Detrital Zircon from the Jack Hills and Mount Narryer, Western Australia: Evidence for Diverse >4.0 Ga Source Rocks

2005 ◽  
Vol 113 (3) ◽  
pp. 239-263 ◽  
Author(s):  
James L. Crowley ◽  
John S. Myers ◽  
Paul J. Sylvester ◽  
Richard A. Cox
Keyword(s):  
Western Australia ◽  
Detrital Zircon ◽  
Source Rocks ◽  
Jack Hills

scholarly journals Pervasive remagnetization of detrital zircon host rocks in the Jack Hills, Western Australia and implications for records of the early geodynamo

2015 ◽  
Vol 430 ◽  
pp. 115-128 ◽  
Author(s):  
Benjamin P. Weiss ◽  
Adam C. Maloof ◽  
Nicholas Tailby ◽  
Jahandar Ramezani ◽  
Roger R. Fu ◽  
...  
Keyword(s):  
Western Australia ◽  
Detrital Zircon ◽  
Host Rocks ◽  
Jack Hills

Reply to Comment on “Pervasive remagnetization of detrital zircon host rocks in the Jack Hills, Western Australia and implications for records of the early dynamo”

2016 ◽  
Vol 450 ◽  
pp. 409-412 ◽  
Author(s):  
Benjamin P. Weiss ◽  
Adam C. Maloof ◽  
T. Mark Harrison ◽  
Nicholas L. Swanson-Hysell ◽  
Roger R. Fu ◽  
...  
Keyword(s):  
Western Australia ◽  
Detrital Zircon ◽  
Host Rocks ◽  
Jack Hills

Detrital zircon U–Pb geochronology and geochemistry of late Neoproterozoic – early Cambrian sedimentary rocks in the Cathaysia Block: constraint on its palaeo-position in Gondwana supercontinent

2019 ◽  
Vol 156 (9) ◽  
pp. 1587-1604 ◽  
Author(s):  
Chen Xiong ◽  
Yaoling Niu ◽  
Hongde Chen ◽  
Anqing Chen ◽  
Chenggong Zhang ◽  
...  
Keyword(s):  
Western Australia ◽  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Source Rocks ◽  
Geochemical Data ◽  
Early Cambrian ◽  
Lhasa Terrane ◽  
Northern India ◽  
Cathaysia Block ◽  
Late Neoproterozoic

AbstractWe present updated U–Pb ages and Hf isotopic compositions of detrital zircons and whole-rock geochemical data to investigate the provenance and tectonic setting of late Neoproterozoic and early Cambrian sandstones from the Cathaysia Block, in order to offer new constraints on its tectonic evolution and its palaeo-position within the supercontinent. The source rocks for the studied sandstones were dominated by felsic–intermediate materials with moderate weathering history. U–Pb dating results show major populations atc. 2500 Ma, 1000–900 Ma and 870–716 Ma with subordinate peaks at 655–532 Ma, consistent with the global Neoarchean continental crust growth, assembly and break-up of Rodinia, and Pan-African Event associated with the formation of Gondwana. Zircon U–Pb ages and Hf isotopic data suggest that most derived from exotic terranes once connected to the Cathaysia Block. Using whole-rock geochemical analysis, it was determined that the studied sedimentary rocks were deposited in a passive continental margin and the Cathaysia and Yangtze blocks were part of the same continent; no Cambrian ocean existed between them. Compiling a detrital zircon dataset from Qiangtang, northern India, the Lhasa Terrane and Western Australia, the Cathaysia Block seems to be more similar to the Qiangtang and western part of the northern India margin, instead of having a direct connection with the Lhasa Terrane and Western Australia in the Gondwana reconstruction during the late Neoproterozoic and Cambrian eons.

scholarly journals Reevaluating the evidence for a Hadean-Eoarchean dynamo

2020 ◽  
Vol 6 (15) ◽  
pp. eaav9634 ◽  
Author(s):  
Cauê S. Borlina ◽  
Benjamin P. Weiss ◽  
Eduardo A. Lima ◽  
Fengzai Tang ◽  
Richard J. M. Taylor ◽  
...  
Keyword(s):  
Western Australia ◽  
Magnetic Recording ◽  
Detrital Zircon ◽  
Thermal Evolution ◽  
Early Earth ◽  
Jack Hills ◽  
Time Of Origin

The time of origin of the geodynamo has important implications for the thermal evolution of the planetary interior and the habitability of early Earth. It has been proposed that detrital zircon grains from Jack Hills, Western Australia, provide evidence for an active geodynamo as early as 4.2 billion years (Ga) ago. However, our combined paleomagnetic, geochemical, and mineralogical studies on Jack Hills zircons indicate that most have poor magnetic recording properties and secondary magnetization carriers that postdate the formation of the zircons. Therefore, the existence of the geodynamo before 3.5 Ga ago remains unknown.

CA-TIMS U-PB DATES FROM HADEAN ZIRCON FROM THE JACK HILLS, AUSTRALIA: IMPROVING THE ACCURACY OF AGES OF METAMORPHOSED DETRITAL ZIRCON

2017 ◽  
Author(s):  
James L. Crowley ◽  
◽  
Mark D. Schmitz ◽  
John S. Myers ◽  
Jesse B. Walters
Keyword(s):  
Detrital Zircon ◽  
Jack Hills

scholarly journals Metamorphic replacement of mineral inclusions in detrital zircon from Jack Hills, Australia: Implications for the Hadean Earth: COMMENT

Geology ◽  
2012 ◽  
Vol 40 (12) ◽  
pp. e281-e281 ◽  
Author(s):  
Michelle Hopkins ◽  
T. Mark Harrison ◽  
Craig E. Manning
Keyword(s):  
Detrital Zircon ◽  
Mineral Inclusions ◽  
Jack Hills

Double dating (U–Pb and (U–Th)/He) of detrital zircon from the Gonfolite Group (European Alps) and implications for the lag-time approach to detrital thermochronology

2021 ◽  
Author(s):  
Marco G. Malusà ◽  
Owen A. Anfinson ◽  
Daniel F. Stockli
Keyword(s):  
Detrital Zircon ◽  
Country Rock ◽  
Lag Time ◽  
Source Rocks ◽  
Magmatic Zircon ◽  
Contact Aureole ◽  
European Alps ◽  
Earth Planet ◽  
Shallow Level ◽  
Plutonic Rocks

<p>Detrital thermochronologic analyses are increasingly employed to develop quantitative models of landscape evolution and constrain rates of exhumation due to erosion. Crucial for this kind of application is a correct discrimination between thermochronologic ages that record cooling due to exhumation, i.e., the motion of parent rocks towards Earth’s surface, and thermochronologic ages that record cooling independent from exhumation, as expected for example in volcanic and shallow-level plutonic rocks. A suitable approach for the identification of magmatic crystallization ages is provided by double dating, which combines for example U–Pb and (U–Th)/He analyses of the same mineral grain. Magmatic zircon crystallized from volcanic or shallow-level plutonic rocks should display identical U–Pb and (U–Th)/He (ZHe) ages within error, because of rapid magma crystallization in the upper crust where country rocks are at temperatures cooler than the partial retention zone of the ZHe system. Conversely, zircon grains crystallized at greater depth and recording cooling during exhumation should display ZHe ages younger than the corresponding U–Pb ages. These latter ZHe ages may constrain the long-term exhumation history of the source rocks according to the lag-time approach, provided that a range of assumptions are properly evaluated (e.g., Malusà and Fitzgerald 2020). Here, we explore the possibility that detrital zircon grains yielding ZHe ages younger than the corresponding U–Pb ages may record country-rock cooling within a contact aureole rather than exhumation. To tackle this issue, we applied a double-dating approach including U-Pb and ZHe analyses to samples of the Gonfolite Group exposed south of the European Alps. The Gonfolite Group largely derives from erosion of the Bergell volcano-plutonic complex and adjacent country rocks, and its mineral-age stratigraphy is extremely well constrained (Malusà et al. 2011, 2016). Analyses were performed in the UTChron Geochronology Facility at University of Texas at Austin. For U-Pb LA-ICPMS depth-profile analysis, all detrital zircon grains were mounted without polishing, which allowed for subsequent ZHe analysis on the same grains. Zircon for ZHe analyses were selected among those not derived from the Bergell complex or other Periadriatic magmatic rocks, as constrained by their U-Pb age. We found that ca 40% of double-dated grains, despite yielding a ZHe age younger than their U-Pb age, likely record cooling within the Bergell contact aureole, not exhumation. These findings have major implications for a correct application of the lag-time approach to detrital thermochronology and underline the importance of a well-constrained mineral-age stratigraphy for a reliable geologic interpretation.</p><p>Malusà MG, Villa IM, Vezzoli G, Garzanti E (2011) Earth Planet Sci Lett 301(1-2), 324-336</p><p>Malusà MG, Anfinson OA, Dafov LN, Stockli DF (2016) Geology 44(2), 155-158</p><p>Malusà MG, Fitzgerald, PG (2020) Earth-Sci Rev 201, 103074</p>

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