WebThe 37 kimberlites in the Buffalo Head Hills kimberlite province are distributed over a 6000 square kilometre area. Kimberlite outcrops have been identified in four locations … http://mccgeoscience.com/public_html/PDFs/2003%20IKC_BHH%20Field%20Guide.pdf
Basin Clear Hills area rd Nechako Smoky River/ Head Hills …
WebK252 pipe is a diamondiferous diatreme in the Buffalo Head Hills kimberlite field of Northern Alberta, Canada. It is thought to have formed about 85 million years ago when … The Buffalo Head Hills kimberlite field is a group of kimberlitic volcanic pipes or diatremes in north-central Alberta, Canada. As of 2011, 41 kimberlite pipes, of which 28 are diamondiferous, had been identified in the field. They were emplaced during Late Cretaceous to early Paleocene time. As of 2014 the … See more The Buffalo Head Hills (BHH) kimberlite field is part of the Northern Alberta kimberlite province, along with the Birch Mountains kimberlite field and the Mountain Lake cluster. It is located about 400 km (250 mi) north of … See more According to radiometric dating, the BHH kimberlite pipes were emplaced in two pulses, one between about 81 to 88 Ma (million years ago) … See more The majority of the BHH kimberlites are diamondiferous, in contrast to those of the Birch Mountains kimberlite field to the northeast which are mostly barren of diamonds. Based on petrography and whole-rock geochemistry, the BHH pipes are classed as See more • Volcanism of Canada • Volcanism of Western Canada • List of volcanoes in Canada See more Deep beneath the BHH kimberlite field lies a 2.0 to 2.4 billion year old Precambrian craton called the Buffalo Head Terrane, which has no exposure at surface. The Precambrian craton is overlain by about 1,600 m (5,200 ft) of Paleozoic and Mesozoic See more The BHH kimberlite pipes cover areas ranging from one to 47 hectares (120 acres). They represent maar-style volcanoes which … See more Based on examination of more than 700 examples, the BHH diamonds range in color from colorless to yellow and brown, and most are transparent and colorless. The majority are … See more switchbotロック タグ
Kimberlite volcanic facies and eruption in the Buffalo …
WebJefferson County, MO Official Website WebMontgomery County, Kansas. Date Established: February 26, 1867. Date Organized: Location: County Seat: Independence. Origin of Name: In honor of Gen. Richard … WebJan 29, 2007 · The Buffalo Head Hills group of kimberlites is the third largest district of significantly diamond-bearing kimberlites in Canada after Lac de Gras in the Northwest … switchbot ロック 2台