The Lake House meteorite - in the news again

I'm intrigued by some of the key components in the story as it is told by Colin and Judith Pillinger -- ie the arrival on Planet Earth c 30,000 years ago, the "frozen preservation" for 20,000 years, the discovery by the Neolithic or Bronze Age inhabitants of Salisbury Plain, the burial in a ceremonial mound, and finally the rediscovery and extraction from the calcium-rich environment.  I am trying to track down the published papers which underpin this story...........

https://brian-mountainman.blogspot.com/2013/04/new-evidence-of-glaciation-on-salisbury.html

I tried to get hold of the research data more than 10 years ago, without much success.........

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The recent paper:

Pillinger, CT and Pillinger, JM. 2024 Grandfather's stone: the Lake House Meteorite, Britain's largest and earliest extraterrestrial sample. Wilts Arch & Nat Hist Magazine 117, pp 181-196.

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The record:

Lake House 51°8.98’N, 1°48.60’W

England, United Kingdom

Found: Early 20th century

Classification: Ordinary chondrite (H5)

History: Lake House is a large Elizabethan country house dating from 1578 located in the village of Lake in the county of Wiltshire, England. Photographic evidence demonstrates that the meteorite was located on the top step at the main entrance to Lake House at least as early as the first decade of the twentieth century. Robert Hutchison (Curator of meteorites, NHM) was notified of the existence of the meteorite in a letter from Robin Bailey dated 13 Nov 1991. A note written on a copy of this letter in Robert Hutchison’s hand writing and initialed "RH" and dated 16 Sept 1991 reads: "probably a chondrite Ol +Px +Ct …? metal with Ni …sulphides". Mr Bailey was unaware of a detailed history of the meteorite, which he described as being collected by his grandfather.

Physical characteristics: The single remaining mass can be recognized as the major portion of a larger meteorite. The existing fragment, measuring 55 × 38 × 35 cm, is dark brown, extremely weathered and deeply fractured, consistent with being exposed to the elements for a long period of time.

Petrography: Distinct chondrules are present, but these tend to have poorly defined boundaries. Porphyritic types predominate, but barred olivine and radial pyroxene textured chondrules are also common. Chondrule mesostasis is recrystallized, with grain sizes generally below 50 μm. The sample is cut by a network of veins, up to 2 mm thick, filled with secondary weathering products.

Geochemistry: The oxygen isotope composition of the meteorite was measured (after washing in EATG to remove weathering products) δ17O = 1.99 ± 0.05 (1σ); δ18O = 2.76 ± 0.09 (1σ); Δ17O = 0.55 ± 0.01 (1σ) (n=2) which is in the accepted range for H chondrites.

Classification: In thin section the sample is a heavily weathered (W5), moderately shocked (S4), equilibrated ordinary chondrite (H5).

Specimens: The owners of the main mass have agreed to loan it on a long term basis to the local county museum in Salisbury, where it will be on display to the general public. A 1 kg representative mass will remain at OU as the type specimen for research purposes.

https://www.lpi.usra.edu/meteor/metbull.php?code=56144
https://brian-mountainman.blogspot.com/2013/04/scientific-note-on-lake-house-meteorite.html
https://www.researchgate.net/publication/253308918_The_Meteorite_from_Lake_House

https://www.science.org/content/article/mystery-meteorite-house-sting

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From a BBC News write-up

"It's very unusual to find a meteorite this big in Britain," Prof Colin Pillinger said.

"They are very unstable, they contain a lot of metallic iron which oxidises and the meteorite falls to pieces.

"So the only logical explanation of how such a big meteorite may have survived being on Earth for 30,000 years is that it fell on or near a glacier and was in a deep freeze for 20,000 years."

Professor Pillinger, famed for his work on the Beagle II Mars explorer, said he believed the low-humidity and freezing conditions would have protected the rock from weathering.

"Then along came some druids, scavenging on Salisbury Plain for strange or interesting stones, and it was picked up and used in a chalk mound," he said.

"And the 'reducing environment' of chalk - the anaerobic environment - would have prevented the iron from oxidising."

The giant fragment of asteroid is then thought to have been unearthed by a previous occupant of Lake House, who is known to have excavated several nearby burial mounds.

"He was an archaeologist and was digging every barrow up in sight trying to find treasure," said Professor Pillinger.

"And we think he got it out of a barrow and added it to his collection."

The meteorite, known as a common chondrite, is due to go on display at the Salisbury and South Wiltshire Museum in autumn.

Adrian Green, the museum's director, said there was still "a lot of debate" about how the rock came to be on the doorstep of Lake House.

"But it's not uncommon for exotic rocks to be built into burial mounds," he added.

"And it's still covered in chalk which is the bedrock of the landscape.

"And it's colossal - it would take four people to lift it - and it's not aesthetically pleasing, so common sense dictates that this has not been shipped from abroad at ridiculous cost and significant effort, but that it came from the UK."