Preliminary Report on the Ketchikan Mining District, Alaska, with an Introductory Sketch of the Geology of Southeastern Alaska

Author:   Alfred Hulse Brooks
Publisher:   Sagwan Press
ISBN:  

9781377210322


Pages:   140
Publication Date:   09 February 2018
Format:   Paperback
Availability:   In Print   Availability explained
This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us.

Our Price $25.75 Quantity:  
Add to Cart

Share |

Preliminary Report on the Ketchikan Mining District, Alaska, with an Introductory Sketch of the Geology of Southeastern Alaska


Add your own review!

Overview

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ...impregnated with ore-bearing solutions for some distance from the quartz vein. It is said to carry values. Time did not permit sampling the vein, for the presence of specimen gold necessitated doing the work very thoroughly for results of any value. A number of veins have been stripped on adjacent claims which were not visited. These are said to strike about north and south. On the same property, about onehalf mile south of the mine, there are quartz and calcite veins cutting a schistose diorite. These veins, which strike about north and south, are from 10 to 14 inches wide and carry free gold, with which some tellurides are associated. The values are said to run from $5 to $15. TONGASS NARROWS. General description.--Tongass Narrows is the waterway which separates Gravina from Revillagigedo Island (see Pl. II-and fig. 2). Near its southern end Fig. 2.--Sketch map of Tongass Narrows and George Inlet, showing claim locations. Pennock Island divides the Narrows into two channels. The mountains on either side rise either directly from the shore line or from a narrow, rocky beach. They are parallel to the channel, and reach altitudes of 2,000 and 3,000 feet. From a geologic standpoint this region can be considered a southern extension of the area lying adjacent to Helm Bay. Greenstone-schists outcrop on both sides of Tongass Narrows. Under the microscope this rock is seen to be an altered diabase. On either side of the greenstone-schist belt are argillites belonging to the Ketchikan series. Numerous dioritic dikes cut across the foliation of the schists, which strike northwest and southeast, parallel to the course of the waterway. The dips are usually steep and to the east. Many claims have been staked adjacent to tide water in this belt, but little attempt has ...

Full Product Details

Author:   Alfred Hulse Brooks
Publisher:   Sagwan Press
Imprint:   Sagwan Press
Dimensions:   Width: 15.60cm , Height: 0.80cm , Length: 23.40cm
Weight:   0.204kg
ISBN:  

9781377210322


ISBN 10:   1377210324
Pages:   140
Publication Date:   09 February 2018
Audience:   General/trade ,  General
Format:   Paperback
Publisher's Status:   Active
Availability:   In Print   Availability explained
This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us.

Table of Contents

Reviews

Author Information

Tab Content 6

Author Website:  

Customer Reviews

Recent Reviews

No review item found!

Add your own review!

Countries Available

All regions
Latest Reading Guide

Aorrng

Shopping Cart
Your cart is empty
Shopping cart
Mailing List