidation results in an acidic condition, the presence of arseniosiderite as well as iodargyrite and the association between ferric oxyhydroxide and gold indicate an increase in the pH during the weathering process. Relict feldspar as well as hydrothermal chlorite and calcite in the host rocks are responsible for neutralizing the earlier acidic condition during the weathering of rhyolite.
英文关键词	Weathering Arid Arsenic Arseniosiderite Gold Iodargyrite Ferric oxyhydroxide
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000678740700001
WOS关键词	X-RAY-ABSORPTION ; INVISIBLE GOLD ; OROGENIC-GOLD ; MASSIVE SULFIDES ; COPPER-DEPOSIT ; PYRITE ; SPECIATION ; RICH ; MINERALIZATION ; MINERALOGY
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363707
作者单位	[Ramzey, Mohamed; Abd El-Rahman, Yasser; Said, Amir] Cairo Univ, Fac Sci, Geol Dept, Giza 12613, Egypt; [Ramzey, Mohamed] Egyptian Mineral Resources Author, Abbasiya, Egypt
推荐引用方式 GB/T 7714	Ramzey, Mohamed,Abd El-Rahman, Yasser,Said, Amir. Weathering products at the historic Qulaan gold prospect, Eastern Desert, Egypt: Implication on the mobility and distribution of arsenic, gold and silver[J],2021,182.
APA	Ramzey, Mohamed,Abd El-Rahman, Yasser,&Said, Amir.(2021).Weathering products at the historic Qulaan gold prospect, Eastern Desert, Egypt: Implication on the mobility and distribution of arsenic, gold and silver.JOURNAL OF AFRICAN EARTH SCIENCES,182.
MLA	Ramzey, Mohamed,et al."Weathering products at the historic Qulaan gold prospect, Eastern Desert, Egypt: Implication on the mobility and distribution of arsenic, gold and silver".JOURNAL OF AFRICAN EARTH SCIENCES 182(2021).