Ithuluzi le-APXC eligibele i-lunar rover ye-ISRO's Chandrayaan-3 moon mission lenze ucwaningo lwe-in-situ spectroscopic ukuze kutholwe ubuningi bezinto ezisemhlabathini ozungeze indawo okufikela kuyo esifundeni esiseningizimu yeNyanga. Lolu bekuwucwaningo lokuqala lwe-in-situ lokubunjwa kwezakhi enhlabathini yenyanga esifundeni se-polar eseningizimu (ucwaningo lwangaphambilini luhlaziye ukwakheka kwenhlabathi ezindaweni ezimaphakathi nenkabazwe kuya ezimaphakathi). Okutholakele kubonise ukufana ekubunjweni kwenhlabathi yenyanga. Idwala le-Ferroan Anorthosite (FAN), elicebile ngamaminerali e-plagioclase lalikhona kakhulu. Lona umkhiqizo we-lunar magma ocean (LMO) crystallization. Kuphinde kwatholwa inala yamaminerali anothe nge-magnesium ephakamisa umnikelo ovela ongqimbeni olujulile lweNyanga. Sekukonke, lolu cwaningo lusekela umbono we-Lunar Magma Ocean (LMO) wokuziphendukela kwemvelo kweNyanga.
Imishini ye-ISRO ye-Chandrayaan-3 yenyanga ibonise ikhono lokuhlala kancane enyangeni ngomhla zingama-23 ku-Agasti 2023 ngenkathi isifiki sayo sehlela phezu kwenyanga eduze nesigxobo esiseningizimu endaweni engu-69.37-degree South latitude kanye ne-32.35-degree longitude yaseMpumalanga (kamuva eyaqanjwa ngokuthi iphoyinti le-Shiv Shakti).
I-rover esetshenzisiwe yahlola indawo eseduze edabula cishe amamitha angu-103 ezinsukwini eziyishumi ezilandelayo futhi yenza izivivinyo endaweni kusetshenziswa ithuluzi le-Alpha Particle X-ray Spectrometer (APXS) phakathi kwe-rover.
Umsebenzi ulinganise ukwakheka kwezinto ezisenhlabathini yenyanga ezindaweni zokuma kwe-rover ngokubeka ithuluzi le-APXS eduze nendawo ukuze lithole izilinganiso nokuyibuyisela emuva ngenkathi ihamba. I-X-ray Fluorescence Spectroscopy kanye ne-Particle Induced X-ray Emission amasu asetshenziswa ukuze kutholakale futhi kulinganise izakhi ezihlukahlukene ezinkulu nezincane ezikhona enhlabathini yenyanga, njengeSi, Mg, Al, Fe, Ca, kanye noMn, Cr, Ti, I-Ni, K, Na, kanye, S njll. Ngokukhanyisela indawo yenyanga nemithombo yayo ye-Cm-244, i-APXS iqophe imigqa ye-X-ray yesici yazo zonke izici ezinkulu nezincane. I-APXS yenze ukuhlola okungu-23 endleleni ye-rover futhi yathola i-X-ray spectrum endaweni ngayinye.
Lesi izilinganiso zokuqala ze-in situ zezakhi zezakhi enhlabathini yenyanga ezindaweni eziseningizimu ezine-latitude ephezulu yeNyanga. Izifundo zangaphambilini zokulinganisa izakhi enhlabathini yenyanga zenziwe kusetshenziswa amasampula aqoqwe ezindaweni ezimaphakathi nenkabazwe ukuya ezifundeni ezimaphakathi nendawo ngemishini ye-Apollo, Luna kanye ne-Chang'e 5, ama-moteorite enyanga angaziwa indawo avela kuyo kanye nezilinganiso ezisuka maphakathi nendawo. -izifunda ze-latitude ngemishini ye-Chang'e 3 ne-Chang'e 4.
Ukuhlaziywa kwedatha ye-APXS kusukela ezilinganisweni ezingu-23 endaweni ngayinye eduze nendawo yokufikela kuveze ukuthi ukwakheka okuyisisekelo kuyafana kuyo yonke indawo ehlolwe yi-rover. Umhlabathi uyingxube yezinhlobo ezimbili zamadwala. I-Ferroan Anorthosite (FAN) rock, ecebile ngamaminerali e-plagioclase iwumkhiqizo we-lunar magma ocean (LMO) crystallization. Ithuluzi le-APXS liphinde lathola inqwaba yamaminerali anothe nge-magnesium.
Ulwazi lokwakheka kwezakhi endaweni yenyanga lubalulekile ekuqondeni ukwakheka nokuvela kweNyanga. Ngokusho kwe-Lunar Magma Ocean (LMO) hypothesis, iNyanga yayiwulwandle lweMagma ekuqaleni. Amaminerali asindayo acwila futhi akhe izingqimba zangaphakathi njengoba i-magma iphola. Ngesikhathi esifanayo, amaminerali alula antanta futhi akhe uqweqwe lwangaphandle lweNyanga.
Ukuba khona okuvelele kwe-Ferroan Anorthosite (FAN) enhlabathini yenyanga endaweni ye-rover landing site, okuwumphumela oyinhloko walolu cwaningo kusekela umbono we-Lunar Magma Ocean (LMO). Ukuba khona kwamaminerali acebile nge-magnesium kuphakamisa ukuxuba namaminerali kusuka kungqimba lwangaphakathi.
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References:
- Vadawale, SV, Mithun, NPS, Shanmugam, M. et al. I-Chandrayaan-3 APXS izilinganiso zobuningi obuyisisekelo ku-latitude ephezulu yenyanga. Imvelo (2024). https://doi.org/10.1038/s41586-024-07870-7
- Ukukhishwa kwemidiya ye-ISRO. I-APXS eyakhelwe i-PRL ku-Pragyan Rover yase-Chandrayaan-3 yenza Izilinganiso Zokuqala Zenala Yezinto Zokuqala Zomhlabathi Wenyanga Esifundeni EsiseNingizimu Senyanga. Kuthunyelwe ngomhla ka-21 Agasti 2024. Itholakala e- https://www.isro.gov.in/media_isro/pdf/APXS_CH3.pdf
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