干旱区生态环境知识资源中心(Arid): Skarn fluid sources as indicators of timing of Cordilleran arc emergence and paleogeography in the southwestern United States

Arid

DOI	10.1130/G49005.1
	Skarn fluid sources as indicators of timing of Cordilleran arc emergence and paleogeography in the southwestern United States
	Gevedon, M.; Lackey, J. S.; Barnes, J. D.
通讯作者	Gevedon, M (corresponding author), Univ Texas, Dept Geol Sci, Austin, TX 78712 USA.
来源期刊	GEOLOGY
ISSN	0091-7613
EISSN	1943-2682
出版年	2021
卷号	49 期号:11 页码:1317-1321
英文摘要	Oxygen isotope ratios of garnet provide well-established means to investigate crustal fluid histories. Traditionally, delta O-18 values from skarn garnets have been used to track the hydrothermal evolution of an individual skarn body through time. We, however, use garnet from 14 skarns from the Jurassic (ca. 175 to ca. 148 Ma) Cordilleran margin arc (southwestern United States) to provide regional tectonic context to arc magmatism and hydrothermal activity. We document arc-wide garnet 8 18 0 variability of similar to 19 parts per thousand (-8.9 parts per thousand to +10.3 parts per thousand, n = 159), providing a record of contrasting meteoric fluid ingress between northern (Sierra Nevada) and southern (Mojave Desert) arc segments. Strongly negative garnet delta O-18 values (<=-3 parts per thousand) are limited to the Mojave Desert arc segment and can only form in the presence of meteoric fluid, requiring shallow formation in subaerial crust. When combined with U-Pb garnet ages, the delta O-18 data provide a minimum radiometric age of local subaerial arc emergence and temporal constraint on the migration of the Jurassic paleoshoreline in the Mojave Desert section of the arc.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000714685100010
WOS关键词	INDEPENDENCE DIKE SWARM ; OXYGEN-ISOTOPE ; SIERRA-NEVADA ; HYDROTHERMAL SYSTEMS ; MOJAVE DESERT ; GARNET ; RECORD ; FLOW
WOS类目	Geology
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/2XILL650/368017
作者单位	[Gevedon, M.; Barnes, J. D.] Univ Texas, Dept Geol Sci, Austin, TX 78712 USA; [Lackey, J. S.] Pomona Coll, Geol Dept, Claremont, CA 91711 USA
推荐引用方式 GB/T 7714	Gevedon, M.,Lackey, J. S.,Barnes, J. D.. Skarn fluid sources as indicators of timing of Cordilleran arc emergence and paleogeography in the southwestern United States[J],2021,49(11):1317-1321.
APA	Gevedon, M.,Lackey, J. S.,&Barnes, J. D..(2021).Skarn fluid sources as indicators of timing of Cordilleran arc emergence and paleogeography in the southwestern United States.GEOLOGY,49(11),1317-1321.
MLA	Gevedon, M.,et al."Skarn fluid sources as indicators of timing of Cordilleran arc emergence and paleogeography in the southwestern United States".GEOLOGY 49.11(2021):1317-1321.