@article{3496,
  keywords = {ARGON - Isotopes, GEOLOGY - Tectonics, GEOPHYSICS - Radioactive Methods, ROCK - Metamorphic, CUMMINGTONITE, NAMAQUA PROVINCE, PALAEOMAGNETIC SAMPLES, GEOLOGICAL SURVEYS},
  author = {T.C. Onstott and R.B. Hargraves and P. Joubert},
  title = {Constraints on the tectonic evolution of the Namaqua Province II: reconnaissance palaeomagnetic and 40 Ar/39Ar results from the Namaqua Province and Kheis Belt ( South Africa).},
  abstract = {Palaeomagnetic samples were collected from sites along a 500 km traverse from the high-grade metamorphic rocks of the central area of the Bushmanland Subprovince near Okiep, to amphibolite facies rocks of the E area of the belt, along the W border of the Kaapvaal Craton. The Namaqua zone pole (Long. = 328oE, Lat. = 8oN, N = 6, K = 20, alpha 95 = 15), is consistent with previously published palaeomagnetic poles for the Okiep Norite and the Noncaip (Konkoonsie) Gabbro, although opposite in polarity to the Okiep remanence. Also reported is a new palaeomagnetic site pole from the Port Edward Charnockite (Long. = 149oE, Lat. = 5oN, n = 6, kappa = 57, alpha 95 = 9), which is also consistent with the Okiep results. Rocks from 4 sites distributed over 200 km along the E margin of the Gordonia Subprovince yield a completely different palaeomagnetic pole (Long. = 203oE, Lat. = 41oS, N = 4, K = 14 alpha 95 = 26). A 1,2 Ga40Ar/39Ar plateau date on cummingtonite from the Jannelsepan amphibolite, suggests that the metamorphic rocks of the E area may have cooled through their magnetic blocking temperatures at a significantly earlier time than the granulites of the central area.-from Authors},
  year = {1986},
  journal = {Transactions - Geological Society of South Africa},
  volume = {89},
  number = {2},
  pages = {143-170},
  url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0022825860\&partnerID=40\&md5=5c1664e52cb026184818fed8fe31f785},
}