Parautochthonous Megabreccias and Possible Evidence of Impact-induced Hydrothermal Alteration in Holden
نویسندگان
چکیده
crops of parautocthonous megabreccia (MBu) in Uzboi Valles ~x km from the rim of Holden crater. PARAUTOCHTHONOUS MEGABRECCIAS AND POSSIBLE EVIDENCE OF IMPACT-INDUCED HYDROTHERMAL ALTERATION IN HOLDEN CRATER, MARS. L. L. Tornabene, G. R. Osinski, and A. S. McEwen, Lunar and Planetary Lab, University of Arizona, 1541 E. University Blvd., Tucson, Arizona, 85721, USA ([email protected], Dept. of Earth Sciences, University of Western Ontario, London, Ont., Canada N6A 5B7.
منابع مشابه
Hydrothermal activity recorded in post Noachian-aged impact craters on Mars
Hydrothermal systems have previously been reported in ancient Noachian and Hesperian-aged craters on Mars using CRISM but not in Amazonian-aged impact craters. However, the nakhlite meteorites do provide evidence of Amazonian hydrothermal activity. This study uses CRISM data of 144 impact craters of ≥7 km diameter and 14 smaller craters (3–7 km diameter) within terrain mapped as Amazonian to se...
متن کاملA GIS-based weights-of-evidence model for mineral potential mapping of hydrothermal gold deposits in Torbat-e-Heydarieh area
The method of weights of evidence is one of the most important data driven methods for mineral potential mapping in GIS. In this method, considering the characteristics of known mineralized locations, we can prospect new mineralized areas. In this research work, the method of weights of evidence has been used for hydrothermal gold potential mapping in Torbat-e-Heydarieh area, east of Iran. As a...
متن کاملDifferential Alteration of Glass Clasts in the Surficial Suevites of the Ries Crater, Germany
The mid-Miocene (14.3 + 0.2 Ma; [1]) Ries impact crater located in southern Germany was formed in a two-layer target comprised of dominantly Mesozoic flat lying siliciclastic and carbonate sedimentary rocks that unconformably overlie crystalline Hercynian basement [2]. Ries is a complex crater with a total diameter of ~24 km [2]. Impactite and ejecta deposits are exceptionally well preserved. T...
متن کاملزمینشناسی، دگرسانی، کانیسازی و ژئوشیمی محدودهی خونیک، جنوب بیرجند
Khunik area is located in eastern Iran, about 106 km south of Birjand. Preliminary prospecting in the area, using ASTER mineral mapping (SAM) for locating possible alteration zone in the area provided satisfactory results when checked with field observation. The area comprises outcrops of Paleocene to Eocene volcanics, which was intruded telescopically by several subvolcanic intermediate bodies...
متن کاملApplication of Spectral Analysis in Mapping Hydrothermal Alteration of the Northwestern Part of the Kerman Cenozoic Magmatic Arc, Iran
The northwestern part of the Kerman Cenozoic magmatic arc (KCMA) contains many areas with porphyry copper mineralization. In this research, we used the advanced space-borne thermal emission and reflection radiometer (ASTER) and Enhanced Thematic Mapper plus (ETM+) images of this region to map the distribution of hydrothermally altered rocks, based on their mineral assemblages. The spectral meas...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009