...Fig. 12. Cross section through the northern end of the Birthday reef. The reef passes updip into a coplanar mineralized fault located in the near-vertical hinge of the Waiutu anticline. The thickness of the reef increases where it splays off the anticline hinge onto the W-dipping western limb...

...Figure 6. Photomicrographs (plane polarized light) showing progressive deformation and alteration from the least altered amphibolite host rock towards the most altered equivalent next to the quartz reef (ore zone) at Birthday gold mine as a result of CO 2 and K 2 O infiltration along...

... Mikropaleontologii’, volume 10, was dedicated to her 70th birthday and includes a list of her honors and publications to that date. During World War II, the Soviet Union was increasingly concerned about the possible loss of the Caspian and Baku oil fields which were the country’s mainstay for petroleum...

... to the stratigraphy of the Carboniferous Limestone and associated igneous rocks of the Derbyshire Dome and environs, notably in the unravelling of the nature of the block and basin transition and the role and origin of Walsortian and Cracoan apron ‘reef’ limestones. His mapping of the overlying Millstone Grit...

... were the three articles (1929a, b, c) on analcite Na(AlSi 2 O 6 )•H 2 O and meerschaum beds (sepiolite), varves and climate, and algal reefs and oolite in the Green River. In his classic paper on the varves (annually paired layers), he calculated an extent of six million years for the formation...

...Harry S. Ladd ABSTRACT Existing reefs are complex structures built of calcium carbonate taken from sea water by shallow-water organisms. They vary in size and shape depending on the nature of their foundations and on many ecologic factors. The conventional classification recognizes fringing reefs...

... imprint on the planet, revives his memory. Nothing says ‘holism’ quite like the Gaia hypothesis and this year also marks the 100th birthday of James Lovelock, an event celebrated in July this year by a suitably wide-ranging three-day meeting in Exeter. For many, Lovelock epitomises the spirit...

... birthday on June 21, 2020, after a six-month battle with cancer. Tony’s research career in sulfide systems developed in the mid-1960s when he joined Gunnar Kullerud at the Carnegie Institution in Washington to undertake experiments with metallic sulfides at high temperatures. The approach Tony took...

... and state-of-the-art studies in all of these directions. [email protected] © 2014, IGM, Siberian Branch of the RAS 2014 IGM, Siberian Branch of the RAS This Special Issue “Urgent Problems of Petroleum Geology” marks the 80th birthday of Academician Alexei Emilyevich Kontorovich...

... on the occasion of his 60th birthday. In a career spanning more than 35 years, Nic (or ‘Prof Nic’ as he is known to his students) has trained an entire generation of young geologists, most of whom feature prominently in South Africa’s mineral industry. He has not only introduced countless international...

... Hebrides expedition was probably the 1897 and 1898 expeditions to the coral atoll of Funafuti in the Ellice Islands (modern Tuvalu) which validated Darwin’s hypothesis on the formation of coral atolls. 20 This hypothesis suggests that coral atolls originated as fringing reefs around volcanic islands...

..., but rarely economic except where the nature of the mineralisation allows for economic extraction, e.g., in the Kraaipan Greenstone Belt, where the volume of BIF is large enough to contain the mineralised fracture system. Gold in the Paleoproterozoic Transvaal Supergroup occurs in the lowermost Black Reef...

... feet and solid basalt core from 4,208 to 4,222 feet. Each hole penetrated several hundred feet of soft, Quaternary reef limestone before entering a thick, Tertiary section of similar rocks. The Tertiary rocks are mostly limestones with minor amounts of dolomite and dolomitic limestone. Some...

..., by 2055 when the pool will be celebrating its 100th birthday, it can still produce 4 million bbl (0.6 million m 3 ) of oil annually with a cumulative output of 801.8 million bbl (127.5 million m 3 ) of oil and a recovery factor of 43.7%, whereas an additional 9.2 TCF (259.9 billion m 3 ) of CO 2...