The Rooiberg Group is a 6-km-thick sequence of mostly volcanic rocks, which represent the first phase of magmatic activity associated with the Bushveld Complex. These strata include, in ascending stratigraphic order, the Dullstroom, Damwal, Kwaggasnek, and Schrikkloof Formations. Units of the lower Dullstroom Formation range from basalts to andesites and comprise two compositional suites: high ...

Magnetic data is useful in both hydrocarbon exploration and mining exploration. In hydrocarbon exploration, aeromagnetic data is an effective method for locating strike-slip faulting in magnetic basement. Also, high resolution surveys enhance delineation of both subtle basement features and intrasedimentary sources. In fact, magnetic methods has evolved from its sole use for mapping basement st...

Using infrared spectroscopy, we found that changes in the in-plane charge dynamics attributable to static stripe order in La(1.275)Nd(0.6)Sr(0.125)CuO(4) or superconductivity in La(1.875)Sr(0.125)CuO(4) are confined to energies smaller than 100 cm(-1). An absorption peak in the low- omega conductivity of the Nd-doped compound is suggestive of localization effects due to the reduced dimensionali...

شور : ،ينيلاب ييامزآراک هعلاطم نيا رد ۲۰ يحارج لمع ديدناك يندومزآ هب يموتكرتسيه دندش هداد ياج لرتنک و شيامزآ هورگ ود رد يفداصت روط . راتفر لوط رد يحارج زا شيپ يتخانش ينامرد ۸ ورگ یارب هسلج شيامزآ ه دوبهب عيرست ظاحل زا هورگ ود ره ،يحارج لمع زا سپ و دش هداد شزومآ رد يرتسب ياهزور دادعت ،يفرصم نكسم يوراد زود نازيم ينعي يمسج تيلاعف هب تشگزاب و ناتسراميب دندش يسررب هرمزور ياه . هداد شهوژپ ياه يرام...

Post-collisional alkaline intrusive rocks from the Dabie orogen were studied for their whole-rock major-trace elements and Sr-Nd-Hf-Pb isotopes, as well zircon U-Pb ages Hf-O isotopes. The results provide geochemical constraints on nature of mantle sources thus insight into crust-mantle interaction in continental collision zone. are composed syenite nepheline syenite. Syn-magmatic dating by LA-...

کچ ی هد پ ی ش مز ی هن ه و فد : ساسا د مردنس رد نامرد ي سفنت سرتس ي ظنت نادازون داح ي سکا لدابت م ي و نژ د ي سکا ي د هدوب نبرک تسا طسوت هک کبس اـه ي ناـمرد ي فلتخم ي هلمجزا لکتورپ INSURE ماجنا م ي دوش ا اذل . ي هعلاطم ن فدهاب اقم ي هس عضو ي ت اه ي ندب ي عضو رب رمد و زاب قاط ي سفنت ت ي هـب لاتـبم سراـن نادازون ردنس د م ي سفنت سرتس ي لکتورپ اب نامرد تحت داح INSURE ماجنا درگ ...

New measurements of Os, He, Sr and Nd isotopes, along with major and trace elements, are presented for basalts from the three volcanic flank zones in Iceland and from Jan Mayen Island. The Os/Os ratios in lavas with <30 ppt Os (n = 4) are elevated compared to ratios in coexisting olivine and appear to be contaminated at a shallow level. The Os/Os ratios in the remaining lavas with >30 ppt Os (n...