Our consortium on Stardust material has published a new article about primitive fine-grained materials found in comet dust. The paper, titled “Fine-grained material associated with a large sulfide returned from Comet 81P/Wild 2” (primary author Zack Gainsforth), takes a look at a large particle called Andromeda, and how it shielded this delicate material upon aerogel … More New Paper on Stardust fine grained material
I’ll be traveling down to UC Santa Cruz on Nov. 27th to give a colloquim talk on oxygen isotopes in the early Solar System. For anyone looking to check it out, the seminar begins at 3:30 pm, in Nat. Sci. Annex room 101. The title of my talk is: Oxygen isotopes in the early Solar … More UCSC Whole Earth Seminar, Nov. 27th
This year at LPSC, we will report on the past year of our consortium study of Stardust cometary tracks, with the goal of exploring the chemical, mineralogical and isotopic diversity of materials returned from comet 81P/Wild 2. We extracted six tracks from aerogel tile C2031 using our keystone extraction technique, and studied the materials and terminal … More LPSC Abstract on Stardust Particles
The presence of hydrated minerals in chondrites indicates that water played an important role in the geologic evolution of the early Solar System; however, the process of aqueous alteration is still poorly understood. We investigated the oxygen isotopic compositions of secondary minerals in CR chondrites to constrain fluid conditions on the asteroidal parent body. Calcite, … More New Paper on CR Chondrites
On Tuesday at LPSC 2017, I presented my latest results on the redox conditions for formation of Al-rich chondrules. Al-chondrules are important to planetary science as they represent some of the earliest formed materials in the Solar System; however, the environmental conditions and mechanisms of formation remain largely unknown. You can check out a high-res … More Aluminum-rich chondrules formed under reducing conditions in the solar nebula
Did you know that some asteroids were once wet? We used radiometric dating to discover that water flowed on primitive asteroids over 4.5 billion years ago. To learn more about this and what it means about the early history of our Solar System, read more here.
Image credit: Bill Stafford (JSC), NASA @Astromaterials Samples collected by NASA missions and returned to Earth require delicate preparation and complicated analytical techniques. Some samples, such as comet dust collected from the Stardust mission, or interplanetary dust particles (IDPs) collected from the Earth’s stratosphere, are particularly tricky to work with as many of the samples … More Joint LPI/JSC Sample Training