Grenville-age A-type and related magmatism in southern Laurentia, Texas and New Mexico, U.S.A.

Li, Yujia; Barnes, Melanie A.; Barnes, Calvin G.; Frost, Carol D.

doi:10.1016/j.lithos.2006.12.010

Cited by 26 publications

(19 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have not identified an obvious source in the Arctic, but these ages are also found in modern sands of the Ob and Yenisey Rivers of western Siberia (Safonova et al, 2010). The next peak is centered at 1153 Ma, and, although small (5% of the distribution), it is important because zircons of this age are common in the Grenville orogen of Laurentia and Baltica (Rainbird et al, 1992;Mosher, 1998;Tollo et al, 2004;Li et al, 2007;Gasser and Andresen, 2013;Pózer Bue and Andresen, 2013), Severnaya Zemlya (Lorenz et al, 2008), and Novaya Zemlya (Lorenz et al, 2013) but are rare in Siberia and are absent from our Late Jurassic samples from the South Anyui suture zone (Fig. 15).…”

Section: Chukotka Triassic Passive-margin Stratamentioning

confidence: 76%

Tectonic evolution of the Mesozoic South Anyui suture zone, eastern Russia: A critical component of paleogeographic reconstructions of the Arctic region

et al. 2015

View full text Add to dashboard Cite

The South Anyui suture zone consists of late Paleozoic-Jurassic ultramafic rocks and Jurassic-Cretaceous pre-, syn-, and postcollisional sedimentary rocks. It represents the closure of a Mesozoic ocean basin that separated two microcontinents in northeastern Russia, the Kolyma-Omolon block and the Chukotka block. In order to understand the geologic history and improve our understanding of Mesozoic paleogeography of the Arctic region, we obtained U-Pb ages on pre-and postcollisional igneous rocks and detrital zircons from sandstone in the suture zone. We identified four groups of sedimentary rocks: (1) Triassic sandstone deposited on the southern margin of Chukotka;(2) Middle Jurassic volcanogenic sandstone that was derived from the Oloy arc, a continental margin arc, along the Kolyma-Omolon block, south of the Anyui Ocean, a sample of which yielded no pre-Jurassic zircons and a single peak at 164 Ma; (3) suture zone sandstone that yielded Late Jurassic maximum depositional ages and likely predated the collision; and (4) a Mid-Cretaceous syncollisional sandstone that had a maximum depositional age of 125 Ma. These rocks were intruded by postkinematic plutons and dikes with ages of 109 Ma and 101 Ma that postdate the collision. We present a seismic-reflection line through the South Anyui suture zone that indicates south-vergence of thrusting of the Chukotka block over the Kolyma-Omolon block, opposite of most existing models and opposite of the vergence in the Angayucham suture zone, the postulated along-strike equivalent in Alaska. This suggests that Chukotka and Arctic Alaska may have different pre-Cretaceous histories, which could solve space problems with existing reconstructions of the Arctic region. We combine our detrital zircon data and interpretations of the seismic line to construct a new GPlates model for the Mesozoic evolution of the region that decouples Chukotka and Arctic Alaska to solve space problems with previous Arctic reconstructions.

show abstract

Section: Chukotka Triassic Passive-margin Stratamentioning

confidence: 76%

Tectonic evolution of the Mesozoic South Anyui suture zone, eastern Russia: A critical component of paleogeographic reconstructions of the Arctic region

et al. 2015

View full text Add to dashboard Cite

show abstract

“…1100 Ma. In Figure 3A, we demonstrate that the geologically preferred position of the Coats Land block inboard of the Grenville front and linked to Laurentia adjacent to the Franklin Mountains in western Texas (southern Laurentia) is compatible with a number of well-dated poles from the Keweenawan province and a less precisely dated pole from the Franklin Mountains (Li et al, 2007). Our reconstruction is slightly different from that of Jacobs et al (2008) because of new paleomagnetic data from Laurentia (Swanson-Hysell et al, 2009).…”

Section: Paleogeographic Implicationsmentioning

confidence: 77%

“…The Red Bluff granitic suite and associated felsic volcanic rocks in the Franklin Mountains near El Paso, Texas, are exposed at the southwestern tip of the Midcontinent rift. The Red Bluff granitic suite, which has a U-Pb zircon age of 1110 ± 19 Ma, has A-type geochemical characteristics and is interpreted to have been emplaced in an anorogenic extensional regime Li et al, 2007).…”

Section: Geologic Settingmentioning

confidence: 99%

Coats Land crustal block, East Antarctica: A tectonic tracer for Laurentia?

Loewy

Dalziel

Pisarevsky

et al. 2011

Geology

View full text Add to dashboard Cite

Undeformed rhyolite and granophyre in the Coats Land crustal block of East Antarctica, dated as 1112 ± 4 Ma, are identical in age to both the Umkondo large igneous province (LIP) of the Kalahari craton (southern Africa) and the early Keweenawan LIP of Laurentia (North America). Although marine and satellite data demonstrate that Coats Land was close to Kalahari within the Gondwana supercontinent, the Coats Land rocks yield Pb isotope compositions strikingly distinct from those of the Umkondo province, yet indistinguishable from rocks of the Keweenawan province. The anorogenic Red Bluff granitic suite, along the present-day southern Laurentian margin in the Franklin Mountains (Texas, USA), is of comparable age, general rock type, and Pb isotope composition to rocks of Coats Land and may provide a piercing point for a Coats Land-Laurentia link. Paleomagnetic poles permit the Coats Land block to be close to this part of Laurentia ca. 1100 Ma and allow juxtaposition of Kalahari and southern Laurentia ca. 1000 Ma. The Coats Land crustal block may therefore be a critical tectonic tracer for placing Laurentia within late Mesoproterozoic and Neoproterozoic paleogeographic reconstructions. If this hypothesis is correct, Laurentia collided with the Kalahari craton along Antarctica's Maud orogen, which would represent a continuation of the ca. 1000 Ma Grenville orogen of eastern and southern Laurentia.

show abstract

“…The A-type magmatism in the eastern Ghats Belt is remarkable for a Proterozoic A-type suite in displaying both over and undersaturated magmatic lineages. Grenville-age (mid-late Mesoproterozoic) A-type granite suites, not associated with substantial bodies of massif-type anorthosite, are described from the subsurface of far west Texas and adjacent New Mexico (1110-1070 Ma silica and basic magmatism; Li et al, 2007), western Dronning Maud Land, Antarctica (1084-1073 Ma rapakivi granites of Mannefallknausane; Rämö et al, 2007), and southern Norway (1170-920 Ma ferroan, high-K granites that postdate ductile deformation of the mid-Mesoproterozoic Sveconorwegian orogeny; Andersen et al, 2009) (Fig. 2).…”

Section: This Issue For a Review)mentioning

confidence: 97%

“…The Grenville-age A-type magmatism along the southern margin of Laurentia (west Texas, New Mexico; Fig. 2) was inferred by Li et al (2007) to manifest a significant addition of juvenile material to the continental crust (via underplated and intraplated mafic rocks and their differentiates). In their study on the Neoproterozoic A-type granitic rocks of southern Brazil (Fig.…”

Section: Crustal Growth Vs Reworkingmentioning

confidence: 99%

IGCP Project 510 “A-type Granites and Related Rocks through Time”: Project vita, results, and contribution to granite research

Dall’Agnol

Frost

Rämö

2012

Lithos

139

View full text Add to dashboard Cite

Grenville-age A-type and related magmatism in southern Laurentia, Texas and New Mexico, U.S.A.

Cited by 26 publications

References 74 publications

Tectonic evolution of the Mesozoic South Anyui suture zone, eastern Russia: A critical component of paleogeographic reconstructions of the Arctic region

Tectonic evolution of the Mesozoic South Anyui suture zone, eastern Russia: A critical component of paleogeographic reconstructions of the Arctic region

Coats Land crustal block, East Antarctica: A tectonic tracer for Laurentia?

IGCP Project 510 “A-type Granites and Related Rocks through Time”: Project vita, results, and contribution to granite research

Contact Info

Product

Resources

About