Neoproterozoic Low‐δ<sup>18</sup>O Zircons Revisited: Implications for Rodinia Configuration

Huang, Dingling; Wang, Xiao Lei; Xia, Xiaoping; Wan, Yusheng; Zhang, Feng‐Feng; Li, Jun‐Yong; Du, Debin

doi:10.1029/2018gl081117

Cited by 44 publications

(4 citation statements)

References 94 publications

(261 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 810 Ma step change is limited to China, implying that the Tonian decrease is restricted to geological processes that occurred in China. Previous authors suggested that the Neoproterozoic δ 18 O-depleted magma represents a juvenile crustal source that had undergone hydrothermal alteration at around 810 Ma 40 . Subsequently, the altered material became a source for crustal-derived magmas leading to low δ 18 O in zircon 40 .…”

Section: Oxygen Isotopic Record During the Neoproterozoic Eramentioning

confidence: 99%

Can zircon constrain glacial processes?

Seraine,

Spencer,

Hincks

et al. 2023

Preprint

View full text Add to dashboard Cite

Zircon grains provide insights into crustal production and loss via erosion throughout Earth’s history. We apply multi-dimensional scaling of U-Pb detrital zircon compilations and demonstrate that these depositional patterns were primarily influenced by the rifting of Rodinia and the assembly of Gondwana supercontinents. We identify two-step changes in a zircon dataset spanning the tenure of these continental aggregations, defined by an increase in δ18O values related to the Sturtian and Marinoan ‘Snowball Earth’ glaciations. Correlation between magmatic and detrital zircon Hf and O isotopes implies a flux of old (radiogenically enriched) sediment multiple times during the Tonian and Cryogenian. εHf/δ18O signature at 690 Ma indicates a major flux of old sediment into magmatic systems, which we interpret as due to deep glacial erosion of continental crust during Cryogenian glaciations, corroborating prior studies. This work provides a new quantitative perspective on orogenic and climatic processes that supply sediments to magmatic systems.

show abstract

Section: Oxygen Isotopic Record During the Neoproterozoic Eramentioning

confidence: 99%

Can zircon constrain glacial processes?

Seraine,

Spencer,

Hincks

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Malani rocks in the Tusham area are sandwiched between Delhi quartzite and Vindhyan arenaceous sediments [2,5]. Various rock-types from different locations are extensively studied to get age (~732 ± 50) of MIS using many isotopic proxies [11,[13][14][15][16]. The Malani plume was responsible for the separation of Trans-Aravalli Block (TAB) from East Gondwana, that's why the emplacement of alkali granite and associated acid volcanics having a peraluminous-peralkaline composition in Trans-Aravalli Block are the continental manifestations of plume activity and extensional tectonic regime at 732 Ma [5].…”

Section: Global Map Showing Location and Complexes Of A-type Granitoi...mentioning

confidence: 99%

Petro-Mineralogical and Geochemical Study of the Acid Magmatic Rocks of Tusham Ring Complex, NW Peninsular India

Kumar¹,

Kumar²

2022

Sedimentary Petrology - Implications in Petroleum Industry

View full text Add to dashboard Cite

The present contribution reports about the field and petrographical observations which are very important to explain the magmatic evolution and geodynamic setting of Tusham Ring Complex (TRC). TRC is associated with A-type acid volcano-plutonic rock-association which is very common characteristics of Neoproterozoic Malani Igneous Suite (MIS). Based on the geological field information, the investigated rock-types are classified as volcanic phase, plutonic phase and dyke phase. Petrographically, rhyolites show porphyritic, granophyric, glomeroporphyritic, aphyritic, spherulitic and perlitic textures whereas granites show hypidomorphic, granophyric and microgranophyric textures. Based on mineral chemistry and whole-rock geochemistry, the petro-mineralogical results are justified and proposed that the rocks under study belong to A-type affinity, within-plate and anorogenic magmatism. Physiochemical features i.e. F and Cl-rich biotite, pegmatite rim, high mineralized veins, micro-granular enclaves and altered mineralogy indicate rock-fluid interactions which are caused by magmatic origin or secondary metasomatic alteration superimposed on the host rock.

show abstract

“…900 Ma, most known continental land masses assembled around Laurentia [1,4,20] to form the supercontinent Rodinia [4,20]. Break-up of Rodinia likely initiated after 800 Ma, with peaks in extension-related magmatic activity between 780 and 750 Ma [4,[21][22][23], and the evidence for regional extension in western Laurentia includes the Gunbarrel magmatic event ca. 780 Ma in what is now western Montana and western Wyoming [6,[23][24][25].…”

Section: Tectonic-climatic Framework and Regional Neoproterozoic Stratigraphymentioning

confidence: 99%

Revised Maximum Depositional Age for the Ediacaran Browns Hole Formation: Implications for Western Laurentia Neoproterozoic Stratigraphy

Provow

Newell²,

Dehler³

et al. 2021

Lithosphere

View full text Add to dashboard Cite

Constraining the depositional age of Neoproterozoic stratigraphy in the North American Cordilleran margin informs global connections of major climatic and tectonic events in deep time. Making these correlations is challenging due to a paucity of existing geochronological data and adequate material for absolute age control in key stratigraphic sequences. The late Ediacaran Browns Hole Formation in the Brigham Group of northern Utah, USA, provides a key chronological benchmark on Neoproterozoic stratigraphy. This unit locally comprises <140 m of volcaniclastic rocks with interbedded mafic-volcanic flows that lie within a 3500 m thick package of strata preserving the Cryogenian, Ediacaran, and the lowermost Cambrian history of this area. Prior efforts to constrain the age of the Browns Hole Formation yielded uncertain and conflicting results. Here, we report new laser-ablation-inductively-coupled-mass-spectrometry U-Pb geochronologic data from detrital apatite grains to refine the maximum depositional age of the volcanic member of the Browns Hole Formation to 613±12 Ma (2σ). Apatite crystals are euhedral and pristine and define a single date population, indicating they are likely proximally sourced. These data place new constraints on the timing and tempo of deposition of underlying and overlying units. Owing to unresolved interpretations for the age of underlying Cryogenian stratigraphy, our new date brackets two potential Brigham Group accumulation rate scenarios for ~1400 m of preserved strata: ~38 mm/kyr over ~37 Myr or ~64 mm/kyr over ~22 Myr. These results suggest that the origins of regional unconformities at the base of the Inkom Formation, previously attributed to either the Marinoan or Gaskiers global glaciation events, should be revisited. Our paired sedimentological and geochronology data inform the timing of rift-related magmatism and sedimentation near the western margin of Laurentia.

show abstract

Neoproterozoic Low‐δ¹⁸O Zircons Revisited: Implications for Rodinia Configuration

Cited by 44 publications

References 94 publications

Can zircon constrain glacial processes?

Can zircon constrain glacial processes?

Petro-Mineralogical and Geochemical Study of the Acid Magmatic Rocks of Tusham Ring Complex, NW Peninsular India

Revised Maximum Depositional Age for the Ediacaran Browns Hole Formation: Implications for Western Laurentia Neoproterozoic Stratigraphy

Contact Info

Product

Resources

About

Neoproterozoic Low‐δ18O Zircons Revisited: Implications for Rodinia Configuration

Cited by 44 publications

References 94 publications

Can zircon constrain glacial processes?

Can zircon constrain glacial processes?

Petro-Mineralogical and Geochemical Study of the Acid Magmatic Rocks of Tusham Ring Complex, NW Peninsular India

Revised Maximum Depositional Age for the Ediacaran Browns Hole Formation: Implications for Western Laurentia Neoproterozoic Stratigraphy

Contact Info

Product

Resources

About

Neoproterozoic Low‐δ¹⁸O Zircons Revisited: Implications for Rodinia Configuration