干旱区生态环境知识资源中心(Arid): Quartz Crystallinity Index of Arabian Sands and Sandstones

Arid

DOI	10.1029/2020EA001582
	Quartz Crystallinity Index of Arabian Sands and Sandstones
	Radwan, Omar A.; Humphrey, John D.; Al-Ramadan, Khalid A.
通讯作者	Radwan, OA ; Humphrey, JD (corresponding author), King Fahd Univ Petr & Minerals KFUPM, Geosci Dept, Coll Petr Engn & Geosci, Dhahran, Saudi Arabia.
来源期刊	EARTH AND SPACE SCIENCE
EISSN	2333-5084
出版年	2021
卷号	8 期号:9
英文摘要	Although quartz crystallinity index (QCI) was developed more than four decades ago, it remains a relatively new tool used in provenance studies. This study examines QCI values of Arabian sands (Quaternary sands from Nafud, Dahna, and AlRub'AlKhali deserts), and Arabian sandstones (Paleozoic and Mesozoic sandstones from northern and central Arabia). QCI values of sandstones range from 8.2 to 9.8. For Quaternary occurrences, QCI values of Nafud sands range from 7.4 to 9.5, Dahna sands range from 7.9 to 9.4, and AlRub'AlKhali sands range from 8.8 to 9.4. The data confirm that Arabian sands are derived mainly from early Paleozoic sandstones, with subordinate contributions from late Paleozoic and Mesozoic sandstones. They also highlight the role that sediment homogenization plays in narrowing QCI values of AlRub'AlKhali sands. Highest and lowest QCI values raise questions about the role of chert in controlling of QCI values of Arabian sands and sandstones. Arabian sandstones of Late Ordovician, Late Devonian, Late Permian, Late Triassic, and Cretaceous age possess the highest QCI values (>9.5). These time intervals coincide with lower abundances of siliceous sponges, and therefore fewer potential sources of chertification/silicification. Cambrian sandstones and Quaternary sands possess the lowest QCI values (<8.5). This coincides with the fact that both are of eolian origin, environments, which usually contain large quantities of quartz-rich dust that are documented to be a primary source of silica for chert formation. Therefore, we propose that the presence of chert is responsible for the extreme values of QCI in Arabian sands and sandstones.
英文关键词	quartz crystallinity index sand chert provenance sandstone Arabian Peninsula
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000702253100025
WOS关键词	SILICA-REPLACED FOSSILS ; SIGNAL INTENSITY ; DUST ; AGGREGATE ; ORIGIN
WOS类目	Astronomy & Astrophysics ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362958
作者单位	[Radwan, Omar A.; Humphrey, John D.; Al-Ramadan, Khalid A.] King Fahd Univ Petr & Minerals KFUPM, Geosci Dept, Coll Petr Engn & Geosci, Dhahran, Saudi Arabia
推荐引用方式 GB/T 7714	Radwan, Omar A.,Humphrey, John D.,Al-Ramadan, Khalid A.. Quartz Crystallinity Index of Arabian Sands and Sandstones[J],2021,8(9).
APA	Radwan, Omar A.,Humphrey, John D.,&Al-Ramadan, Khalid A..(2021).Quartz Crystallinity Index of Arabian Sands and Sandstones.EARTH AND SPACE SCIENCE,8(9).
MLA	Radwan, Omar A.,et al."Quartz Crystallinity Index of Arabian Sands and Sandstones".EARTH AND SPACE SCIENCE 8.9(2021).