STILPNOMELANE CO-EXISTING WITH BIOTITE IN A RYOKE METAMORPHIC ROCK

Reactions leading to the formation and breakdown of stilpnomelane in the Otago Schist, New Zealand

Semi-pelitic rocks ranging in grade from the prehnite–pumpellyite to the greenschist facies from southeastern Otago, New Zealand, have been investigated in order to evaluate the reactions leading to formation and breakdown of stilpnomelane. Detrital grains of mica and chlorite along with fine-grained authigenic illite and chlorite occur in lower-grade rocks with compactional fabric parallel to ...

Specific Metamorphic Rock Names Recommended by IUGS

Distribution of Fe and Mg between garnet and biotite in Scottish Barrovian metamorphic zones

The distribution coefficient KD=(Mg / Fe)garnet/(Mg/Fe)biotite has been calculated for eight garnet-biotite pairs from rocks ranging from the garnet isograd to the staurolite zone along the Stonehaven coast of NE Scotland. This distribution coefficient depends upon metamorphic temperature and is not dependent upon the Mn and Ca content of garnet. Garnet-biotite geothermometer yields temperature...

Thyrotoxicosis co-existing with ulcerative colitis.

A 32-year-old lady was admitted with complaints of recurrent episodes of vomiting and loose stools associated with tenesmus and blood and mucus. She also had a neck swelling since 11 years of age, and had features of thyrotoxicosis for five to six months. She responded to balsalazide only after her thyroid status was controlled with carbimazole.

Sheehan's syndrome co-existing with Graves' disease.

Sheehan's syndrome (SS), which is an important cause of hypopituitarism, is common in developing countries. The most common presentation is the absence of lactation and amenorrhea. Hypothyroidism rather than hyperthyroidism is the usual expected phenomenon in SS. Postpartum hyperthyroidism is also common and Graves' disease (GD) is an important cause of postpartum hyperthyroidism. Here we repor...