Continental growth histories revealed by detrital zircon trace elements: A case study from India

McKenzie, N. Ryan; Smye, Andrew J.; Hegde, V. S.; Stöckli, Daniel F.

doi:10.1130/g39973.1

Cited by 42 publications

(24 citation statements)

References 46 publications

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“…Zircon trace element geochemistry can be used to identify petrogenesis of zircon grains and establish constraints on their provenance (e.g., Barth et al, 2013;Belousova et al, 2002;Claiborne et al, 2006;Grimes et al, 2007Grimes et al, , 2015Kirkland et al, 2015;McKenzie et al, 2018;Rubatto, 2002;Trail et al, 2012). We have investigated trace element compositions (Hf, U/Yb, U/Th, Zr/Hf, and Eu/Eu*) in detrital zircon grains dated 360-160 Ma from New Zealand and 260-140 Ma from New Caledonia.…”

Section: Resultsmentioning

confidence: 99%

Continental Crustal Growth Processes Revealed by Detrital Zircon Petrochronology: Insights From Zealandia

et al. 2020

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Establishing spatial, temporal, and geochemical relationships between magmatism and the broader tectonics of accretionary orogens is important for understanding continental crustal growth processes. Here we reconstruct the Paleozoic and Mesozoic evolution of the active continental margin of Zealandia (eastern Gondwana), using a combination of detrital zircon geochronology, trace element geochemistry and Hf isotope data. We find that zircon grains dated 360–160 Ma from New Zealand are characterized by εHfi (+15 to +2) and trace element compositions typical of predominantly juvenile magmatic sources. In contrast, the εHfi (+15 to −5) and trace element compositions of detrital zircon grains dated 245–140 Ma from New Caledonia reflect a mix of juvenile and evolved crustal sources. Secular trends in trace element and Hf isotope compositions of zircon grains suggest that magmatism and continental crustal growth in Zealandia during the Devonian‐Cretaceous were controlled by switches from trench advance to trench retreat. Orogenesis and crustal growth were controlled by a long‐lived westward dipping subduction system, which during the Permian‐Triassic, was intermittently affected by distinct phases of arc accretion (e.g., of the Brook Street intraoceanic arc) and orogenesis (e.g., driven by trench advance). These phases of orogenesis coincided with the Gondwanide Orogen (265–230 Ma), which might have been controlled by a plate‐scale reorganization event following the final assembly of Pangea supercontinent.

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Section: Resultsmentioning

confidence: 99%

Continental Crustal Growth Processes Revealed by Detrital Zircon Petrochronology: Insights From Zealandia

et al. 2020

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“…Most of the studies listed above use stable isotope (including clumped‐isotope) or paleontological methods to estimate paleo‐elevations (e.g., Currie et al, 2005; Deng et al, 2019; Ding et al, 2017; Ingalls et al, 2018; Quade et al, 2011; Rowley & Garzione, 2007; Spicer et al, 2003; Su et al, 2019). In recent years, additional methods have been developed to estimate Moho depth based on whole‐rock geochemical and isotopic compositions of intermediate to felsic magmatic rocks (Alexander et al, 2019; Chapman et al, 2015; Chiaradia, 2015; Hu et al, 2017; Profeta et al, 2015), or the compositions of accessory minerals such as zircon (Balica et al, 2020; McKenzie et al, 2018). Since most convergent margins are in isostatic equilibrium at scales of hundreds of kilometers, there is a direct correlation between crustal thickness and elevation assuming crustal Airy equilibrium (Airy, 1855; Lee et al, 2015), described as

italicdh / italicdH = ()(, 1 - ρ_{c} / ρ_{m})

where h is the elevation, H is the crustal thickness, ρ c is the crustal density, and ρ m is the upper mantle density.…”

Section: Introductionmentioning

confidence: 99%

Quantitatively Tracking the Elevation of the Tibetan Plateau Since the Cretaceous: Insights From Whole‐Rock Sr/Y and La/Yb Ratios

Chapman

et al. 2020

Geophysical Research Letters

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Crustal thickness, elevation, and Sr/Y and (La/Yb)N of magmatic rocks are strongly correlated for subduction‐related and collision‐related mountain belts. We quantitatively constrain the paleo‐elevation of the Tibetan Plateau since the Cretaceous using empirically derived equations. The results are broadly consistent with previous estimates based on stable isotope and structural analyses, supporting a complex uplift history. Our data suggest that a protoplateau formed in central Tibet during the Late Cretaceous and was higher than the contemporaneous Gangdese arc. This protoplateau collapsed before the India‐Asia collision, during the same time period that elevation in southern Tibet was increasing. During the India‐Asia collision, northern and southern Tibet were uplifted first followed by renewed uplift in central Tibet, which suggests a more complicated uplift history than commonly believed. We contend that a broad paleovalley formed during the Paleogene in central Tibet and that the whole Tibetan Plateau reached present‐day elevations during the Miocene.

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“…Trace element compositions of detrital accessory minerals may provide a diagnostic indicator for their source lithology and possibly its tectonic setting, and this possibility has been of particular interest with regards to zircon. The Th/U ratio has often been invoked as a discriminant between igneous and metamorphic zircon (Rubatto, ; Schaltegger et al, ), and a wider palette of elements has more recently been considered (Barth et al, ; Belousova et al, ; Cavosie et al, ; Grimes et al, ; Grimes et al, ; McKay et al, ; McKenzie et al, ; Nardi et al, ). In particular, Grimes et al () noted that ratios involving U, Nb, Sc, Yb, Gd, and Ce seemed to provide an effective means for distinguishing zircons formed from mantle‐dominated settings (i.e., mid ocean ridges and ocean islands) from continental arc settings.…”

Section: Discussionmentioning

confidence: 99%

Benefits of a Multiproxy Approach to Detrital Mineral Provenance Analysis: An Example from the Merrimack River, New England, USA

Gaschnig

2019

Geochem Geophys Geosyst

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The advantages in provenance research of U‐Pb dating different detrital minerals along with simultaneously analyzing trace elements is demonstrated in a study of sand from the mouth of the Merrimack River in New England, USA. Zircon ages record episodes of magmatism in the Early Paleozoic, peaking in the Early Devonian, followed by quiescence through the remainder of the Paleozoic and additional magmatic episodes in the Jurassic and Cretaceous. Simultaneous measurement of trace elements in zircons reveals a shift from arc magmatism to crustal melting associated with terrane collision in the Early Devonian, while many Jurassic grains are clearly derived from A‐type granites. Detrital monazites and rutiles have Devonian and Permian ages. Many of the older monazites have trace element characteristics suggestive of igneous origin, while Permian monazites are clearly metamorphic and record orogenesis that is absent from the detrital zircon record. Rutile grains have trace element chemistry indicative of mostly metasedimentary source rocks, and Zr thermometry indicates growth under amphibolite facies conditions. Age offsets between monazite and rutile populations provide information about the region's cooling history. Titanite grains have trace element chemistry mostly consistent with igneous origin and U‐Pb ages lining up with minor zircon age populations in the Ordovician‐Silurian and the Middle Devonian, suggesting that these magmatic episodes produced metaluminous compositions. These results show that combining trace element fingerprinting with dating and analyzing multiple detrital mineral species provide a more complete portrait of the geologic history of the sediment source region than U‐Pb dating of zircon alone.

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Continental growth histories revealed by detrital zircon trace elements: A case study from India

Cited by 42 publications

References 46 publications

Continental Crustal Growth Processes Revealed by Detrital Zircon Petrochronology: Insights From Zealandia

Continental Crustal Growth Processes Revealed by Detrital Zircon Petrochronology: Insights From Zealandia

Quantitatively Tracking the Elevation of the Tibetan Plateau Since the Cretaceous: Insights From Whole‐Rock Sr/Y and La/Yb Ratios

Benefits of a Multiproxy Approach to Detrital Mineral Provenance Analysis: An Example from the Merrimack River, New England, USA

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