Dolerite

Claridge, G. G. C. and Campbell, I. B. (1984). Mineral transformations during weathering of dolerite under cold arid conditions. N.Z. Geol. Geophys. 25, 537-545. 

In vertisols of Queensland and Tasmania derived on basalt, dolerite and alluvium, total Co is in the range of 7-70 mg/kg, but in soils derived on granodiorite, total Co is 3.5 mg/kg. In soils of the Adelaide and Southeast regions, Co varies from 1-30 mg/kg. 

In vertisols on diorite, basalt, alluvions, and dolerite, total Mn is in the range of 1250-2750 mg/kg, while brown isohumic soils on calcareous sandstone and clayey sediments contain 550-1670 mg/kg Mn. Soils in the Adelaide and Southeast regions contain 140-1400 mg/kg total Mn. In solods on granitic rocks and alluvions, total Mn is 60-990 mg/kg. 

In Queensland, soils on clayey sediments have 3-12 mg/kg total Mo, and mediterranean red soils on granodiorite and basalt contain 2-8.5 mg/kg Mo. In vertisols on dolerite in Tasmania, total Mo is 2.5-3.5 mg/kg. 

Augite (Ca,Mg,Fe,Al)2(Si,Al)206 Basalts, andesites, tephrites, limburgites gabbros, dolerites, ultramafic rocks. Sometimes in granites... 

The Tyrone Plutonic Group comprises a basic igneous association of layered, isotropic and pegmatitic gabbros, doleritic sheeted dykes and rare basaltic pillow lavas first recognized as ophiolitic by Hutton etal. (1985). 

Anand, R.R. Gdkes, R.J. (1984) Weathering of hornblende, plagiodase and chlorite in meta-dolerite, Australia. Geoderma 34 261—280 Anand, R.R. Gdkes, R.J. (1984a) Weathering... 

Gopel C., Allegre C. J., and Xu R.-H. (1984) Lead isotopic study of the Xigaze ophiolite (Tibet) the problem of the relationship between magmatites (gabbros, dolerites, lavas) and tectonites (harzburgites). Earth Planet. Sci. Lett. 69, 301-310. 

The mafic rocks are komatiites, basalts, gab-bros and dolerites, and the felsic rocks are both tonalite-trondhjemite-granodiorites (TTG) and granodiorite-granite-monzogranites (GGM). Analyses of galena and K-feldspar provide initial Pb isotopic compositions, as they contain little or no uranium. 

Hergt, j., Chappell, B., McCulloch, M., McDou-GALL, I. Chivas, a. 1989. Geochemical and isotopic constraints on the origin of the Jurassic dolerites of Tasmania. Journal of Petrology, 30, 841-883. 

An alkaline dolerite has intruded the lower portion of the Rundle Formation at different stratigraphic levels in the Stuart Deposit, thermally metamorphosing the invaded sequence for an average of 46m over an area of 2.25 sq. km. The age of the dolerite is set at 26.8m.y. using the K/Ar method (4). 

Figure 1-2. Mars Oasis, Antarctica a terrestrial niche for the survival of endohthic cyanobacteria in a limits of life" situation a translucent Beacon sandstone outcrop containing endolithic microbial communities on top of a dolerite sill. Dr David Wynn-Williams, Head of Antarctic Astrobiology at the British Antarctic Survey, Cambridge, is prospecting for endohths. Reproduced from the book Astrobiology The Quest for the Conditions of Life, Eds Gerda Homeck, Christa Baumstark-Khan, 2003, Springer. With kind permission of Springer Science and Business Media (see color plate section)...

During an investigation of zeolites from Northern Victoria Land, Antarctica, numerous zeolitic species, among which the pentasils are predominant, were found in the Jurassic Ferrar Dolerites of Mt. Adamson heulandite, stellerite, stilbite, mordenite, erionite, levyne. 

Figure 2.1 Correlation coefficient patterns for Ti, Cu, K and Ba for the Root Rand dolerites. Data from the correlation manix of Cox and Clifford (1982 — Table 4). The similarity in. the patterns for K and Ba implies some geochemical coherence.

Gilbert T. D., Stephenson L. C. and Philp R. P. (1985) Effect of a dolerite intmsion on triterpane stereochemistry and kerogen in Rundle oil-shale, Australia. Org. Geochem. 8, 163-169. 

The volcanoes of the Transantarctic Mountains occur between Cape Hallett in northern Victoria Land and Mount Early (87°04 S, 153°46 W), which is located only 300 km from the South Pole. The volcanic mountains and cinder cones in the Transantarctic Mountains define the McMurdo Volcanic Province which is subdivided into four regions (Kyle 1990). These volcanoes were active in Late Tertiary time starting less than 25 million years ago and continuing to the present as in the case of Mount Erebus. All of them have extruded silica-undersaturated and alkali-rich lavas in marked contrast to the Ferrar Dolerite and Kirkpatrick Basalts of Middle Jurassic age both of which consist largely of silica-saturated tholeiites. These two suites of volcanic rocks are products of quite different petrogenetic processes that nevertheless occurred at different times in the lithospheric mantle underlying the Transantarctic Mountains. The petrogenesis of these different suites of volcanic rocks is the subject of Chapter 12 (Kirkpatrick Basalt) and Chapter 13 (Ferrar Dolerite), and Chapter 16 (Cenozoic Volcanoes). 

Alkali-rich volcanic rocks Dolerite sills and basalt flows Sandstone, shale, tillite, coal... 

---