- Pati J.K., Reimold W.U. (2006). Ballen quartz impact melt rock from the Dhala impact structure, Bundelkhand craton, central India // 40 ESLAB Symposium: 1 International Conference on Impact Cratering in the Solar System, Noordwijk, 8-12 May, 2006, Noordwijk: ESA, P. 169-170
- Pati J.K. et al. (2015). Pseudotachylitic breccia from the Dhala impact structure, north-central India: Texture, mineralogy and geochemical characterization . Tectonophysics, Vol.649, P. S18-32
- Li S.S., Santosh M., Keerthy S. et al. (2018). Anatomy of impactites and shocked zircon grains from Dhala reveals Paleoproterozoic meteorite impact in the Archean basement rocks of Central India // Gondwana Research. - Vol. 54. - P. 81-101.
- Keerthy S., Vishnu C.L., Reshma N. et al. (2019). Reconstructing the dimension of Dhala Impact Crater, Central India, through integrated geographic information system and geological records // Planetary and Space Science. - Vol. 177. - P. 104691.
- Agarwal A., Kumar S., Joshi G., Agarwal K.K. (2020). Evidence for shock provides insight into the formation of the central elevated area in the Dhala impact structure, India // Meteoritics and Planetary Science. - Vol. 55, No. 12. - P. 2772-2779.
- Agarwal A. (2022). Impact Craters in India // Jour. Geol. Soc. India - 98:286
- Joshi G., Phukon P., Agarwal A., Ojha A.K. (2023). On the Emplacement of the Impact Melt at the Dhala Impact Structure, India // Journal of Geophysical Research: Planets. - Vol. 128, No. 7.
- Behera S.S., Tiwari S., Pandey A.K. [et al.] (2024). The probable direction of impact at Dhala impact structure, India deciphered from microfracture intensity and X-ray diffractometry: a new potential impact direction indicator // Earth, Planets and Space. - Vol. 76, No. 1. - P. 83.
- Tiwari S., Joshi G., Phukon P. [et al.] (2025). Emplacement of monomict breccia and crater size estimate at the Dhala impact structure, India // Meteoritics and Planetary Science. - Vol. 60, No. 3. - P. 663-679.
Спутниковая фотография кратера из Google Earth.
Image of a ballen-textured quartz in plane polarized light from Dhala impact structure.
cm.
| |
Обзор статей (в том числе, из РЖ ВИНИТИ "Геология и геофизика"):
Данные по параметрам колец шаровой структуры кварца из пород ударного кратера Дхала размером 15 км, Индия. Средний размер колец структуры кварца из этого кратера (49,06 мкм) больше размера колец кварца кратеров Ванапитей, Деллен и Мин (5,06, 9,66 и 29,2 мкм, соответственно). Ширина каждого кольца колеблется в пределах 1,63-6,26 мкм. Предполагается, что шаровая структура в кварце образовалась в точках локального перегрева зерен, подвергнутых ударной деформации
(Pati, Reimold, 2006).
Характеризуются псевдотахилитовые брекчии, установленные в керне скважин на глубине 348-502 м в центре структуры
(Pati et al., 2015)
Subsequent investigations by Pati in 2005 revealed diagnostic microscopic shock metamorphic features, which resulted in the confirmation of Dhala as
an impact structure. The structure is biggest in Asia and has a diameter of c.11 km and covers an area of about 64 km2. Unlike Lonar crater, Dhala is supposed to be a complex impact crater. The stratigraphy of
the Dhala impact structure starts with a fractured granitoids, which forms the basement with a 12.36 m thick suevite horizon occurring
within the fractured basement. Over the fractured granitoids lies a c.65m thick layer of impact melt breccia. It comprises quartz, feldspar,
zircon, and some opaque mineral clasts with partially to completely melted granitoid and highly vesiculated melt clasts embedded in a
very fine-grained matrix of mainly quartz and feldspar. A 1.8 m thick layer of altered suevite occurs above the impact melt breccia.
(Agarwal, 2022).
На главную