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

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

Geology ◽  
2012 ◽  
Vol 40 (12) ◽  
pp. e282-e283 ◽  
Author(s):  
Birger Rasmussen ◽  
Ian R. Fletcher ◽  
Janet R. Muhling ◽  
Courtney J. Gregory ◽  
Simon A. Wilde
Keyword(s):  
Detrital Zircon ◽  
Mineral Inclusions ◽  
Jack Hills

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

Geology ◽  
2011 ◽  
Vol 39 (12) ◽  
pp. 1143-1146 ◽  
Author(s):  
Birger Rasmussen ◽  
Ian R. Fletcher ◽  
Janet R. Muhling ◽  
Courtney J. Gregory ◽  
Simon A. Wilde
Keyword(s):  
Detrital Zircon ◽  
Mineral Inclusions ◽  
Jack Hills

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 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

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 Hadean zircon formed due to hydrated ultramafic protocrust melting

Geology ◽  
2021 ◽  
Author(s):  
Anastassia Y. Borisova ◽  
Anne Nédélec ◽  
Nail R. Zagrtdenov ◽  
Michael J. Toplis ◽  
Wendy A. Bohrson ◽  
...  
Keyword(s):  
Mineral Assemblage ◽  
Geochemical Modeling ◽  
Ocean Water ◽  
Mineral Inclusions ◽  
Basaltic Melt ◽  
Trace Element Contents ◽  
Work Supports ◽  
Jack Hills ◽  
Viable Mechanism ◽  
Zircon Saturation

Hadean zircons, from the Jack Hills (Western Australia) and other localities, are currently the only window into the earliest terrestrial felsic crust, the formation of which remains enigmatic. Based upon new experimental results, generation of such early crust has been hypothesized to involve the partial melting of hydrated peridotite interacting with basaltic melt at low pressure (<10 km), but it has yet to be demonstrated that such liquids can indeed crystallize zircons comparable to Jack Hills zircon. We used thermodynamic and geochemical modeling to test this hypothesis. The predicted zircon saturation temperatures of <750 °C, together with the model zircon Th, U, Nb, Hf, Y, and rare earth element (REE) contents at 700 °C, δ18OVSMOW (Vienna standard mean ocean water) signatures, and co-crystallizing mineral assemblage were compared to those of the Jack Hills zircon. This comparison was favorable with respect to crystallization temperature, most trace-element contents, and mineral inclusions in zircon. The discrepancy in δ18OVSMOW signatures may be explained by hotter conditions of Hadean protocrust hydration. Our work supports the idea that felsic magma generation at shallow depths involving a primordial weathered ultramafic protocrust and local basaltic intrusions is indeed a viable mechanism for the formation of felsic crust on early Earth.

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

scholarly journals Heterogeneous Hadean crust with ambient mantle affinity recorded in detrital zircons of the Green Sandstone Bed, South Africa

2021 ◽  
Vol 118 (8) ◽  
pp. e2004370118 ◽  
Author(s):  
Nadja Drabon ◽  
Benjamin L. Byerly ◽  
Gary R. Byerly ◽  
Joseph L. Wooden ◽  
C. Brenhin Keller ◽  
...  
Keyword(s):  
South Africa ◽  
Detrital Zircon ◽  
Detrital Zircons ◽  
Precambrian Geology ◽  
Barberton Greenstone Belt ◽  
Rock Record ◽  
Magma Compositions ◽  
Higher Temperature ◽  
Lower Temperature ◽  
Jack Hills

The nature of Earth’s earliest crust and the processes by which it formed remain major issues in Precambrian geology. Due to the absence of a rock record older than ∼4.02 Ga, the only direct record of the Hadean is from rare detrital zircon and that largely from a single area: the Jack Hills and Mount Narryer region of Western Australia. Here, we report on the geochemistry of Hadean detrital zircons as old as 4.15 Ga from the newly discovered Green Sandstone Bed in the Barberton greenstone belt, South Africa. We demonstrate that the U-Nb-Sc-Yb systematics of the majority of these Hadean zircons show a mantle affinity as seen in zircon from modern plume-type mantle environments and do not resemble zircon from modern continental or oceanic arcs. The zircon trace element compositions furthermore suggest magma compositions ranging from higher temperature, primitive to lower temperature, and more evolved tonalite-trondhjemite-granodiorite (TTG)-like magmas that experienced some reworking of hydrated crust. We propose that the Hadean parental magmas of the Green Sandstone Bed zircons formed from remelting of mafic, mantle-derived crust that experienced some hydrous input during melting but not from the processes seen in modern arc magmatism.

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