Thermoluminescence and the shock and reheating history of meteorites—III: The shergottites

Hasan, F. A.; Haq, Munir; Sears, D. W. G.

doi:10.1016/0016-7037(86)90384-4

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…These values are comparable to the values observed for Shergottites (Hasan et al. ), type 3 ordinary chondrites (Sears et al. ), and howardite–eucrite–diogenite meteorites (Sears et al.…”

Section: Resultssupporting

confidence: 87%

“…Dividing the maximum intensity of the induced curve by the intensity of the curve for induced Dhajala TL, the TL sensitivity of the two aliquots of Sutter's Mill SM2-1d measured in this study is 0.0032 AE 0.01 and 0.0032 AE 0.07 (where Dhajala = 1). These values are comparable to the values observed for Shergottites (Hasan et al 1986), type 3 ordinary chondrites , and howardite-eucrite-diogenite meteorites (Sears et al 1997).…”

Section: Resultssupporting

confidence: 86%

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The Sutter's Mill meteorite: Thermoluminescence data on thermal and metamorphic history

Sears

Beauford

2014

Meteorit & Planetary Scien

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A piece of the Sutter's Mill meteorite, fragment SM2‐1d, has been examined using thermoluminescence techniques to better understand its thermal and metamorphic history. The sample had very weak but easily measureable natural and induced thermoluminescence (TL) signals; the signal‐to‐noise ratio was better than 10. The natural TL was restricted to the high‐temperature regions of the glow curve suggesting that the meteorite had been heated to approximately 300 °C within the time it takes for the TL signal to recover from a heating event, probably within the last 105 years. It is possible that this reflects heating during release from the parent body, close passage by the Sun, or heating during atmospheric passage. Of these three options, the least likely is the first, but the other possibilities are equally likely. It seems that temperatures of approximately 300 °C reached 5 or 6 mm into the meteorite, so that all but one of the small Sutter's Mill stones have been heated. The Dhajala normalized induced TL signal for SM2‐1d is comparable to that of type 3.0 chondrites and is unlike normal CM chondrites, the class it most closely resembles, which do not have detectable TL sensitivity. The shape of the induced TL curve is comparable to other low‐type ordinary, CV, and CO chondrites, in that it has a broad hummocky structure, but does not resemble any of them in detail. This suggests that Sutter's Mill is a unique, low‐petrographic–type (3.0) chondrite.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 86%

The Sutter's Mill meteorite: Thermoluminescence data on thermal and metamorphic history

Sears

Beauford

2014

Meteorit & Planetary Scien

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“…Static high-pressure experiments on meteorites replicate the prevailing condition of the parent planetary system and therefore might provide information about the impact processes experienced by the planetary body through various phase transitions, crystallization/amorphization processes of the constituent minerals (Sharp and Decarli, 2006;Sears et al, 1984;Hasan et al, 1986;Stöffler et al, 1991;Miyahara et al, 2014). Though physical properties are important to understand the origin of impact processes in meteorites, only few reports are available (Parthasarathy and Sharma, 2004).…”

Section: Introductionmentioning

confidence: 99%

Geometry and Topology of the Boolean Model on a Stationary Point Processes : A Brief Survey

Chandra

Srihari

Pandey

et al. 2018

Proceedings of the Indian National Science Academy

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We report here high-pressure investigations, using 57 Fe Mössbauer spectroscopic and synchrotron X-ray diffraction techniques with diamond anvil cell on a meteorite fall at Nathdwara (India) categorized as an ordinary H6 chondrite. Mössbauer spectroscopic measurements were performed with compression up to 10GPa under hydrostatic conditions while XRD measurements were carried out up to 16 GPa in both hydrostatic and non-hydrostatic environments. Mössbauer studies demonstrated phase transitions for troilite and pyroxene at low pressures of 4.5 GPa and 6 GPa respectively. Main aim of the study was to investigate behavior of olivine (major constituent of the meteorite sample) which showed an unusual transformation of high spin Fe 2+ configuration at room pressure to low spin Fe 2+ phase at ~ 6 GPa. High pressure XRD measurements supported the above findings. Further XRD studies indicated reversible incomplete transformation of olivine to wadsleyite at 14.46 GPa under hydrostatic condition and complete transformation into ringwoodite at 16.7 GPa under non-hydrostatic compression. Not much has been reported about various phase transformations of meteoritic olivine at room temperature.

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Plate Preface

2014

Special Publications

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Thermoluminescence and the shock and reheating history of meteorites—III: The shergottites

Cited by 14 publications

References 16 publications

The Sutter's Mill meteorite: Thermoluminescence data on thermal and metamorphic history

The Sutter's Mill meteorite: Thermoluminescence data on thermal and metamorphic history

Geometry and Topology of the Boolean Model on a Stationary Point Processes : A Brief Survey

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