干旱区生态环境知识资源中心(Arid): Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc

Arid

DOI	10.1130/GES02225.1
	Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc
	Economos, Rita C.; Barth, Andrew P.; Wooden, Joseph L.; Paterson, Scott R.; Friesenhahn, Brody; Wiegand, Bettina A.; Anderson, J. Lawford; Roell, Jennifer L.; Palmer, Emerson F.; Ianno, Adam J.; Howard, Keith A.
通讯作者	Economos, RC (corresponding author), Southern Methodist Univ, Roy M Huffington Dept Earth Sci, POB 750395, Dallas, TX 75275 USA.
来源期刊	GEOSPHERE
ISSN	1553-040X
出版年	2021
卷号	17 期号:6 页码:2042-2061
英文摘要	The Mojave Desert region is in a critical position for assessing models of Laramide orogenesis, which is hypothesized to have initiated as one or more seamounts subducted beneath the Cretaceous continental margin. Geochronological and geochemical characteristics of Late Cretaceous magmatic products provide the opportunity to test the validity of Laramide orogenic models. Laramide-aged plutons are exposed along a transect across the Cordilleran Mesozoic magmatic system from Joshua Tree National Park in the Eastern Transverse Ranges eastward into the central Mojave Desert. A transect at latitude similar to 33.5 degrees N to 34.5 degrees N includes: (1) the large upper-crustal Late Cretaceous Cadiz Valley batholith, (2) a thick section of Proterozoic to Jurassic host rocks, (3) Late Cretaceous stock to pluton-sized bodies at mesozonal depths, and (4) a Jurassic to Late Cretaceous midcrustal sheeted complex emplaced at similar to 20 km depth that transitions into a migmatite complex truncated along the San Andreas fault. This magmatic section is structurally correlative with the Big Bear Lake intrusive suite in the San Bernardino Mountains and similar sheeted rocks recovered in the Cajon Pass Deep Scientific Drillhole. Zircon U-Pb geochronology of 12 samples via secondary ionization mass spectrometry (SIMS) (six from the Cadiz Valley batholith and six from the Cajon Pass Deep Scientific Drillhole) indicates that all Cretaceous igneous units investigated were intruded between 83 and 74 Ma, and Cajon Pass samples include a Jurassic age component. A compilation of new and published SIMS geochronological data demonstrates that voluminous magmatism in the Eastern Transverse Ranges and central Mojave Desert was continuous throughout the period suggested for the intersection and flat-slab subduction of the Shatsky Rise conjugate deep into the interior of western North America. Whole-rock major-element, trace-element, and isotope geochemistry data from samples from a suite of 106 igneous rocks represent the breadth of Late Cretaceous units in the transect. Geochemistry indicates an origin in a subduction environment and intrusion into a crust thick enough to generate residual garnet. The lack of significant deflections of compositional characteristics and isotopic ratios in igneous products through space and time argues against a delamination event prior to 74 Ma. We argue that Late Cretaceous plutonism from the Eastern Transverse Ranges to the central Mojave Desert represents subduction zone arc magmatism that persisted until ca. 74 Ma. This interpretation is inconsistent with the proposed timing of the docking of the Shatsky Rise conjugate with the margin of western North America, particularly models in which the leading edge of the Shatsky Rise was beneath Wyoming at 74 Ma. Alternatively, the timing of cessation of plutonism precedes the timing of the passage of the Hess Rise conjugate beneath western North America at ca. 70-65 Ma. The presence, geochemical composition, and age of arc products in the Eastern Transverse Ranges and central Mojave Desert region must be accounted for in any tectonic model of the transition from Sevier to Laramide orogenesis.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000726762600003
WOS关键词	SIERRA-NEVADA BATHOLITH ; PROTEROZOIC CRUSTAL EVOLUTION ; SOUTHWESTERN US CORDILLERA ; SAN-GABRIEL MOUNTAINS ; SOUTHERN CALIFORNIA ; GRANULITE GNEISSES ; RUBY MOUNTAINS ; DESERT REGION ; ZIRCON ; CONSTRAINTS
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/2XILL650/374014
作者单位	[Economos, Rita C.; Friesenhahn, Brody] Southern Methodist Univ, Roy M Huffington Dept Earth Sci, POB 750395, Dallas, TX 75275 USA; [Barth, Andrew P.; Roell, Jennifer L.; Palmer, Emerson F.] Indiana Univ Purdue Univ, Dept Earth Sci, 723 West Michigan St, Indianapolis, IN 46202 USA; [Wooden, Joseph L.] US Geol Survey, Marietta, GA 30064 USA; [Paterson, Scott R.] Univ Southern Calif, Dept Earth Sci, 3651 Trousdale Pkwy, Los Angeles, CA 90089 USA; [Wiegand, Bettina A.] Univ Gottingen, Appl Geosci, Goldschmidtstr 3, D-37077 Gottingen, Germany; [Anderson, J. Lawford] Boston Univ, Dept Earth & Environm, 675 Commonwealth Ave, Boston, MA 02215 USA; [Ianno, Adam J.] Juniata Coll, Geol Dept, 1700 Moore St, Huntingdon, PA 16652 USA; [Howard, Keith A.] US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA
推荐引用方式 GB/T 7714	Economos, Rita C.,Barth, Andrew P.,Wooden, Joseph L.,et al. Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc[J],2021,17(6):2042-2061.
APA	Economos, Rita C..,Barth, Andrew P..,Wooden, Joseph L..,Paterson, Scott R..,Friesenhahn, Brody.,...&Howard, Keith A..(2021).Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc.GEOSPHERE,17(6),2042-2061.
MLA	Economos, Rita C.,et al."Testing models of Laramide orogenic initiation by investigation of Late Cretaceous magmatic-tectonic evolution of the central Mojave sector of the California arc".GEOSPHERE 17.6(2021):2042-2061.